rcu commits for 2.6.40

btw., i'm seeing a boot hang too, with the attached config:

PM: Adding info for platform:serial8250
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
device: 'ttyS0': device_add
PM: Adding info for No Bus:ttyS0

INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 1, t=6002 jiffies)
INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 1, t=24034 jiffies)
INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 1, t=42066 jiffies)
INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 1, t=6002 jiffies)
INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 1, t=24034 jiffies)

(and the stall warnings go on forever)

Thanks,

Ingo

#
# Automatically generated make config: don't edit
# Linux/i386 2.6.39-rc7 Kernel Configuration
# Fri May 13 15:37:17 2011
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
CONFIG_X86=y
CONFIG_INSTRUCTION_DECODER=y CONFIG_OUTPUT_FORMAT="elf32-i386" CONFIG_ARCH_DEFCONFIG="arch/x86/configs/i386_defconfig" CONFIG_GENERIC_CMOS_UPDATE=y CONFIG_CLOCKSOURCE_WATCHDOG=y CONFIG_GENERIC_CLOCKEVENTS=y CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_NEED_DMA_MAP_STATE=y CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_GPIO=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set CONFIG_RWSEM_XCHGADD_ALGORITHM=y CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y CONFIG_GENERIC_CALIBRATE_DELAY=y
# CONFIG_GENERIC_TIME_VSYSCALL is not set CONFIG_ARCH_HAS_CPU_RELAX=y CONFIG_ARCH_HAS_DEFAULT_IDLE=y CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y CONFIG_HAVE_SETUP_PER_CPU_AREA=y CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
# CONFIG_HAVE_CPUMASK_OF_CPU_MAP is not set CONFIG_ARCH_HIBERNATION_POSSIBLE=y CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_ZONE_DMA32 is not set CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_AUDIT_ARCH is not set CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y CONFIG_X86_32_SMP=y
CONFIG_X86_HT=y CONFIG_ARCH_HWEIGHT_CFLAGS="-fcall-saved-ecx -fcall-saved-edx" CONFIG_KTIME_SCALAR=y CONFIG_ARCH_CPU_PROBE_RELEASE=y CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config" CONFIG_CONSTRUCTORS=y
CONFIG_HAVE_IRQ_WORK=y
CONFIG_IRQ_WORK=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_BZIP2=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_BZIP2 is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
# CONFIG_KERNEL_LZO is not set
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_FHANDLE is not set
CONFIG_TASKSTATS=y
# CONFIG_TASK_DELAY_ACCT is not set
CONFIG_TASK_XACCT=y
# CONFIG_TASK_IO_ACCOUNTING is not set
CONFIG_AUDIT=y
CONFIG_AUDITSYSCALL=y
CONFIG_AUDIT_WATCH=y
CONFIG_AUDIT_TREE=y
CONFIG_HAVE_GENERIC_HARDIRQS=y

#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_HAVE_SPARSE_IRQ=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y

#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_PREEMPT_RCU is not set
CONFIG_RCU_TRACE=y
CONFIG_RCU_FANOUT=32
CONFIG_RCU_FANOUT_EXACT=y
# CONFIG_RCU_FAST_NO_HZ is not set
CONFIG_TREE_RCU_TRACE=y
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=20
CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
CONFIG_CGROUPS=y
# CONFIG_CGROUP_DEBUG is not set
# CONFIG_CGROUP_NS is not set
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_DEVICE=y
# CONFIG_CPUSETS is not set
# CONFIG_CGROUP_CPUACCT is not set
CONFIG_RESOURCE_COUNTERS=y
CONFIG_CGROUP_MEM_RES_CTLR=y
# CONFIG_CGROUP_PERF is not set
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
# CONFIG_BLK_CGROUP is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
CONFIG_IPC_NS=y
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
CONFIG_NET_NS=y
# CONFIG_SCHED_AUTOGROUP is not set
CONFIG_SCHED_TTWU_QUEUE=y
CONFIG_MM_OWNER=y
CONFIG_SYSFS_DEPRECATED=y
# CONFIG_SYSFS_DEPRECATED_V2 is not set
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
# CONFIG_EXPERT is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_PCSPKR_PLATFORM=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_PERF_USE_VMALLOC=y

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
CONFIG_PERF_COUNTERS=y
CONFIG_DEBUG_PERF_USE_VMALLOC=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_PCI_QUIRKS=y
CONFIG_SLUB_DEBUG=y
CONFIG_COMPAT_BRK=y
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_PROFILING is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
# CONFIG_JUMP_LABEL is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_HAVE_DMA_ATTRS=y
CONFIG_USE_GENERIC_SMP_HELPERS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_HW_BREAKPOINT=y
CONFIG_HAVE_MIXED_BREAKPOINTS_REGS=y
CONFIG_HAVE_USER_RETURN_NOTIFIER=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y

#
# GCOV-based kernel profiling
#
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
# CONFIG_MODULE_UNLOAD is not set
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
# CONFIG_LBDAF is not set
CONFIG_BLK_DEV_BSG=y
CONFIG_BLK_DEV_INTEGRITY=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y CONFIG_IOSCHED_DEADLINE=m
# CONFIG_IOSCHED_CFQ is not set CONFIG_DEFAULT_NOOP=y CONFIG_DEFAULT_IOSCHED="noop"
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set # CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set # CONFIG_INLINE_SPIN_UNLOCK is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set # CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set # CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set # CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set # CONFIG_INLINE_READ_UNLOCK is not set
# CONFIG_INLINE_READ_UNLOCK_BH is not set # CONFIG_INLINE_READ_UNLOCK_IRQ is not set # CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set # CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set # CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set # CONFIG_INLINE_WRITE_UNLOCK is not set
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set # CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set # CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set # CONFIG_MUTEX_SPIN_ON_OWNER is not set CONFIG_FREEZER=y

#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
CONFIG_X86_MPPARSE=y
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_EXTENDED_PLATFORM is not set CONFIG_X86_32_IRIS=m CONFIG_SCHED_OMIT_FRAME_POINTER=y
# CONFIG_PARAVIRT_GUEST is not set CONFIG_NO_BOOTMEM=y
# CONFIG_MEMTEST is not set
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
CONFIG_M686=y
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
# CONFIG_MPENTIUM4 is not set
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MELAN is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MCORE2 is not set
# CONFIG_MATOM is not set
# CONFIG_X86_GENERIC is not set CONFIG_X86_INTERNODE_CACHE_SHIFT=5 CONFIG_X86_CMPXCHG=y
CONFIG_CMPXCHG_LOCAL=y CONFIG_X86_L1_CACHE_SHIFT=5
CONFIG_X86_XADD=y
# CONFIG_X86_PPRO_FENCE is not set CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
CONFIG_X86_CMPXCHG64=y
CONFIG_X86_CMOV=y CONFIG_X86_MINIMUM_CPU_FAMILY=5 CONFIG_X86_DEBUGCTLMSR=y
CONFIG_CPU_SUP_INTEL=y
CONFIG_CPU_SUP_CYRIX_32=y
CONFIG_CPU_SUP_AMD=y
CONFIG_CPU_SUP_CENTAUR=y CONFIG_CPU_SUP_TRANSMETA_32=y CONFIG_CPU_SUP_UMC_32=y
CONFIG_HPET_TIMER=y
CONFIG_DMI=y
# CONFIG_IOMMU_HELPER is not set
# CONFIG_IOMMU_API is not set
CONFIG_NR_CPUS=8
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_PREEMPT_NONE is not set CONFIG_PREEMPT_VOLUNTARY=y
# CONFIG_PREEMPT is not set CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
# CONFIG_X86_MCE is not set
CONFIG_VM86=y
# CONFIG_TOSHIBA is not set
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set CONFIG_MICROCODE=m
# CONFIG_MICROCODE_INTEL is not set
# CONFIG_MICROCODE_AMD is not set CONFIG_MICROCODE_OLD_INTERFACE=y CONFIG_X86_MSR=m
# CONFIG_X86_CPUID is not set
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_HIGHMEM=y
# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set
# CONFIG_ARCH_DMA_ADDR_T_64BIT is not set CONFIG_ARCH_FLATMEM_ENABLE=y CONFIG_ARCH_SPARSEMEM_ENABLE=y CONFIG_ARCH_SELECT_MEMORY_MODEL=y CONFIG_ILLEGAL_POINTER_VALUE=0 CONFIG_SELECT_MEMORY_MODEL=y CONFIG_FLATMEM_MANUAL=y
# CONFIG_SPARSEMEM_MANUAL is not set CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y CONFIG_SPARSEMEM_STATIC=y
CONFIG_HAVE_MEMBLOCK=y CONFIG_PAGEFLAGS_EXTENDED=y CONFIG_SPLIT_PTLOCK_CPUS=999999 CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
# CONFIG_PHYS_ADDR_T_64BIT is not set CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_VIRT_TO_BUS=y
CONFIG_KSM=y
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096 CONFIG_TRANSPARENT_HUGEPAGE=y
# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y CONFIG_HIGHPTE=y CONFIG_X86_CHECK_BIOS_CORRUPTION=y
# CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK is not set CONFIG_X86_RESERVE_LOW=64 CONFIG_MATH_EMULATION=y
CONFIG_MTRR=y
# CONFIG_MTRR_SANITIZER is not set CONFIG_X86_PAT=y
CONFIG_ARCH_USES_PG_UNCACHED=y
# CONFIG_EFI is not set
# CONFIG_SECCOMP is not set CONFIG_CC_STACKPROTECTOR=y
CONFIG_HZ_100=y
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
# CONFIG_CRASH_DUMP is not set CONFIG_PHYSICAL_START=0x1000000 CONFIG_RELOCATABLE=y
CONFIG_X86_NEED_RELOCS=y CONFIG_PHYSICAL_ALIGN=0x1000000 CONFIG_HOTPLUG_CPU=y
# CONFIG_COMPAT_VDSO is not set CONFIG_CMDLINE_BOOL=y
CONFIG_CMDLINE=""
# CONFIG_CMDLINE_OVERRIDE is not set CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y

#
# Power management and ACPI options
#
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_PM_SLEEP=y
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_RUNTIME=y
CONFIG_PM=y
CONFIG_PM_DEBUG=y
# CONFIG_PM_VERBOSE is not set
# CONFIG_PM_ADVANCED_DEBUG is not set
# CONFIG_PM_TEST_SUSPEND is not set
CONFIG_CAN_PM_TRACE=y
CONFIG_PM_TRACE=y
CONFIG_PM_TRACE_RTC=y
CONFIG_ACPI=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_PROCFS_POWER=y
# CONFIG_ACPI_POWER_METER is not set
# CONFIG_ACPI_EC_DEBUGFS is not set
# CONFIG_ACPI_PROC_EVENT is not set
CONFIG_ACPI_AC=m
# CONFIG_ACPI_BATTERY is not set
# CONFIG_ACPI_BUTTON is not set
CONFIG_ACPI_VIDEO=m
CONFIG_ACPI_FAN=m
CONFIG_ACPI_DOCK=y
CONFIG_ACPI_PROCESSOR=m
CONFIG_ACPI_IPMI=m
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_PROCESSOR_AGGREGATOR=m
# CONFIG_ACPI_THERMAL is not set
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
# CONFIG_ACPI_DEBUG is not set
# CONFIG_ACPI_PCI_SLOT is not set
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=m
CONFIG_ACPI_SBS=m
# CONFIG_ACPI_HED is not set
# CONFIG_ACPI_APEI is not set
# CONFIG_SFI is not set
# CONFIG_APM is not set

#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=m
# CONFIG_CPU_FREQ_DEBUG is not set CONFIG_CPU_FREQ_STAT=m
# CONFIG_CPU_FREQ_STAT_DETAILS is not set CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set # CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set # CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set CONFIG_CPU_FREQ_GOV_PERFORMANCE=y CONFIG_CPU_FREQ_GOV_POWERSAVE=m CONFIG_CPU_FREQ_GOV_USERSPACE=m CONFIG_CPU_FREQ_GOV_ONDEMAND=m CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m

#
# CPUFreq processor drivers
#
# CONFIG_X86_PCC_CPUFREQ is not set
# CONFIG_X86_ACPI_CPUFREQ is not set
CONFIG_X86_POWERNOW_K6=m
CONFIG_X86_POWERNOW_K7=m
CONFIG_X86_POWERNOW_K7_ACPI=y
# CONFIG_X86_POWERNOW_K8 is not set
# CONFIG_X86_GX_SUSPMOD is not set
CONFIG_X86_SPEEDSTEP_CENTRINO=m
CONFIG_X86_SPEEDSTEP_CENTRINO_TABLE=y
# CONFIG_X86_SPEEDSTEP_ICH is not set
CONFIG_X86_SPEEDSTEP_SMI=m
# CONFIG_X86_P4_CLOCKMOD is not set
CONFIG_X86_CPUFREQ_NFORCE2=m
# CONFIG_X86_LONGRUN is not set
# CONFIG_X86_LONGHAUL is not set
CONFIG_X86_E_POWERSAVER=m

#

# shared options
#
CONFIG_X86_SPEEDSTEP_LIB=m
# CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK is not set
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
CONFIG_INTEL_IDLE=y

#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_DOMAINS=y
# CONFIG_PCI_CNB20LE_QUIRK is not set
# CONFIG_PCIEPORTBUS is not set
CONFIG_ARCH_SUPPORTS_MSI=y
# CONFIG_PCI_MSI is not set
CONFIG_PCI_DEBUG=y
# CONFIG_PCI_STUB is not set
CONFIG_HT_IRQ=y
CONFIG_PCI_IOV=y
CONFIG_PCI_IOAPIC=y
CONFIG_PCI_LABEL=y
CONFIG_ISA_DMA_API=y
CONFIG_ISA=y
# CONFIG_EISA is not set
CONFIG_MCA=y
CONFIG_MCA_LEGACY=y
CONFIG_MCA_PROC_FS=y
# CONFIG_SCx200 is not set
# CONFIG_OLPC is not set
CONFIG_AMD_NB=y
CONFIG_PCCARD=m
CONFIG_PCMCIA=m
CONFIG_PCMCIA_LOAD_CIS=y
CONFIG_CARDBUS=y

#
# PC-card bridges
#
# CONFIG_YENTA is not set
# CONFIG_PD6729 is not set
CONFIG_I82092=m
CONFIG_I82365=m
CONFIG_TCIC=m
CONFIG_PCMCIA_PROBE=y
CONFIG_PCCARD_NONSTATIC=y
# CONFIG_HOTPLUG_PCI is not set
CONFIG_RAPIDIO=y
CONFIG_RAPIDIO_DISC_TIMEOUT=30
# CONFIG_RAPIDIO_ENABLE_RX_TX_PORTS is not set
# CONFIG_RAPIDIO_TSI57X is not set
# CONFIG_RAPIDIO_CPS_XX is not set
CONFIG_RAPIDIO_TSI568=y
CONFIG_RAPIDIO_CPS_GEN2=y
CONFIG_RAPIDIO_TSI500=y
# CONFIG_RAPIDIO_DEBUG is not set

#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_HAVE_AOUT=y
# CONFIG_BINFMT_AOUT is not set
# CONFIG_BINFMT_MISC is not set
CONFIG_HAVE_ATOMIC_IOMAP=y
CONFIG_HAVE_TEXT_POKE_SMP=y
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=y
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_XFRM_IPCOMP=m
CONFIG_NET_KEY=m
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_IP_FIB_TRIE_STATS=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
# CONFIG_IP_ROUTE_VERBOSE is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
CONFIG_ARPD=y
CONFIG_SYN_COOKIES=y
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_TUNNEL=m
CONFIG_INET_TUNNEL=m
CONFIG_INET_XFRM_MODE_TRANSPORT=m
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
CONFIG_INET_XFRM_MODE_BEET=m
CONFIG_INET_LRO=m
# CONFIG_INET_DIAG is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
CONFIG_NETLABEL=y
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
CONFIG_NETFILTER=y
CONFIG_NETFILTER_DEBUG=y
CONFIG_NETFILTER_ADVANCED=y

#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
# CONFIG_NF_CONNTRACK is not set
# CONFIG_NETFILTER_XTABLES is not set
CONFIG_IP_SET=m
CONFIG_IP_SET_MAX=256
# CONFIG_IP_SET_BITMAP_IP is not set
# CONFIG_IP_SET_BITMAP_IPMAC is not set
# CONFIG_IP_SET_BITMAP_PORT is not set
# CONFIG_IP_SET_HASH_IP is not set
# CONFIG_IP_SET_HASH_IPPORT is not set
CONFIG_IP_SET_HASH_IPPORTIP=m
# CONFIG_IP_SET_HASH_IPPORTNET is not set
# CONFIG_IP_SET_HASH_NET is not set
CONFIG_IP_SET_HASH_NETPORT=m
CONFIG_IP_SET_LIST_SET=m
CONFIG_IP_VS=m
CONFIG_IP_VS_DEBUG=y
CONFIG_IP_VS_TAB_BITS=12

#
# IPVS transport protocol load balancing support
#
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_AH_ESP=y
# CONFIG_IP_VS_PROTO_ESP is not set
CONFIG_IP_VS_PROTO_AH=y
# CONFIG_IP_VS_PROTO_SCTP is not set

#
# IPVS scheduler
#
# CONFIG_IP_VS_RR is not set
# CONFIG_IP_VS_WRR is not set
# CONFIG_IP_VS_LC is not set
CONFIG_IP_VS_WLC=m
CONFIG_IP_VS_LBLC=m
# CONFIG_IP_VS_LBLCR is not set
# CONFIG_IP_VS_DH is not set
# CONFIG_IP_VS_SH is not set
CONFIG_IP_VS_SED=m
CONFIG_IP_VS_NQ=m

#
# IPVS application helper
#

#
# IP: Netfilter Configuration
#
# CONFIG_NF_DEFRAG_IPV4 is not set
CONFIG_IP_NF_QUEUE=m
# CONFIG_IP_NF_IPTABLES is not set
# CONFIG_IP_NF_ARPTABLES is not set

#
# DECnet: Netfilter Configuration
#
# CONFIG_DECNET_NF_GRABULATOR is not set
CONFIG_IP_DCCP=m

#
# DCCP CCIDs Configuration (EXPERIMENTAL)
#
# CONFIG_IP_DCCP_CCID2_DEBUG is not set
# CONFIG_IP_DCCP_CCID3 is not set

#
# DCCP Kernel Hacking
#
CONFIG_IP_DCCP_DEBUG=y
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_MSG is not set
# CONFIG_SCTP_DBG_OBJCNT is not set
CONFIG_SCTP_HMAC_NONE=y
# CONFIG_SCTP_HMAC_SHA1 is not set
# CONFIG_SCTP_HMAC_MD5 is not set
CONFIG_RDS=m
CONFIG_RDS_RDMA=m
CONFIG_RDS_TCP=m
# CONFIG_RDS_DEBUG is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=m
# CONFIG_VLAN_8021Q_GVRP is not set
CONFIG_DECNET=m
# CONFIG_DECNET_ROUTER is not set
CONFIG_LLC=m
# CONFIG_LLC2 is not set
CONFIG_IPX=m
# CONFIG_IPX_INTERN is not set
CONFIG_ATALK=m
# CONFIG_DEV_APPLETALK is not set
# CONFIG_X25 is not set
CONFIG_LAPB=m
CONFIG_ECONET=m
# CONFIG_ECONET_AUNUDP is not set
# CONFIG_ECONET_NATIVE is not set
CONFIG_WAN_ROUTER=m
CONFIG_PHONET=m
CONFIG_IEEE802154=m
# CONFIG_NET_SCHED is not set
CONFIG_DCB=y
# CONFIG_DNS_RESOLVER is not set
# CONFIG_BATMAN_ADV is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
CONFIG_BT=m
CONFIG_BT_L2CAP=y
CONFIG_BT_SCO=y
# CONFIG_BT_RFCOMM is not set
CONFIG_BT_BNEP=m
# CONFIG_BT_BNEP_MC_FILTER is not set
CONFIG_BT_BNEP_PROTO_FILTER=y

#
# Bluetooth device drivers
#
# CONFIG_BT_HCIBTUSB is not set
# CONFIG_BT_HCIUART is not set
# CONFIG_BT_HCIBCM203X is not set
CONFIG_BT_HCIBPA10X=m
CONFIG_BT_HCIBFUSB=m
CONFIG_BT_HCIDTL1=m
# CONFIG_BT_HCIBT3C is not set
CONFIG_BT_HCIBLUECARD=m
CONFIG_BT_HCIBTUART=m
CONFIG_BT_HCIVHCI=m
CONFIG_BT_MRVL=m
# CONFIG_AF_RXRPC is not set
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
CONFIG_WIRELESS_EXT=y
CONFIG_WEXT_CORE=y
CONFIG_WEXT_PROC=y
CONFIG_WEXT_SPY=y
CONFIG_WEXT_PRIV=y
# CONFIG_CFG80211 is not set
# CONFIG_WIRELESS_EXT_SYSFS is not set
CONFIG_LIB80211=m
CONFIG_LIB80211_CRYPT_WEP=m
CONFIG_LIB80211_CRYPT_CCMP=m
CONFIG_LIB80211_CRYPT_TKIP=m
CONFIG_LIB80211_DEBUG=y

#
# CFG80211 needs to be enabled for MAC80211
#
# CONFIG_WIMAX is not set
CONFIG_RFKILL=m
CONFIG_RFKILL_INPUT=y
CONFIG_CAIF=m
# CONFIG_CAIF_DEBUG is not set
CONFIG_CAIF_NETDEV=m
CONFIG_CEPH_LIB=m
CONFIG_CEPH_LIB_PRETTYDEBUG=y

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH=""
# CONFIG_DEVTMPFS is not set
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
CONFIG_FIRMWARE_IN_KERNEL=y
CONFIG_EXTRA_FIRMWARE=""
CONFIG_DEBUG_DRIVER=y
CONFIG_DEBUG_DEVRES=y
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_ARCH_NO_SYSDEV_OPS=y
CONFIG_CONNECTOR=m
# CONFIG_MTD is not set
CONFIG_PARPORT=m
# CONFIG_PARPORT_PC is not set
# CONFIG_PARPORT_GSC is not set
CONFIG_PARPORT_AX88796=m
CONFIG_PARPORT_1284=y
CONFIG_PARPORT_NOT_PC=y
CONFIG_PNP=y
CONFIG_PNP_DEBUG_MESSAGES=y

#
# Protocols
#
CONFIG_ISAPNP=y
CONFIG_PNPBIOS=y
CONFIG_PNPBIOS_PROC_FS=y
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
CONFIG_BLK_DEV_XD=m
CONFIG_BLK_CPQ_DA=y
CONFIG_BLK_CPQ_CISS_DA=m
# CONFIG_CISS_SCSI_TAPE is not set
CONFIG_BLK_DEV_DAC960=m
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_DRBD=m
# CONFIG_DRBD_FAULT_INJECTION is not set
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_SX8=m
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
CONFIG_CDROM_PKTCDVD=m
CONFIG_CDROM_PKTCDVD_BUFFERS=8
CONFIG_CDROM_PKTCDVD_WCACHE=y
# CONFIG_ATA_OVER_ETH is not set
CONFIG_BLK_DEV_HD=y
CONFIG_BLK_DEV_RBD=m
# CONFIG_SENSORS_LIS3LV02D is not set
# CONFIG_MISC_DEVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_TGT=m
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=m
# CONFIG_BLK_DEV_SR_VENDOR is not set
# CONFIG_CHR_DEV_SG is not set
CONFIG_CHR_DEV_SCH=m
CONFIG_SCSI_MULTI_LUN=y
# CONFIG_SCSI_CONSTANTS is not set
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
CONFIG_SCSI_FC_ATTRS=m
CONFIG_SCSI_FC_TGT_ATTRS=y
CONFIG_SCSI_ISCSI_ATTRS=m
CONFIG_SCSI_SAS_ATTRS=m
CONFIG_SCSI_SAS_LIBSAS=m
CONFIG_SCSI_SAS_ATA=y
# CONFIG_SCSI_SAS_HOST_SMP is not set
CONFIG_SCSI_SRP_ATTRS=m
CONFIG_SCSI_SRP_TGT_ATTRS=y
# CONFIG_SCSI_LOWLEVEL is not set
CONFIG_SCSI_LOWLEVEL_PCMCIA=y
# CONFIG_PCMCIA_AHA152X is not set
CONFIG_PCMCIA_FDOMAIN=m
CONFIG_PCMCIA_NINJA_SCSI=m
CONFIG_PCMCIA_QLOGIC=m
CONFIG_PCMCIA_SYM53C500=m
CONFIG_SCSI_DH=m
# CONFIG_SCSI_DH_RDAC is not set
# CONFIG_SCSI_DH_HP_SW is not set
CONFIG_SCSI_DH_EMC=m
CONFIG_SCSI_DH_ALUA=m
CONFIG_SCSI_OSD_INITIATOR=m
# CONFIG_SCSI_OSD_ULD is not set
CONFIG_SCSI_OSD_DPRINT_SENSE=1
# CONFIG_SCSI_OSD_DEBUG is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_VERBOSE_ERROR=y
# CONFIG_ATA_ACPI is not set
# CONFIG_SATA_PMP is not set

#
# Controllers with non-SFF native interface
#
CONFIG_SATA_AHCI=y
# CONFIG_SATA_AHCI_PLATFORM is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
CONFIG_SATA_SIL24=m
CONFIG_ATA_SFF=y

#
# SFF controllers with custom DMA interface
#
CONFIG_PDC_ADMA=m
# CONFIG_SATA_QSTOR is not set
CONFIG_SATA_SX4=m
CONFIG_ATA_BMDMA=y

#
# SATA SFF controllers with BMDMA
#
CONFIG_ATA_PIIX=y
# CONFIG_SATA_MV is not set
CONFIG_SATA_NV=y
CONFIG_SATA_PROMISE=m
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
CONFIG_SATA_SVW=m
# CONFIG_SATA_ULI is not set
CONFIG_SATA_VIA=m
CONFIG_SATA_VITESSE=m

#
# PATA SFF controllers with BMDMA
#
CONFIG_PATA_ALI=m
CONFIG_PATA_AMD=y
# CONFIG_PATA_ARASAN_CF is not set
CONFIG_PATA_ARTOP=m
CONFIG_PATA_ATIIXP=m
# CONFIG_PATA_ATP867X is not set
CONFIG_PATA_CMD64X=m
# CONFIG_PATA_CS5520 is not set
CONFIG_PATA_CS5530=m
CONFIG_PATA_CS5535=m
CONFIG_PATA_CS5536=m
CONFIG_PATA_CYPRESS=m
CONFIG_PATA_EFAR=m
CONFIG_PATA_HPT366=m
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
CONFIG_PATA_HPT3X3=m
# CONFIG_PATA_HPT3X3_DMA is not set
# CONFIG_PATA_IT8213 is not set
CONFIG_PATA_IT821X=m
CONFIG_PATA_JMICRON=m
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
CONFIG_PATA_OLDPIIX=y
# CONFIG_PATA_OPTIDMA is not set
CONFIG_PATA_PDC2027X=m
CONFIG_PATA_PDC_OLD=m
# CONFIG_PATA_RADISYS is not set
CONFIG_PATA_RDC=m
CONFIG_PATA_SC1200=m
# CONFIG_PATA_SCH is not set
CONFIG_PATA_SERVERWORKS=m
CONFIG_PATA_SIL680=m
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
CONFIG_PATA_TRIFLEX=m
CONFIG_PATA_VIA=y
# CONFIG_PATA_WINBOND is not set

#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
CONFIG_PATA_ISAPNP=m
# CONFIG_PATA_MPIIX is not set
CONFIG_PATA_NS87410=m
CONFIG_PATA_OPTI=m
CONFIG_PATA_PCMCIA=m
CONFIG_PATA_QDI=m
CONFIG_PATA_RZ1000=m
CONFIG_PATA_WINBOND_VLB=m

#
# Generic fallback / legacy drivers
#
CONFIG_ATA_GENERIC=m
CONFIG_PATA_LEGACY=m
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
CONFIG_FIREWIRE=m
# CONFIG_FIREWIRE_OHCI is not set
CONFIG_FIREWIRE_SBP2=m
# CONFIG_FIREWIRE_NET is not set
# CONFIG_FIREWIRE_NOSY is not set
# CONFIG_I2O is not set
CONFIG_MACINTOSH_DRIVERS=y
# CONFIG_MAC_EMUMOUSEBTN is not set
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
# CONFIG_BONDING is not set
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
# CONFIG_TUN is not set
# CONFIG_VETH is not set
# CONFIG_NET_SB1000 is not set
CONFIG_ARCNET=m
# CONFIG_ARCNET_1201 is not set
CONFIG_ARCNET_1051=m
# CONFIG_ARCNET_RAW is not set
# CONFIG_ARCNET_CAP is not set
CONFIG_ARCNET_COM90xx=m
# CONFIG_ARCNET_COM90xxIO is not set
# CONFIG_ARCNET_RIM_I is not set
# CONFIG_ARCNET_COM20020 is not set
CONFIG_MII=y
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
# CONFIG_MARVELL_PHY is not set
# CONFIG_DAVICOM_PHY is not set CONFIG_QSEMI_PHY=m
CONFIG_LXT_PHY=m
CONFIG_CICADA_PHY=m
# CONFIG_VITESSE_PHY is not set CONFIG_SMSC_PHY=m
CONFIG_BROADCOM_PHY=m
# CONFIG_BCM63XX_PHY is not set CONFIG_ICPLUS_PHY=m
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set CONFIG_STE10XP=m
CONFIG_LSI_ET1011C_PHY=m
# CONFIG_MICREL_PHY is not set CONFIG_FIXED_PHY=y
# CONFIG_MDIO_BITBANG is not set CONFIG_NET_ETHERNET=y
# CONFIG_HAPPYMEAL is not set CONFIG_SUNGEM=m
CONFIG_CASSINI=m
# CONFIG_NET_VENDOR_3COM is not set CONFIG_LANCE=m
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_ENC28J60 is not set CONFIG_ETHOC=m
# CONFIG_NET_VENDOR_RACAL is not set CONFIG_DNET=m
# CONFIG_NET_TULIP is not set CONFIG_AT1700=m
CONFIG_DEPCA=m
CONFIG_HP100=m
# CONFIG_NET_ISA is not set
# CONFIG_NE2_MCA is not set CONFIG_IBMLANA=m
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
# CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set # CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set # CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set CONFIG_ADAPTEC_STARFIRE=m
# CONFIG_AC3200 is not set
# CONFIG_KSZ884X_PCI is not set CONFIG_APRICOT=m
# CONFIG_B44 is not set
CONFIG_FORCEDETH=y
CONFIG_CS89x0=m
CONFIG_E100=y
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set CONFIG_NE2K_PCI=m
CONFIG_8139CP=m
CONFIG_8139TOO=y
# CONFIG_8139TOO_PIO is not set CONFIG_8139TOO_TUNE_TWISTER=y
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_R6040 is not set
# CONFIG_SIS900 is not set CONFIG_EPIC100=m
# CONFIG_SMSC9420 is not set CONFIG_SUNDANCE=m
# CONFIG_SUNDANCE_MMIO is not set
# CONFIG_TLAN is not set
# CONFIG_KS8851 is not set CONFIG_KS8851_MLL=m
CONFIG_VIA_RHINE=m
CONFIG_VIA_RHINE_MMIO=y
# CONFIG_SC92031 is not set CONFIG_NET_POCKET=y
CONFIG_ATP=m
# CONFIG_DE600 is not set
# CONFIG_DE620 is not set
CONFIG_ATL2=m
CONFIG_NETDEV_1000=y
CONFIG_ACENIC=m CONFIG_ACENIC_OMIT_TIGON_I=y
# CONFIG_DL2K is not set
CONFIG_E1000=m
CONFIG_E1000E=y
CONFIG_IP1000=m
# CONFIG_IGB is not set
# CONFIG_IGBVF is not set
CONFIG_NS83820=m
CONFIG_HAMACHI=m
# CONFIG_YELLOWFIN is not set CONFIG_R8169=m
# CONFIG_SIS190 is not set
CONFIG_SKGE=y
# CONFIG_SKGE_DEBUG is not set
# CONFIG_SKY2 is not set CONFIG_VIA_VELOCITY=m
CONFIG_TIGON3=y
CONFIG_BNX2=m
CONFIG_CNIC=m
CONFIG_QLA3XXX=m
# CONFIG_ATL1 is not set
CONFIG_ATL1E=m
# CONFIG_ATL1C is not set
CONFIG_JME=m
# CONFIG_STMMAC_ETH is not set
# CONFIG_PCH_GBE is not set
# CONFIG_NETDEV_10000 is not set
# CONFIG_TR is not set
CONFIG_WLAN=y
CONFIG_PCMCIA_RAYCS=m
# CONFIG_AIRO is not set
# CONFIG_ATMEL is not set
# CONFIG_AIRO_CS is not set CONFIG_PCMCIA_WL3501=m
# CONFIG_PRISM54 is not set
# CONFIG_USB_ZD1201 is not set CONFIG_HOSTAP=m
# CONFIG_HOSTAP_FIRMWARE is not set
# CONFIG_HOSTAP_PLX is not set
# CONFIG_HOSTAP_PCI is not set
# CONFIG_HOSTAP_CS is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers #

#
# USB Network Adapters
#
CONFIG_USB_CATC=m
CONFIG_USB_KAWETH=m
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
CONFIG_USB_USBNET=m
CONFIG_USB_NET_AX8817X=m
CONFIG_USB_NET_CDCETHER=m
CONFIG_USB_NET_CDC_EEM=m
CONFIG_USB_NET_CDC_NCM=m
CONFIG_USB_NET_DM9601=m
# CONFIG_USB_NET_SMSC75XX is not set
CONFIG_USB_NET_SMSC95XX=m
# CONFIG_USB_NET_GL620A is not set
CONFIG_USB_NET_NET1080=m
CONFIG_USB_NET_PLUSB=m
CONFIG_USB_NET_MCS7830=m
CONFIG_USB_NET_RNDIS_HOST=m
CONFIG_USB_NET_CDC_SUBSET=m
CONFIG_USB_ALI_M5632=y
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
CONFIG_USB_ARMLINUX=y
# CONFIG_USB_EPSON2888 is not set
# CONFIG_USB_KC2190 is not set
CONFIG_USB_NET_ZAURUS=m
# CONFIG_USB_NET_CX82310_ETH is not set
CONFIG_USB_HSO=m
# CONFIG_USB_NET_INT51X1 is not set
CONFIG_USB_CDC_PHONET=m
CONFIG_USB_IPHETH=m
# CONFIG_USB_SIERRA_NET is not set
CONFIG_USB_VL600=m
# CONFIG_NET_PCMCIA is not set
CONFIG_WAN=y
CONFIG_HOSTESS_SV11=m
# CONFIG_COSA is not set
# CONFIG_LANMEDIA is not set
# CONFIG_SEALEVEL_4021 is not set
CONFIG_HDLC=m
CONFIG_HDLC_RAW=m
# CONFIG_HDLC_RAW_ETH is not set
# CONFIG_HDLC_CISCO is not set
# CONFIG_HDLC_FR is not set
# CONFIG_HDLC_PPP is not set
CONFIG_HDLC_X25=m
# CONFIG_PCI200SYN is not set
CONFIG_WANXL=m
# CONFIG_PC300TOO is not set
# CONFIG_N2 is not set
# CONFIG_C101 is not set
CONFIG_FARSYNC=m
CONFIG_DSCC4=m
# CONFIG_DSCC4_PCISYNC is not set
# CONFIG_DSCC4_PCI_RST is not set
CONFIG_DLCI=m
CONFIG_DLCI_MAX=8
# CONFIG_SDLA is not set
# CONFIG_WAN_ROUTER_DRIVERS is not set
CONFIG_SBNI=m
CONFIG_SBNI_MULTILINE=y
CONFIG_IEEE802154_DRIVERS=m
CONFIG_IEEE802154_FAKEHARD=m

#
# CAIF transport drivers
#
# CONFIG_CAIF_TTY is not set
CONFIG_CAIF_SPI_SLAVE=m
CONFIG_CAIF_SPI_SYNC=y
CONFIG_RIONET=m
CONFIG_RIONET_TX_SIZE=128
CONFIG_RIONET_RX_SIZE=128
CONFIG_FDDI=m
CONFIG_DEFXX=m
# CONFIG_DEFXX_MMIO is not set
CONFIG_SKFP=m
# CONFIG_HIPPI is not set
# CONFIG_PLIP is not set
CONFIG_PPP=m
CONFIG_PPP_MULTILINK=y
# CONFIG_PPP_FILTER is not set
# CONFIG_PPP_ASYNC is not set
# CONFIG_PPP_SYNC_TTY is not set
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
# CONFIG_PPP_MPPE is not set
# CONFIG_PPPOE is not set
CONFIG_SLIP=m
CONFIG_SLIP_COMPRESSED=y
CONFIG_SLHC=m
CONFIG_SLIP_SMART=y
CONFIG_SLIP_MODE_SLIP6=y
# CONFIG_NET_FC is not set
CONFIG_NETCONSOLE=y
# CONFIG_NETCONSOLE_DYNAMIC is not set
CONFIG_NETPOLL=y
CONFIG_NETPOLL_TRAP=y
CONFIG_NET_POLL_CONTROLLER=y
# CONFIG_VMXNET3 is not set
CONFIG_ISDN=y
CONFIG_ISDN_I4L=m
# CONFIG_ISDN_PPP is not set
# CONFIG_ISDN_AUDIO is not set

#
# ISDN feature submodules
#
# CONFIG_ISDN_DIVERSION is not set

#
# ISDN4Linux hardware drivers
#

#
# Passive cards
#
CONFIG_ISDN_DRV_HISAX=m

#
# D-channel protocol features
#
CONFIG_HISAX_EURO=y
# CONFIG_DE_AOC is not set
# CONFIG_HISAX_NO_SENDCOMPLETE is not set
CONFIG_HISAX_NO_LLC=y
CONFIG_HISAX_NO_KEYPAD=y
# CONFIG_HISAX_1TR6 is not set
# CONFIG_HISAX_NI1 is not set
CONFIG_HISAX_MAX_CARDS=8

#
# HiSax supported cards
#
CONFIG_HISAX_16_0=y
CONFIG_HISAX_16_3=y
# CONFIG_HISAX_TELESPCI is not set
# CONFIG_HISAX_S0BOX is not set
# CONFIG_HISAX_AVM_A1 is not set
# CONFIG_HISAX_FRITZPCI is not set
CONFIG_HISAX_AVM_A1_PCMCIA=y
# CONFIG_HISAX_ELSA is not set
CONFIG_HISAX_IX1MICROR2=y
CONFIG_HISAX_DIEHLDIVA=y
# CONFIG_HISAX_ASUSCOM is not set
# CONFIG_HISAX_TELEINT is not set
# CONFIG_HISAX_HFCS is not set
CONFIG_HISAX_SEDLBAUER=y
# CONFIG_HISAX_SPORTSTER is not set
CONFIG_HISAX_MIC=y
CONFIG_HISAX_NETJET=y
CONFIG_HISAX_NETJET_U=y
# CONFIG_HISAX_NICCY is not set
# CONFIG_HISAX_ISURF is not set
# CONFIG_HISAX_HSTSAPHIR is not set
# CONFIG_HISAX_BKM_A4T is not set
# CONFIG_HISAX_SCT_QUADRO is not set
# CONFIG_HISAX_GAZEL is not set
# CONFIG_HISAX_HFC_PCI is not set
# CONFIG_HISAX_W6692 is not set
CONFIG_HISAX_HFC_SX=y
CONFIG_HISAX_ENTERNOW_PCI=y
CONFIG_HISAX_DEBUG=y

#
# HiSax PCMCIA card service modules
#
CONFIG_HISAX_SEDLBAUER_CS=m
# CONFIG_HISAX_AVM_A1_CS is not set
# CONFIG_HISAX_TELES_CS is not set

#
# HiSax sub driver modules
#
# CONFIG_HISAX_ST5481 is not set
# CONFIG_HISAX_HFCUSB is not set
CONFIG_HISAX_HFC4S8S=m
# CONFIG_HISAX_FRITZ_PCIPNP is not set

#
# Active cards
#
# CONFIG_ISDN_DRV_ICN is not set
# CONFIG_ISDN_DRV_PCBIT is not set
CONFIG_ISDN_DRV_SC=m
CONFIG_ISDN_DRV_ACT2000=m
# CONFIG_ISDN_CAPI is not set
CONFIG_ISDN_DRV_GIGASET=m
CONFIG_GIGASET_I4L=y
# CONFIG_GIGASET_DUMMYLL is not set
# CONFIG_GIGASET_BASE is not set
CONFIG_GIGASET_M105=m
# CONFIG_GIGASET_M101 is not set
# CONFIG_GIGASET_DEBUG is not set
CONFIG_HYSDN=m
CONFIG_PHONE=m
CONFIG_PHONE_IXJ=m
# CONFIG_PHONE_IXJ_PCMCIA is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
CONFIG_INPUT_POLLDEV=y
# CONFIG_INPUT_SPARSEKMAP is not set

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
# CONFIG_INPUT_MOUSEDEV_PSAUX is not set
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
CONFIG_INPUT_EVDEV=m
CONFIG_INPUT_EVBUG=m

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_LKKBD is not set
CONFIG_KEYBOARD_GPIO=m
# CONFIG_KEYBOARD_GPIO_POLLED is not set
CONFIG_KEYBOARD_TCA6416=m
CONFIG_KEYBOARD_MATRIX=m
CONFIG_KEYBOARD_MAX7359=m
CONFIG_KEYBOARD_MCS=m
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
CONFIG_KEYBOARD_STOWAWAY=m
CONFIG_KEYBOARD_SUNKBD=m
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
CONFIG_INPUT_MISC=y
CONFIG_INPUT_AD714X=m
# CONFIG_INPUT_AD714X_I2C is not set
# CONFIG_INPUT_AD714X_SPI is not set
# CONFIG_INPUT_PCSPKR is not set
# CONFIG_INPUT_WISTRON_BTNS is not set
# CONFIG_INPUT_ATLAS_BTNS is not set
# CONFIG_INPUT_ATI_REMOTE is not set
CONFIG_INPUT_ATI_REMOTE2=m
CONFIG_INPUT_KEYSPAN_REMOTE=m
# CONFIG_INPUT_POWERMATE is not set
# CONFIG_INPUT_YEALINK is not set
CONFIG_INPUT_CM109=m
CONFIG_INPUT_UINPUT=m
CONFIG_INPUT_PCF50633_PMU=m
# CONFIG_INPUT_PCF8574 is not set
CONFIG_INPUT_GPIO_ROTARY_ENCODER=m
# CONFIG_INPUT_PCAP is not set
CONFIG_INPUT_ADXL34X=m
CONFIG_INPUT_ADXL34X_I2C=m
# CONFIG_INPUT_ADXL34X_SPI is not set
CONFIG_INPUT_CMA3000=m
# CONFIG_INPUT_CMA3000_I2C is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PARKBD is not set
CONFIG_SERIO_PCIPS2=m
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
CONFIG_SERIO_PS2MULT=m
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_DEVKMEM is not set

#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_CS=m
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
# CONFIG_SERIAL_8250_FOURPORT is not set
CONFIG_SERIAL_8250_ACCENT=m
CONFIG_SERIAL_8250_BOCA=m
# CONFIG_SERIAL_8250_EXAR_ST16C554 is not set
# CONFIG_SERIAL_8250_HUB6 is not set
# CONFIG_SERIAL_8250_SHARE_IRQ is not set
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_MCA=m

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
CONFIG_SERIAL_MAX3107=m
# CONFIG_SERIAL_MFD_HSU is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
CONFIG_SERIAL_TIMBERDALE=m
CONFIG_SERIAL_ALTERA_JTAGUART=m
CONFIG_SERIAL_ALTERA_UART=m
CONFIG_SERIAL_ALTERA_UART_MAXPORTS=4
CONFIG_SERIAL_ALTERA_UART_BAUDRATE=115200
# CONFIG_SERIAL_IFX6X60 is not set
# CONFIG_SERIAL_PCH_UART is not set
# CONFIG_PRINTER is not set
# CONFIG_PPDEV is not set
CONFIG_IPMI_HANDLER=m
CONFIG_IPMI_PANIC_EVENT=y
# CONFIG_IPMI_PANIC_STRING is not set
# CONFIG_IPMI_DEVICE_INTERFACE is not set
CONFIG_IPMI_SI=m
# CONFIG_IPMI_WATCHDOG is not set
# CONFIG_IPMI_POWEROFF is not set
# CONFIG_HW_RANDOM is not set
CONFIG_NVRAM=m
# CONFIG_DTLK is not set
CONFIG_R3964=m
# CONFIG_APPLICOM is not set
CONFIG_SONYPI=m

#
# PCMCIA character devices
#
CONFIG_SYNCLINK_CS=m
CONFIG_CARDMAN_4000=m
# CONFIG_CARDMAN_4040 is not set
# CONFIG_IPWIRELESS is not set
CONFIG_MWAVE=m
CONFIG_PC8736x_GPIO=m
CONFIG_NSC_GPIO=m
# CONFIG_RAW_DRIVER is not set
CONFIG_HPET=y
# CONFIG_HPET_MMAP is not set
CONFIG_HANGCHECK_TIMER=m
CONFIG_TCG_TPM=y
CONFIG_TCG_TIS=y
# CONFIG_TCG_NSC is not set
CONFIG_TCG_ATMEL=m
# CONFIG_TCG_INFINEON is not set
CONFIG_TELCLOCK=m
CONFIG_DEVPORT=y
# CONFIG_RAMOOPS is not set
CONFIG_I2C=m
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_COMPAT is not set
# CONFIG_I2C_CHARDEV is not set
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y
CONFIG_I2C_SMBUS=m
CONFIG_I2C_ALGOBIT=m
CONFIG_I2C_ALGOPCA=m

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
CONFIG_I2C_ALI15X3=m
CONFIG_I2C_AMD756=m
CONFIG_I2C_AMD8111=m
CONFIG_I2C_I801=m
CONFIG_I2C_ISCH=m
CONFIG_I2C_PIIX4=m
CONFIG_I2C_NFORCE2=m
CONFIG_I2C_SIS5595=m
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# ACPI drivers
#
# CONFIG_I2C_SCMI is not set

#
# I2C system bus drivers (mostly embedded / system-on-chip) #
CONFIG_I2C_GPIO=m
CONFIG_I2C_INTEL_MID=m
# CONFIG_I2C_OCORES is not set CONFIG_I2C_PCA_PLATFORM=m
# CONFIG_I2C_PXA_PCI is not set CONFIG_I2C_SIMTEC=m
CONFIG_I2C_XILINX=m
CONFIG_I2C_EG20T=m

#
# External I2C/SMBus adapter drivers
#
CONFIG_I2C_DIOLAN_U2C=m
CONFIG_I2C_PARPORT=m
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_PCA_ISA is not set
CONFIG_I2C_STUB=m
CONFIG_SCx200_ACB=m
# CONFIG_I2C_DEBUG_CORE is not set
CONFIG_I2C_DEBUG_ALGO=y
CONFIG_I2C_DEBUG_BUS=y
CONFIG_SPI=y
CONFIG_SPI_DEBUG=y
CONFIG_SPI_MASTER=y

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
# CONFIG_SPI_BITBANG is not set
# CONFIG_SPI_BUTTERFLY is not set
# CONFIG_SPI_GPIO is not set
# CONFIG_SPI_LM70_LLP is not set
# CONFIG_SPI_OC_TINY is not set
CONFIG_SPI_PXA2XX=m
CONFIG_SPI_PXA2XX_PCI=y
CONFIG_SPI_TOPCLIFF_PCH=m
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_DESIGNWARE is not set

#
# SPI Protocol Masters
#
CONFIG_SPI_SPIDEV=m
# CONFIG_SPI_TLE62X0 is not set

#
# PPS support
#
# CONFIG_PPS is not set

#
# PPS generators support
#
CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
CONFIG_GPIOLIB=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_SYSFS=y
CONFIG_GPIO_MAX730X=m

#
# Memory mapped GPIO expanders:
#
CONFIG_GPIO_BASIC_MMIO=m
# CONFIG_GPIO_IT8761E is not set
CONFIG_GPIO_SCH=m
CONFIG_GPIO_VX855=m

#
# I2C GPIO expanders:
#
# CONFIG_GPIO_MAX7300 is not set
CONFIG_GPIO_MAX732X=m
CONFIG_GPIO_PCA953X=m
CONFIG_GPIO_PCF857X=m
# CONFIG_GPIO_ADP5588 is not set

#
# PCI GPIO expanders:
#
# CONFIG_GPIO_CS5535 is not set
CONFIG_GPIO_BT8XX=m
CONFIG_GPIO_LANGWELL=y
# CONFIG_GPIO_PCH is not set
CONFIG_GPIO_ML_IOH=m
# CONFIG_GPIO_TIMBERDALE is not set
CONFIG_GPIO_RDC321X=m

#
# SPI GPIO expanders:
#
CONFIG_GPIO_MAX7301=m
CONFIG_GPIO_MCP23S08=m
CONFIG_GPIO_MC33880=m
CONFIG_GPIO_74X164=m

#
# AC97 GPIO expanders:
#

#
# MODULbus GPIO expanders:
#
# CONFIG_GPIO_JANZ_TTL is not set
CONFIG_W1=m
CONFIG_W1_CON=y

#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_MATROX is not set
CONFIG_W1_MASTER_DS2490=m
# CONFIG_W1_MASTER_DS2482 is not set
CONFIG_W1_MASTER_GPIO=m

#
# 1-wire Slaves
#
CONFIG_W1_SLAVE_THERM=m
CONFIG_W1_SLAVE_SMEM=m
# CONFIG_W1_SLAVE_DS2423 is not set
# CONFIG_W1_SLAVE_DS2431 is not set
CONFIG_W1_SLAVE_DS2433=m
CONFIG_W1_SLAVE_DS2433_CRC=y
CONFIG_W1_SLAVE_DS2760=m
# CONFIG_W1_SLAVE_BQ27000 is not set
CONFIG_POWER_SUPPLY=m
CONFIG_POWER_SUPPLY_DEBUG=y
# CONFIG_PDA_POWER is not set
CONFIG_TEST_POWER=m
CONFIG_BATTERY_DS2760=m
CONFIG_BATTERY_DS2782=m
CONFIG_BATTERY_BQ20Z75=m
CONFIG_BATTERY_BQ27x00=m
# CONFIG_BATTERY_BQ27X00_I2C is not set
# CONFIG_BATTERY_BQ27X00_PLATFORM is not set
CONFIG_BATTERY_MAX17040=m
CONFIG_BATTERY_MAX17042=m
# CONFIG_CHARGER_PCF50633 is not set
# CONFIG_CHARGER_ISP1704 is not set
CONFIG_CHARGER_GPIO=m
CONFIG_HWMON=m
CONFIG_HWMON_VID=m
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
# CONFIG_SENSORS_ABITUGURU is not set
CONFIG_SENSORS_ABITUGURU3=m
# CONFIG_SENSORS_AD7414 is not set
CONFIG_SENSORS_AD7418=m
CONFIG_SENSORS_ADCXX=m
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
CONFIG_SENSORS_ADM1029=m
CONFIG_SENSORS_ADM1031=m
CONFIG_SENSORS_ADM9240=m
CONFIG_SENSORS_ADT7411=m
CONFIG_SENSORS_ADT7462=m
CONFIG_SENSORS_ADT7470=m
# CONFIG_SENSORS_ADT7475 is not set
CONFIG_SENSORS_ASC7621=m
# CONFIG_SENSORS_K8TEMP is not set
CONFIG_SENSORS_K10TEMP=m
CONFIG_SENSORS_ASB100=m
CONFIG_SENSORS_ATXP1=m
# CONFIG_SENSORS_DS620 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
CONFIG_SENSORS_F71805F=m
CONFIG_SENSORS_F71882FG=m
CONFIG_SENSORS_F75375S=m
CONFIG_SENSORS_FSCHMD=m
CONFIG_SENSORS_G760A=m
CONFIG_SENSORS_GL518SM=m
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_GPIO_FAN is not set
# CONFIG_SENSORS_CORETEMP is not set
CONFIG_SENSORS_PKGTEMP=m
CONFIG_SENSORS_IBMAEM=m
CONFIG_SENSORS_IBMPEX=m
# CONFIG_SENSORS_IT87 is not set
# CONFIG_SENSORS_JC42 is not set
# CONFIG_SENSORS_LINEAGE is not set
CONFIG_SENSORS_LM63=m
# CONFIG_SENSORS_LM70 is not set
# CONFIG_SENSORS_LM73 is not set
CONFIG_SENSORS_LM75=m
CONFIG_SENSORS_LM77=m
# CONFIG_SENSORS_LM78 is not set
CONFIG_SENSORS_LM80=m
CONFIG_SENSORS_LM83=m
CONFIG_SENSORS_LM85=m
# CONFIG_SENSORS_LM87 is not set
# CONFIG_SENSORS_LM90 is not set
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
CONFIG_SENSORS_LTC4151=m
# CONFIG_SENSORS_LTC4215 is not set
CONFIG_SENSORS_LTC4245=m
CONFIG_SENSORS_LTC4261=m
CONFIG_SENSORS_LM95241=m
# CONFIG_SENSORS_MAX1111 is not set
CONFIG_SENSORS_MAX1619=m
# CONFIG_SENSORS_MAX6639 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_PC87360 is not set
CONFIG_SENSORS_PC87427=m
CONFIG_SENSORS_PCF8591=m
# CONFIG_PMBUS is not set
CONFIG_SENSORS_SHT15=m
CONFIG_SENSORS_SHT21=m
CONFIG_SENSORS_SIS5595=m
CONFIG_SENSORS_SMM665=m
# CONFIG_SENSORS_DME1737 is not set
CONFIG_SENSORS_EMC1403=m
CONFIG_SENSORS_EMC2103=m
# CONFIG_SENSORS_SMSC47M1 is not set
CONFIG_SENSORS_SMSC47M192=m
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_SCH5627 is not set
# CONFIG_SENSORS_ADS1015 is not set
CONFIG_SENSORS_ADS7828=m
# CONFIG_SENSORS_ADS7871 is not set
CONFIG_SENSORS_AMC6821=m
CONFIG_SENSORS_THMC50=m
CONFIG_SENSORS_TMP102=m
# CONFIG_SENSORS_TMP401 is not set
CONFIG_SENSORS_TMP421=m
# CONFIG_SENSORS_VIA_CPUTEMP is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
CONFIG_SENSORS_VT8231=m
CONFIG_SENSORS_W83781D=m
# CONFIG_SENSORS_W83791D is not set
CONFIG_SENSORS_W83792D=m
# CONFIG_SENSORS_W83793 is not set
# CONFIG_SENSORS_W83795 is not set
CONFIG_SENSORS_W83L785TS=m
CONFIG_SENSORS_W83L786NG=m
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
# CONFIG_SENSORS_APPLESMC is not set
# CONFIG_SENSORS_MC13783_ADC is not set

#
# ACPI drivers
#
# CONFIG_SENSORS_ATK0110 is not set
CONFIG_THERMAL=m
CONFIG_THERMAL_HWMON=y
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set

#
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
CONFIG_ACQUIRE_WDT=m
# CONFIG_ADVANTECH_WDT is not set
# CONFIG_ALIM1535_WDT is not set
CONFIG_ALIM7101_WDT=m
CONFIG_F71808E_WDT=m
# CONFIG_SP5100_TCO is not set
# CONFIG_SC520_WDT is not set
# CONFIG_EUROTECH_WDT is not set
CONFIG_IB700_WDT=m
CONFIG_IBMASR=m
CONFIG_WAFER_WDT=m
# CONFIG_I6300ESB_WDT is not set
CONFIG_ITCO_WDT=m
CONFIG_ITCO_VENDOR_SUPPORT=y
CONFIG_IT8712F_WDT=m
CONFIG_IT87_WDT=m
CONFIG_HP_WATCHDOG=m
CONFIG_HPWDT_NMI_DECODING=y
# CONFIG_SC1200_WDT is not set
# CONFIG_PC87413_WDT is not set
# CONFIG_NV_TCO is not set
# CONFIG_60XX_WDT is not set
CONFIG_SBC8360_WDT=m
CONFIG_SBC7240_WDT=m
CONFIG_CPU5_WDT=m
CONFIG_SMSC_SCH311X_WDT=m
CONFIG_SMSC37B787_WDT=m
CONFIG_W83627HF_WDT=m
# CONFIG_W83697HF_WDT is not set
# CONFIG_W83697UG_WDT is not set
CONFIG_W83877F_WDT=m
# CONFIG_W83977F_WDT is not set
# CONFIG_MACHZ_WDT is not set
CONFIG_SBC_EPX_C3_WATCHDOG=m

#
# ISA-based Watchdog Cards
#
# CONFIG_PCWATCHDOG is not set
CONFIG_MIXCOMWD=m
# CONFIG_WDT is not set

#
# PCI-based Watchdog Cards
#
# CONFIG_PCIPCWATCHDOG is not set
CONFIG_WDTPCI=m

#
# USB-based Watchdog Cards
#
CONFIG_USBPCWATCHDOG=m
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_MFD_SUPPORT=y
CONFIG_MFD_CORE=m
CONFIG_MFD_SM501=m
CONFIG_MFD_SM501_GPIO=y
# CONFIG_HTC_PASIC3 is not set
CONFIG_TPS6105X=m
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_SPI is not set
CONFIG_MFD_PCF50633=m
CONFIG_MFD_MC13783=m
CONFIG_MFD_MC13XXX=m
CONFIG_PCF50633_ADC=m
CONFIG_PCF50633_GPIO=m
CONFIG_ABX500_CORE=y
CONFIG_EZX_PCAP=y
# CONFIG_AB8500_CORE is not set
CONFIG_MFD_CS5535=m
CONFIG_MFD_TIMBERDALE=m
CONFIG_LPC_SCH=m
CONFIG_MFD_RDC321X=m
CONFIG_MFD_JANZ_CMODIO=m
CONFIG_MFD_VX855=m
# CONFIG_MFD_WL1273_CORE is not set
CONFIG_REGULATOR=y
# CONFIG_REGULATOR_DEBUG is not set
CONFIG_REGULATOR_DUMMY=y
CONFIG_REGULATOR_FIXED_VOLTAGE=m
# CONFIG_REGULATOR_VIRTUAL_CONSUMER is not set
# CONFIG_REGULATOR_USERSPACE_CONSUMER is not set
# CONFIG_REGULATOR_BQ24022 is not set
# CONFIG_REGULATOR_MAX1586 is not set
# CONFIG_REGULATOR_MAX8649 is not set
# CONFIG_REGULATOR_MAX8660 is not set
# CONFIG_REGULATOR_MAX8952 is not set
CONFIG_REGULATOR_PCF50633=m
CONFIG_REGULATOR_LP3971=m
# CONFIG_REGULATOR_LP3972 is not set
# CONFIG_REGULATOR_PCAP is not set
# CONFIG_REGULATOR_MC13783 is not set
# CONFIG_REGULATOR_MC13892 is not set
# CONFIG_REGULATOR_TPS6105X is not set
CONFIG_REGULATOR_TPS65023=m
CONFIG_REGULATOR_TPS6507X=m
CONFIG_REGULATOR_ISL6271A=m
# CONFIG_REGULATOR_AD5398 is not set
# CONFIG_REGULATOR_TPS6524X is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_AGP is not set
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
CONFIG_VGA_SWITCHEROO=y
CONFIG_DRM=m
CONFIG_DRM_KMS_HELPER=m
CONFIG_DRM_TTM=m
CONFIG_DRM_TDFX=m
# CONFIG_DRM_R128 is not set
CONFIG_DRM_RADEON=m
CONFIG_DRM_MGA=m
# CONFIG_DRM_VIA is not set
# CONFIG_DRM_SAVAGE is not set
CONFIG_STUB_POULSBO=m
CONFIG_VGASTATE=m
CONFIG_VIDEO_OUTPUT_CONTROL=m
CONFIG_FB=m
# CONFIG_FIRMWARE_EDID is not set
CONFIG_FB_DDC=m
# CONFIG_FB_BOOT_VESA_SUPPORT is not set
CONFIG_FB_CFB_FILLRECT=m
CONFIG_FB_CFB_COPYAREA=m
CONFIG_FB_CFB_IMAGEBLIT=m
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
CONFIG_FB_SYS_FILLRECT=m
CONFIG_FB_SYS_COPYAREA=m
CONFIG_FB_SYS_IMAGEBLIT=m
CONFIG_FB_FOREIGN_ENDIAN=y
# CONFIG_FB_BOTH_ENDIAN is not set
# CONFIG_FB_BIG_ENDIAN is not set
CONFIG_FB_LITTLE_ENDIAN=y
CONFIG_FB_SYS_FOPS=m
# CONFIG_FB_WMT_GE_ROPS is not set
CONFIG_FB_DEFERRED_IO=y
CONFIG_FB_SVGALIB=m
# CONFIG_FB_MACMODES is not set
CONFIG_FB_BACKLIGHT=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y

#
# Frame buffer hardware drivers
#
# CONFIG_FB_CIRRUS is not set
CONFIG_FB_PM2=m
# CONFIG_FB_PM2_FIFO_DISCONNECT is not set
CONFIG_FB_CYBER2000=m
CONFIG_FB_CYBER2000_DDC=y
# CONFIG_FB_ARC is not set
# CONFIG_FB_VGA16 is not set
# CONFIG_FB_UVESA is not set
# CONFIG_FB_N411 is not set
# CONFIG_FB_HGA is not set
CONFIG_FB_S1D13XXX=m
# CONFIG_FB_NVIDIA is not set
CONFIG_FB_RIVA=m
# CONFIG_FB_RIVA_I2C is not set
CONFIG_FB_RIVA_DEBUG=y
CONFIG_FB_RIVA_BACKLIGHT=y
# CONFIG_FB_LE80578 is not set
CONFIG_FB_MATROX=m
# CONFIG_FB_MATROX_MILLENIUM is not set
CONFIG_FB_MATROX_MYSTIQUE=y
CONFIG_FB_MATROX_G=y
# CONFIG_FB_MATROX_I2C is not set
# CONFIG_FB_RADEON is not set
CONFIG_FB_ATY128=m
CONFIG_FB_ATY128_BACKLIGHT=y
# CONFIG_FB_ATY is not set
# CONFIG_FB_S3 is not set
# CONFIG_FB_SAVAGE is not set
# CONFIG_FB_SIS is not set
# CONFIG_FB_VIA is not set
CONFIG_FB_NEOMAGIC=m
CONFIG_FB_KYRO=m
# CONFIG_FB_3DFX is not set
CONFIG_FB_VOODOO1=m
CONFIG_FB_VT8623=m
# CONFIG_FB_TRIDENT is not set
CONFIG_FB_ARK=m
CONFIG_FB_PM3=m
# CONFIG_FB_CARMINE is not set
# CONFIG_FB_GEODE is not set
CONFIG_FB_TMIO=m
# CONFIG_FB_TMIO_ACCELL is not set
# CONFIG_FB_SM501 is not set
# CONFIG_FB_UDL is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FB_METRONOME is not set
CONFIG_FB_MB862XX=m
# CONFIG_FB_MB862XX_PCI_GDC is not set
CONFIG_FB_BROADSHEET=m
CONFIG_BACKLIGHT_LCD_SUPPORT=y
# CONFIG_LCD_CLASS_DEVICE is not set
CONFIG_BACKLIGHT_CLASS_DEVICE=m
CONFIG_BACKLIGHT_GENERIC=m
CONFIG_BACKLIGHT_PROGEAR=m
CONFIG_BACKLIGHT_APPLE=m
# CONFIG_BACKLIGHT_SAHARA is not set
# CONFIG_BACKLIGHT_ADP8860 is not set
# CONFIG_BACKLIGHT_PCF50633 is not set

#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
# CONFIG_MDA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=m
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
CONFIG_FONTS=y
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_FONT_6x11=y
CONFIG_FONT_7x14=y
# CONFIG_FONT_PEARL_8x8 is not set
CONFIG_FONT_ACORN_8x8=y
# CONFIG_FONT_MINI_4x6 is not set
CONFIG_FONT_SUN8x16=y
CONFIG_FONT_SUN12x22=y
CONFIG_FONT_10x18=y
# CONFIG_LOGO is not set
# CONFIG_SOUND is not set
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
CONFIG_USB_DEVICE_CLASS=y
CONFIG_USB_DYNAMIC_MINORS=y
CONFIG_USB_SUSPEND=y
# CONFIG_USB_OTG is not set
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB is not set
CONFIG_USB_WUSB_CBAF=m
# CONFIG_USB_WUSB_CBAF_DEBUG is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_OXU210HP_HCD=m
CONFIG_USB_ISP116X_HCD=m
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_ISP1362_HCD is not set
CONFIG_USB_OHCI_HCD=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=y
CONFIG_USB_SL811_HCD=m
# CONFIG_USB_SL811_CS is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HWA_HCD is not set

#
# USB Device Class drivers
#
CONFIG_USB_ACM=m
# CONFIG_USB_PRINTER is not set
CONFIG_USB_WDM=m
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may #

#

# also be needed; see USB_STORAGE Help for more info
#
# CONFIG_USB_STORAGE is not set
CONFIG_USB_UAS=m
# CONFIG_USB_LIBUSUAL is not set

#
# USB Imaging devices
#
CONFIG_USB_MDC800=m
CONFIG_USB_MICROTEK=m

#
# USB port drivers
#
# CONFIG_USB_USS720 is not set
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
CONFIG_USB_EMI62=m
CONFIG_USB_EMI26=m
# CONFIG_USB_ADUTUX is not set
CONFIG_USB_SEVSEG=m
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
CONFIG_USB_CYTHERM=m
CONFIG_USB_IDMOUSE=m
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
CONFIG_USB_SISUSBVGA=m
# CONFIG_USB_SISUSBVGA_CON is not set
CONFIG_USB_LD=m
# CONFIG_USB_TRANCEVIBRATOR is not set
CONFIG_USB_IOWARRIOR=m
# CONFIG_USB_TEST is not set
CONFIG_USB_ISIGHTFW=m
CONFIG_USB_YUREX=m
CONFIG_USB_GADGET=m
CONFIG_USB_GADGET_DEBUG=y
# CONFIG_USB_GADGET_DEBUG_FILES is not set
CONFIG_USB_GADGET_DEBUG_FS=y
CONFIG_USB_GADGET_VBUS_DRAW=2
CONFIG_USB_GADGET_SELECTED=y
CONFIG_USB_GADGET_FUSB300=y
CONFIG_USB_FUSB300=m
# CONFIG_USB_GADGET_R8A66597 is not set
# CONFIG_USB_GADGET_PXA_U2O is not set
# CONFIG_USB_GADGET_M66592 is not set
# CONFIG_USB_GADGET_AMD5536UDC is not set
# CONFIG_USB_GADGET_CI13XXX_PCI is not set
# CONFIG_USB_GADGET_NET2280 is not set
# CONFIG_USB_GADGET_GOKU is not set
# CONFIG_USB_GADGET_LANGWELL is not set
# CONFIG_USB_GADGET_EG20T is not set
# CONFIG_USB_GADGET_DUMMY_HCD is not set
CONFIG_USB_GADGET_DUALSPEED=y
CONFIG_USB_ZERO=m
# CONFIG_USB_ETH is not set
CONFIG_USB_G_NCM=m
# CONFIG_USB_GADGETFS is not set
# CONFIG_USB_FUNCTIONFS is not set
CONFIG_USB_FILE_STORAGE=m
# CONFIG_USB_FILE_STORAGE_TEST is not set
# CONFIG_USB_MASS_STORAGE is not set
CONFIG_USB_G_SERIAL=m
CONFIG_USB_G_PRINTER=m
# CONFIG_USB_CDC_COMPOSITE is not set
# CONFIG_USB_G_NOKIA is not set
# CONFIG_USB_G_MULTI is not set
# CONFIG_USB_G_HID is not set
# CONFIG_USB_G_DBGP is not set

#
# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
CONFIG_USB_GPIO_VBUS=m
CONFIG_NOP_USB_XCEIV=m
# CONFIG_UWB is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
CONFIG_NFC_DEVICES=y
# CONFIG_PN544_NFC is not set
CONFIG_ACCESSIBILITY=y
# CONFIG_A11Y_BRAILLE_CONSOLE is not set
CONFIG_INFINIBAND=m
# CONFIG_INFINIBAND_USER_MAD is not set
# CONFIG_INFINIBAND_USER_ACCESS is not set
CONFIG_INFINIBAND_ADDR_TRANS=y
CONFIG_INFINIBAND_MTHCA=m
CONFIG_INFINIBAND_MTHCA_DEBUG=y
# CONFIG_INFINIBAND_AMSO1100 is not set
CONFIG_INFINIBAND_NES=m
# CONFIG_INFINIBAND_NES_DEBUG is not set
# CONFIG_INFINIBAND_IPOIB is not set
CONFIG_INFINIBAND_SRP=m
CONFIG_INFINIBAND_ISER=m
# CONFIG_EDAC is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_DEBUG=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
# CONFIG_RTC_INTF_PROC is not set
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
CONFIG_RTC_DRV_DS1307=m
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
CONFIG_RTC_DRV_ISL1208=m
CONFIG_RTC_DRV_ISL12022=m
CONFIG_RTC_DRV_X1205=m
# CONFIG_RTC_DRV_PCF8563 is not set
CONFIG_RTC_DRV_PCF8583=m
CONFIG_RTC_DRV_M41T80=m
CONFIG_RTC_DRV_M41T80_WDT=y
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set
CONFIG_RTC_DRV_RX8025=m

#
# SPI RTC drivers
#
CONFIG_RTC_DRV_M41T94=m
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
CONFIG_RTC_DRV_R9701=m
CONFIG_RTC_DRV_RS5C348=m
CONFIG_RTC_DRV_DS3234=m
CONFIG_RTC_DRV_PCF2123=m

#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
CONFIG_RTC_DRV_DS1286=m
CONFIG_RTC_DRV_DS1511=m
# CONFIG_RTC_DRV_DS1553 is not set
CONFIG_RTC_DRV_DS1742=m
CONFIG_RTC_DRV_STK17TA8=m
CONFIG_RTC_DRV_M48T86=m
# CONFIG_RTC_DRV_M48T35 is not set
CONFIG_RTC_DRV_M48T59=m
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
CONFIG_RTC_DRV_RP5C01=m
CONFIG_RTC_DRV_V3020=m
CONFIG_RTC_DRV_PCF50633=m

#
# on-CPU RTC drivers
#
# CONFIG_RTC_DRV_PCAP is not set
CONFIG_RTC_DRV_MC13XXX=m
# CONFIG_DMADEVICES is not set
CONFIG_AUXDISPLAY=y
CONFIG_UIO=m
# CONFIG_UIO_CIF is not set
# CONFIG_UIO_PDRV is not set
CONFIG_UIO_PDRV_GENIRQ=m
CONFIG_UIO_AEC=m
# CONFIG_UIO_SERCOS3 is not set
CONFIG_UIO_PCI_GENERIC=m
CONFIG_UIO_NETX=m
# CONFIG_STAGING is not set
# CONFIG_X86_PLATFORM_DEVICES is not set

#
# Firmware Drivers
#
# CONFIG_EDD is not set
CONFIG_FIRMWARE_MEMMAP=y
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
# CONFIG_DMIID is not set
CONFIG_DMI_SYSFS=m
# CONFIG_ISCSI_IBFT_FIND is not set
CONFIG_SIGMA=m

#
# File systems
#
# CONFIG_EXT2_FS is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_DEFAULTS_TO_ORDERED=y
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_EXT4_FS=m
# CONFIG_EXT4_USE_FOR_EXT23 is not set
# CONFIG_EXT4_FS_XATTR is not set
CONFIG_EXT4_DEBUG=y
CONFIG_JBD=y
CONFIG_JBD_DEBUG=y
CONFIG_JBD2=m
CONFIG_JBD2_DEBUG=y
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
CONFIG_JFS_FS=m
# CONFIG_JFS_POSIX_ACL is not set
# CONFIG_JFS_SECURITY is not set
CONFIG_JFS_DEBUG=y
CONFIG_JFS_STATISTICS=y
# CONFIG_XFS_FS is not set
# CONFIG_OCFS2_FS is not set
CONFIG_BTRFS_FS=m
CONFIG_BTRFS_FS_POSIX_ACL=y
# CONFIG_NILFS2_FS is not set
CONFIG_FS_POSIX_ACL=y
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_FANOTIFY=y
CONFIG_FANOTIFY_ACCESS_PERMISSIONS=y
# CONFIG_QUOTA is not set
# CONFIG_QUOTACTL is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
# CONFIG_JOLIET is not set
CONFIG_ZISOFS=y
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
CONFIG_NTFS_FS=m
# CONFIG_NTFS_DEBUG is not set
# CONFIG_NTFS_RW is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
# CONFIG_TMPFS is not set
# CONFIG_HUGETLBFS is not set
# CONFIG_HUGETLB_PAGE is not set
CONFIG_CONFIGFS_FS=m
# CONFIG_MISC_FILESYSTEMS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
CONFIG_ACORN_PARTITION=y
# CONFIG_ACORN_PARTITION_CUMANA is not set
# CONFIG_ACORN_PARTITION_EESOX is not set
# CONFIG_ACORN_PARTITION_ICS is not set
# CONFIG_ACORN_PARTITION_ADFS is not set
# CONFIG_ACORN_PARTITION_POWERTEC is not set
CONFIG_ACORN_PARTITION_RISCIX=y
# CONFIG_OSF_PARTITION is not set
CONFIG_AMIGA_PARTITION=y
# CONFIG_ATARI_PARTITION is not set
# CONFIG_MAC_PARTITION is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
CONFIG_MINIX_SUBPARTITION=y
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
CONFIG_LDM_PARTITION=y
CONFIG_LDM_DEBUG=y
# CONFIG_SGI_PARTITION is not set
CONFIG_ULTRIX_PARTITION=y
# CONFIG_SUN_PARTITION is not set
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_BASE=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=m
# CONFIG_NLS_CODEPAGE_737 is not set
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
# CONFIG_NLS_CODEPAGE_855 is not set
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
# CONFIG_NLS_CODEPAGE_863 is not set
CONFIG_NLS_CODEPAGE_864=m
# CONFIG_NLS_CODEPAGE_865 is not set
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
# CONFIG_NLS_CODEPAGE_936 is not set
CONFIG_NLS_CODEPAGE_950=m
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
CONFIG_NLS_ISO8859_8=m
# CONFIG_NLS_CODEPAGE_1250 is not set
CONFIG_NLS_CODEPAGE_1251=m
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=m
# CONFIG_NLS_ISO8859_2 is not set
CONFIG_NLS_ISO8859_3=m
# CONFIG_NLS_ISO8859_4 is not set
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
# CONFIG_NLS_KOI8_R is not set
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_UTF8=m
CONFIG_DLM=m
# CONFIG_DLM_DEBUG is not set

#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
# CONFIG_PRINTK_TIME is not set CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4 CONFIG_ENABLE_WARN_DEPRECATED=y CONFIG_ENABLE_MUST_CHECK=y CONFIG_FRAME_WARN=1024
CONFIG_MAGIC_SYSRQ=y
CONFIG_STRIP_ASM_SYMS=y CONFIG_UNUSED_SYMBOLS=y
CONFIG_DEBUG_FS=y
CONFIG_HEADERS_CHECK=y CONFIG_DEBUG_SECTION_MISMATCH=y CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
# CONFIG_LOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set CONFIG_SCHED_DEBUG=y
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_SLUB_DEBUG_ON is not set CONFIG_SLUB_STATS=y
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_LOCK_ALLOC=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_SPARSE_RCU_POINTER is not set CONFIG_LOCKDEP=y
CONFIG_LOCK_STAT=y
CONFIG_DEBUG_LOCKDEP=y CONFIG_DEBUG_SPINLOCK_SLEEP=y CONFIG_DEBUG_LOCKING_API_SELFTESTS=y CONFIG_STACKTRACE=y
# CONFIG_DEBUG_KOBJECT is not set CONFIG_DEBUG_HIGHMEM=y CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_INFO is not set CONFIG_DEBUG_VM=y
CONFIG_DEBUG_VIRTUAL=y CONFIG_DEBUG_WRITECOUNT=y CONFIG_DEBUG_MEMORY_INIT=y
# CONFIG_DEBUG_LIST is not set CONFIG_TEST_LIST_SORT=y
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set CONFIG_ARCH_WANT_FRAME_POINTERS=y CONFIG_FRAME_POINTER=y CONFIG_BOOT_PRINTK_DELAY=y
# CONFIG_RCU_TORTURE_TEST is not set CONFIG_RCU_CPU_STALL_TIMEOUT=60 CONFIG_BACKTRACE_SELF_TEST=m
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y CONFIG_LKDTM=m
# CONFIG_CPU_NOTIFIER_ERROR_INJECT is not set CONFIG_FAULT_INJECTION=y
CONFIG_FAILSLAB=y
# CONFIG_FAIL_PAGE_ALLOC is not set
# CONFIG_FAIL_MAKE_REQUEST is not set
# CONFIG_FAIL_IO_TIMEOUT is not set CONFIG_FAULT_INJECTION_DEBUG_FS=y
# CONFIG_FAULT_INJECTION_STACKTRACE_FILTER is not set CONFIG_LATENCYTOP=y CONFIG_SYSCTL_SYSCALL_CHECK=y
# CONFIG_DEBUG_PAGEALLOC is not set CONFIG_USER_STACKTRACE_SUPPORT=y CONFIG_HAVE_FUNCTION_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y CONFIG_HAVE_DYNAMIC_FTRACE=y CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y CONFIG_HAVE_SYSCALL_TRACEPOINTS=y CONFIG_HAVE_C_RECORDMCOUNT=y CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set # CONFIG_BUILD_DOCSRC is not set CONFIG_DYNAMIC_DEBUG=y
CONFIG_DMA_API_DEBUG=y
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_SAMPLES is not set CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set CONFIG_HAVE_ARCH_KMEMCHECK=y
# CONFIG_KMEMCHECK is not set
# CONFIG_TEST_KSTRTOX is not set CONFIG_STRICT_DEVMEM=y CONFIG_X86_VERBOSE_BOOTUP=y CONFIG_EARLY_PRINTK=y
# CONFIG_EARLY_PRINTK_DBGP is not set
# CONFIG_DEBUG_STACKOVERFLOW is not set CONFIG_DEBUG_STACK_USAGE=y CONFIG_DEBUG_PER_CPU_MAPS=y
# CONFIG_X86_PTDUMP is not set CONFIG_DEBUG_RODATA=y
# CONFIG_DEBUG_RODATA_TEST is not set CONFIG_DEBUG_SET_MODULE_RONX=y CONFIG_DEBUG_NX_TEST=m
CONFIG_DOUBLEFAULT=y
CONFIG_IOMMU_STRESS=y CONFIG_HAVE_MMIOTRACE_SUPPORT=y CONFIG_IO_DELAY_TYPE_0X80=0 CONFIG_IO_DELAY_TYPE_0XED=1 CONFIG_IO_DELAY_TYPE_UDELAY=2 CONFIG_IO_DELAY_TYPE_NONE=3
# CONFIG_IO_DELAY_0X80 is not set
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set CONFIG_IO_DELAY_NONE=y CONFIG_DEFAULT_IO_DELAY_TYPE=3
# CONFIG_DEBUG_BOOT_PARAMS is not set
# CONFIG_CPA_DEBUG is not set CONFIG_OPTIMIZE_INLINING=y

#
# Security options
#
CONFIG_KEYS=y
# CONFIG_TRUSTED_KEYS is not set
# CONFIG_KEYS_DEBUG_PROC_KEYS is not set
CONFIG_SECURITY_DMESG_RESTRICT=y
CONFIG_SECURITY=y
CONFIG_SECURITYFS=y
CONFIG_SECURITY_NETWORK=y
# CONFIG_SECURITY_NETWORK_XFRM is not set
CONFIG_SECURITY_PATH=y
# CONFIG_SECURITY_SELINUX is not set
# CONFIG_SECURITY_SMACK is not set
CONFIG_SECURITY_TOMOYO=y
# CONFIG_SECURITY_APPARMOR is not set
CONFIG_IMA=y
CONFIG_IMA_MEASURE_PCR_IDX=10
CONFIG_IMA_AUDIT=y
CONFIG_DEFAULT_SECURITY_TOMOYO=y
# CONFIG_DEFAULT_SECURITY_DAC is not set
CONFIG_DEFAULT_SECURITY="tomoyo"
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=m
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=m
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_MANAGER_DISABLE_TESTS is not set
CONFIG_CRYPTO_GF128MUL=m
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
CONFIG_CRYPTO_CRYPTD=m
# CONFIG_CRYPTO_AUTHENC is not set
CONFIG_CRYPTO_TEST=m

#
# Authenticated Encryption with Associated Data
#
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=m
CONFIG_CRYPTO_SEQIV=m

#
# Block modes
#
CONFIG_CRYPTO_CBC=m
CONFIG_CRYPTO_CTR=m
# CONFIG_CRYPTO_CTS is not set
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_XTS=m

#
# Hash modes
#
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
CONFIG_CRYPTO_CRC32C=m
CONFIG_CRYPTO_CRC32C_INTEL=m
CONFIG_CRYPTO_GHASH=m
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_MICHAEL_MIC=m
# CONFIG_CRYPTO_RMD128 is not set
CONFIG_CRYPTO_RMD160=m
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=y
CONFIG_CRYPTO_SHA256=m
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
CONFIG_CRYPTO_AES=m
CONFIG_CRYPTO_AES_586=m
# CONFIG_CRYPTO_AES_NI_INTEL is not set
# CONFIG_CRYPTO_ANUBIS is not set
CONFIG_CRYPTO_ARC4=m
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_KHAZAD=m
# CONFIG_CRYPTO_SALSA20 is not set
CONFIG_CRYPTO_SALSA20_586=m
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
CONFIG_CRYPTO_TEA=m
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_TWOFISH_586 is not set

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=m
# CONFIG_CRYPTO_ZLIB is not set
CONFIG_CRYPTO_LZO=m

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_PADLOCK is not set
CONFIG_CRYPTO_DEV_GEODE=m
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
CONFIG_HAVE_KVM=y
# CONFIG_VIRTUALIZATION is not set
# CONFIG_BINARY_PRINTF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_GENERIC_FIND_FIRST_BIT=y
CONFIG_GENERIC_FIND_NEXT_BIT=y
CONFIG_GENERIC_FIND_LAST_BIT=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=m
CONFIG_CRC_T10DIF=y
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=m
CONFIG_AUDIT_GENERIC=y
CONFIG_ZLIB_INFLATE=m
CONFIG_ZLIB_DEFLATE=m
CONFIG_LZO_COMPRESS=m
CONFIG_LZO_DECOMPRESS=m
# CONFIG_XZ_DEC is not set
# CONFIG_XZ_DEC_BCJ is not set
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y
# CONFIG_CPUMASK_OFFSTACK is not set
CONFIG_CPU_RMAP=y
CONFIG_NLATTR=y
CONFIG_LRU_CACHE=m
CONFIG_AVERAGE=y

I started bisecting this, and the two relevant endpoints:

bad: 11c476f: net,rcu: convert call_rcu(prl_entry_destroy_rcu) to kfree
good: 0ee5623f: Linux 2.6.39-rc6

very clearly indicate that this is an RCU regression.

Thanks,

Ingo

This might be the same one Yinghai found:

e59fb3120bec: rcu: Decrease memory-barrier usage based on semi-formal proof

So with the config i sent it's definitely reproducible.

At first sight couldnt this be related not to barriers, but to not setting need_resched() like we did before?

Thanks,

Ingo

Thank you both!!! I had inspected the commit, but missed the fact that the new version refuses to call set_need_resched() if irqs are enabled. :-( The following (untested) patch restores the set_need_resched() operation.

Does this help?

Thanx, Paul

------------------------------------------------------------------------

rcu: Reschedule from dyntick even if irqs are enabled.

Commit e59fb3120bec (rcu: Decrease memory-barrier usage based on semi-formal proof) attempted to optimize by invoking set_need_resched() only when irqs are disabled. This patch restores the prior behavior of invoking set_need_resched() even if irqs are enabled, but leaves the memory-barrier-usage changes untouched.

index 5b0b482..8c490ef 100644
@@ -335,10 +335,9 @@ void rcu_enter_nohz(void)
 	local_irq_restore(flags);
 
 	/* If the interrupt queued a callback, get out of dyntick mode. */
-	if (in_irq() &&
-	    (__get_cpu_var(rcu_sched_data).nxtlist ||
-	     __get_cpu_var(rcu_bh_data).nxtlist ||
-	     rcu_preempt_needs_cpu(smp_processor_id())))
+	if (__get_cpu_var(rcu_sched_data).nxtlist ||
+	    __get_cpu_var(rcu_bh_data).nxtlist ||
+	    rcu_preempt_needs_cpu(smp_processor_id()))
 		set_need_resched();
 }
 

Btw., in hindsight, e59fb3120bec was a tad big, which made analysis harder.

Would it have been possible to split it in two, one for the movement of the notifiers, the other for the barrier changes?

That way the bisection would have fingered the movement commit. Or so.

No, unfortunately not, the long delay is still there:

device: 'ttyS0': device_add
PM: Adding info for No Bus:ttyS0

INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 1, t=6002 jiffies)

Thanks,

Ingo

In hindsight, that certainly would have been better.

I was afraid of that...

On the off-chance that moving the memory barriers was at fault, the following patch restores all of them that don't have in situ replacements. Grasping at straws, admittedly.

Thanx, Paul

------------------------------------------------------------------------

index 8c490ef..a4a2ef0 100644
@@ -1449,10 +1449,12 @@ __rcu_process_callbacks(struct rcu_state *rsp, struct rcu_data *rdp)
  */
 static void rcu_process_callbacks(void)
 {
+	smp_mb();
 	__rcu_process_callbacks(&rcu_sched_state,
 				&__get_cpu_var(rcu_sched_data));
 	__rcu_process_callbacks(&rcu_bh_state, &__get_cpu_var(rcu_bh_data));
 	rcu_preempt_process_callbacks();
+	smp_mb();
 
 	/* If we are last CPU on way to dyntick-idle mode, accelerate it. */
 	rcu_needs_cpu_flush();

This is the Linux kernel and we *can* turn back the clock!

Well, the nice thing is that we really do not have to grasp at straws, and even while we have no good ideas we can debug this *much* better.

Could you please do a simple test-tree that does has 3 commits:

first one reverts the offending commit
second one applies the barrier part of it
this one applies the need_resched part of it

( You can do even more finegrained steps, if you find harmless-looking bits of
it that can be applied separately! )

Note, the important thing is that the tree should be a 'null pull' - i.e. the revert plus the patches applied will not change anything in core/rcu.

Obviously it would be nice if each step built fine - no need to boot test each step as long as you are reasonably sure it will boot fine.

Then i could take my reproducer and come up with a very precise bisection result for you, with just a couple of minutes time spent on testing. One of the commits after the revert will trigger the hang/slowdown.

My prediction is that we will be much wiser after that! :-)

Thanks,

Ingo

Yay for source-code control systems in general and git in particular! ;-)

I will put this together!

In the meantime, would you be willing to try out the patch at
https://lkml.org/lkml/2011/5/14/89? This patch helped out Yinghai in several configurations.

Thanx, Paul

Wasn't this the one i tested - or is it a new iteration?

I'll try it in any case.

If the bug is fixed for good then we can learn no more from it and then i'd suggest for you to not waste much time with a more finegrained queue :-)

Thanks,

Ingo

oh, this was a new iteration, mea culpa!

And yes, it solves all problems for me as well. Mind pushing it as a fix? :-)

Thanks,

Ingo

FYI, i am also getting the warning below with a defconfig.

Ingo

initcall init_per_zone_wmark_min+0x0/0x5b returned 0 after 41 usecs calling kswapd_init+0x0/0x1d @ 1

------------[ cut here ]------------
WARNING: at kernel/rcutree.c:364 rcu_enter_nohz+0x4f/0x60()
Hardware name: System Product Name
Modules linked in:
Pid: 0, comm: swapper Not tainted 2.6.39-rc7-tip-03260-gb177656-dirty #126707
Call Trace:
 [<c13974b6>] ? printk+0x18/0x1a
 [<c1038f0d>] warn_slowpath_common+0x6d/0xa0
 [<c1089bdf>] ? rcu_enter_nohz+0x4f/0x60
 [<c1089bdf>] ? rcu_enter_nohz+0x4f/0x60
 [<c1038f5d>] warn_slowpath_null+0x1d/0x20
 [<c1089bdf>] rcu_enter_nohz+0x4f/0x60
 [<c10639ca>] tick_nohz_stop_sched_tick+0x22a/0x470
 [<c1001685>] cpu_idle+0x65/0xe0
 [<c137d789>] rest_init+0xa1/0xa8
 [<c137d6e8>] ? reciprocal_value+0x48/0x48
 [<c156a6ef>] start_kernel+0x303/0x30b
 [<c156a1fd>] ? obsolete_checksetup+0x95/0x95
 [<c156a067>] i386_start_kernel+0x67/0x6d
---[ end trace fe4ebffb2b8ff187 ]---
initcall kswapd_init+0x0/0x1d returned 0 after 70614 usecs
calling  extfrag_debug_init+0x0/0x78 @ 1
initcall extfrag_debug_init+0x0/0x78 returned 0 after 79 usecs

Yep, this is me whining that rcu_enter_nohz() was called before the irq nesting count (->dynticks_nesting) had dropped to zero. In other words, either I am mis-counting interrupts or we entered some irq handler and then somehow never left it, but still managed to get to process-level execution. Most likely that I am miscounting somehow.

I suppose that I could remove the WARN_ON_ONCE() and pretend that all was well, but... ;-)

Thanx, Paul

Actually, your test did prove something very interesting. I have been suspecting NMIs, but since the patch you just tested commented out rcu_nmi_enter() and rcu_nmi_exit() completely, we know that there is some bug outside of these two functions. So if I am miscounting nesting levels, I must be doing soe in rcu_enter_nohz(), rcu_exit_nohz(), rcu_irq_enter(), or rcu_irq_exit(). Or some combination of those four.

Thanx, Paul

;-)

Unfortunately, the only reason I can see that it works is (1) there is some obscure bug in my code or (2) someone somewhere is failing to call irq_exit() on some interrupt-exit path. Much as I might be tempted to paper this one over, I believe that we do need to find whatever the underlying bug is.

Oh, yes, there is option (3) as well: maybe if an interrupt deschedules a process, the final irq_exit() is omitted in favor of rcu_enter_nohz()? But I couldn't see any evidence of this in my admittedly cursory scan of the x86 interrupt-handling code.

So until I learn differently, I am assuming that each and every irq_enter() has a matching call to irq_exit(), and that rcu_enter_nohz() is called after the final irq_exit() of a given burst of interrupts.

If my assumptions are mistaken, please do let me know!

Thanx, Paul

About 2), I believe that such an unpairing would have been detected before your whole patchset was merged.
For example if an interrupt failed to call rcu_irq_exit(), we would have found cases where we have:

rcu_enter_nohz()
<irq>

	rcu_irq_enter()

</irq>
rcu_exit_nohz()

And then that last call would trigger "WARN_ON_ONCE(!(rdtp->dynticks & 0x1))".

But may be there was a patch in your set that touched one of these rcu_irq_... callsites.

About 3), it shouldn't happen because preempt_schedule_irq() is called in the exit path of the low level interrupt handler. rcu_exit_irq() is called from the higher level, before resuming to the low level.

That said there might be something nasty that the old checks in the QS APIs were missing.

I think it would be nice to add some checks in rcu-lockdep inside rcu_read_lock()/rcu_dereference() to ensure rdp->dynticks is not even, ie that we are not in an extended qs. That's something I planned to add for my next nohz tasks patchset version, because I bring more dance with the extended quiescent state, but given the problems we are facing today, it may be better sooner.

So it would be nice to have a trace of the calls to rcu_irq_*() / rcu_*_nohz() before the unpairing happened.

I have tried to reproduce it but couldn't trigger anything.

So it would be nice if Yinghai can test the patch below, since he was able to trigger the warning.

This is essentially Paul's patch but with stacktrace of the calls recorded. Then the whole trace is dumped on the console when one of the WARN_ON_ONCE sanity check is positive. Beware as the trace will be dumped everytime WARN_ON_ONCE() is positive. So the first dump is enough, you can ignore the rest.

This requires CONFIG_TRACING. May be a good thing to boot with "ftrace=nop" parameter, so that ftrace will set up a long enough buffer to have an interesting trace.

PS: the first check in rcu_nmi_enter() doesn't seem to make sense.

index 5616b17..a4e6d1b 100644
@@ -316,24 +316,23 @@ static int rcu_implicit_offline_qs(struct rcu_data *rdp)
  * critical sections can occur in irq handlers in nohz mode, a possibility
  * handled by rcu_irq_enter() and rcu_irq_exit()).
  */
-void rcu_enter_nohz(void)
+void __rcu_enter_nohz(void)
 {
-	unsigned long flags;
 	struct rcu_dynticks *rdtp;
 
-	local_irq_save(flags);
 	rdtp = &__get_cpu_var(rcu_dynticks);
+	WARN_ON_ONCE(rdtp->dynticks_nesting <= 0);
 	if (--rdtp->dynticks_nesting) {
-		local_irq_restore(flags);
+		if (WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)))
+			ftrace_dump(DUMP_ORIG);
 		return;
 	}
 	/* CPUs seeing atomic_inc() must see prior RCU read-side crit sects */
 	smp_mb__before_atomic_inc();  /* See above. */
 	atomic_inc(&rdtp->dynticks);
 	smp_mb__after_atomic_inc();  /* Force ordering with next sojourn. */
-	WARN_ON_ONCE(atomic_read(&rdtp->dynticks) & 0x1);
-	local_irq_restore(flags);
-
+	if (WARN_ON_ONCE(atomic_read(&rdtp->dynticks) & 0x1))
+		ftrace_dump(DUMP_ORIG);
 	/* If the interrupt queued a callback, get out of dyntick mode. */
 	if (in_irq() &&
 	    (__get_cpu_var(rcu_sched_data).nxtlist ||

@@ -342,28 +341,57 @@ void rcu_enter_nohz(void)
 		set_need_resched();
 }
 
+void rcu_enter_nohz(void)
+{
+	unsigned long flags;
+	struct rcu_dynticks *rdtp;
+
+	local_irq_save(flags);
+	trace_dump_stack();
+	rdtp = &__get_cpu_var(rcu_dynticks);
+	if (WARN_ON_ONCE(rdtp->dynticks_nesting != 1))
+		ftrace_dump(DUMP_ORIG);
+	rdtp->dynticks_nesting = 1;
+	__rcu_enter_nohz();
+	local_irq_restore(flags);
+}
+
 /*
  * rcu_exit_nohz - inform RCU that current CPU is leaving nohz
  *
  * Exit nohz mode, in other words, -enter- the mode in which RCU
  * read-side critical sections normally occur.
  */
-void rcu_exit_nohz(void)
+void __rcu_exit_nohz(void)
 {
-	unsigned long flags;
 	struct rcu_dynticks *rdtp;
 
-	local_irq_save(flags);
 	rdtp = &__get_cpu_var(rcu_dynticks);
 	if (rdtp->dynticks_nesting++) {
-		local_irq_restore(flags);
+		if (WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)))
+			ftrace_dump(DUMP_ORIG);
 		return;
 	}
 	smp_mb__before_atomic_inc();  /* Force ordering w/previous sojourn. */
 	atomic_inc(&rdtp->dynticks);
 	/* CPUs seeing atomic_inc() must see later RCU read-side crit sects */
 	smp_mb__after_atomic_inc();  /* See above. */
-	WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1));
+	if (WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)))
+		ftrace_dump(DUMP_ORIG);
+}
+
+void rcu_exit_nohz(void)
+{
+	unsigned long flags;
+	struct rcu_dynticks *rdtp;
+
+	local_irq_save(flags);
+	trace_dump_stack();
+	rdtp = &__get_cpu_var(rcu_dynticks);
+	if (WARN_ON_ONCE(rdtp->dynticks_nesting != 0))
+		ftrace_dump(DUMP_ORIG);
+	rdtp->dynticks_nesting = 0;
+	__rcu_exit_nohz();
 	local_irq_restore(flags);
 }
 

@@ -378,15 +406,21 @@ void rcu_nmi_enter(void)
 {
 	struct rcu_dynticks *rdtp = &__get_cpu_var(rcu_dynticks);
 
+	trace_dump_stack();
+
 	if (rdtp->dynticks_nmi_nesting == 0 &&
-	    (atomic_read(&rdtp->dynticks) & 0x1))
+	    (atomic_read(&rdtp->dynticks) & 0x1)) {
+		if (WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)))
+			ftrace_dump(DUMP_ORIG);
 		return;
+	}
 	rdtp->dynticks_nmi_nesting++;
 	smp_mb__before_atomic_inc();  /* Force delay from prior write. */
 	atomic_inc(&rdtp->dynticks);
 	/* CPUs seeing atomic_inc() must see later RCU read-side crit sects */
 	smp_mb__after_atomic_inc();  /* See above. */
-	WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1));
+	if (WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)))
+		ftrace_dump(DUMP_ORIG);
 }
 
 /**

@@ -400,14 +434,20 @@ void rcu_nmi_exit(void)
 {
 	struct rcu_dynticks *rdtp = &__get_cpu_var(rcu_dynticks);
 
+	trace_dump_stack();
+
 	if (rdtp->dynticks_nmi_nesting == 0 ||
-	    --rdtp->dynticks_nmi_nesting != 0)
+	    --rdtp->dynticks_nmi_nesting != 0) {
+		if (WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1)))
+			ftrace_dump(DUMP_ORIG);
 		return;
+	}
 	/* CPUs seeing atomic_inc() must see prior RCU read-side crit sects */
 	smp_mb__before_atomic_inc();  /* See above. */
 	atomic_inc(&rdtp->dynticks);
 	smp_mb__after_atomic_inc();  /* Force delay to next write. */
-	WARN_ON_ONCE(atomic_read(&rdtp->dynticks) & 0x1);
+	if (WARN_ON_ONCE(atomic_read(&rdtp->dynticks) & 0x1))
+		ftrace_dump(DUMP_ORIG);
 }
 
 /**

@@ -418,7 +458,12 @@ void rcu_nmi_exit(void)
  */
 void rcu_irq_enter(void)
 {
-	rcu_exit_nohz();
+	unsigned long flags;
+
+	local_irq_save(flags);
+	trace_dump_stack();
+	__rcu_exit_nohz();
+	local_irq_restore(flags);
 }
 
 /**

@@ -430,7 +475,12 @@ void rcu_irq_enter(void)
  */
 void rcu_irq_exit(void)
 {
-	rcu_enter_nohz();
+	unsigned long flags;
+
+	local_irq_save(flags);
+	trace_dump_stack();
+	__rcu_enter_nohz();
+	local_irq_restore(flags);
 }
 
 #ifdef CONFIG_SMP

Very cool, thank you!!! I was going to do something like this next, but given my lack of familiarity with tracing, your patch looks much nicer than mine would have been.

It applies fine on top of tip/core/rcu and builds OK. I cannot reproduce the problem, either, so I am hoping that either Yinghai or Ingo can run this, and hopefully doing so will provide some enlightenment.

I have pushed this as:

git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git diag.2011.05.16b

I also #ifdefed out the bodies of rcu_nmi_enter() and rcu_nmi_exit() to match the earlier patches.

Here is what it is doing:

o rdtp->dynticks_nmi_nesting == 0:

Is this is the first-level NMI? In theory this should always be true, but I don't trust NMIs to mask each other. I have seen many systems where NMIs could interrupt other NMIs.

The idea is that if we already recorded one level of NMI, we had better record them all so we can figure out when we exit the last level of NMI handler.

o atomic_read(&rdtp->dynticks) & 0x1):

Did the NMI interrupt a non-dyntick code segment? If we did, then there is no need to tell RCU anything -- RCU is already paying attention to this CPU anyway due to the fact that the interrupted code segment was not in dyntick mode.

As for the check on rcu_nmi_exit():

o rdtp->dynticks_nmi_nesting == 0:

We didn't record the corresponding entry to the NMI handler, so we had better not record the exit.

o --rdtp->dynticks_nmi_nesting != 0:

	We are still nested in a NMI handler, so decrement the nesting
	count, but don't mess with rdtp->dynticks.

And yes, I do need some comments. Or maybe to rewrite these in a less-confusing form. LIke you, I decided that these were incorrect several times over the past few days. So even if my analysis above turns out to be correct, some change is needed, a comment at the very least.

But I also know that there is at least one problem outside of rcu_nmi_enter() and rcu_nmi_exit() because Ingo verified that he hits the problem even with the bodies of rcu_nmi_enter() and rcu_nmi_exit() ifdefed out.

Again, thank you for adding the tracing!

In fact I was rather referring to your last added check:

	if (rdtp->dynticks_nmi_nesting == 0 &&

- (atomic_read(&rdtp->dynticks) & 0x1))
+ (atomic_read(&rdtp->dynticks) & 0x1)) {
+ WARN_ON_ONCE(!(atomic_read(&rdtp->dynticks) & 0x1));
return;
+ }

No problem, I hope it will work as I couldn't test it myself.

Me too!

Thanx, Paul

with this patches if the kernel is compiled from opensuse 11.3 no delay anymore, but have one warning:

[   82.895182] ------------[ cut here ]------------
[   82.895189] WARNING: at kernel/rcutree.c:352 rcu_enter_nohz+0x49/0x8b()
[   82.895193] Switched to NOHz mode on CPU #90
[   82.895199] Switched to NOHz mode on CPU #8
[   82.895202] Modules linked in:
[   82.895206] Switched to NOHz mode on CPU #28
[   82.895211] Pid: 0, comm: swapper Not tainted 2.6.39-rc7-tip-yh-05234-g3a108a0-dirty #1016
[   82.895213] Call Trace:
[   82.895233]  [<ffffffff81080144>] warn_slowpath_common+0x85/0x9d
[   82.895238]  [<ffffffff81080176>] warn_slowpath_null+0x1a/0x1c
[   82.895242]  [<ffffffff810d32cc>] rcu_enter_nohz+0x49/0x8b
[   82.895250]  [<ffffffff810ab121>] tick_nohz_stop_sched_tick+0x27d/0x366
[   82.895255]  [<ffffffff810391bc>] cpu_idle+0x7a/0xcc
[   82.895261]  [<ffffffff81bda6e3>] rest_init+0xb7/0xbe
[   82.895266]  [<ffffffff81bda62c>] ? csum_partial_copy_generic+0x16c/0x16c
[   82.895272]  [<ffffffff82742e39>] start_kernel+0x3b2/0x3bd
[   82.895276]  [<ffffffff827422cc>] x86_64_start_reservations+0x9c/0xa0
[   82.895281]  [<ffffffff827424a8>] x86_64_start_kernel+0x1d8/0x1e3
[   82.895290] ---[ end trace 2cfc591bf7de931f ]---
[   82.895310] Switched to NOHz mode on CPU #72
[   82.895315] Dumping ftrace buffer:
[   82.895328] ---------------------------------
[   82.895340] CPU:0 [LOST 35328 EVENTS]
[   82.895341]   <idle>-0       0d... 82735399us : Unknown type 4
[   82.895347]   <idle>-0       0dN.. 82735431us : Unknown type 4
[   82.895353]   <idle>-0       0d... 82739390us : Unknown type 4
[   82.895358]   <idle>-0       0dN.. 82739415us : Unknown type 4
[   82.895364]   <idle>-0       0d... 82743384us : Unknown type 4
[   82.895369]   <idle>-0       0dN.. 82743408us : Unknown type 4
[   82.895375]   <idle>-0       0d... 82747376us : Unknown type 4
[   82.895379] Switched to NOHz mode on CPU #53
[   82.895385]   <idle>-0       0dN.. 82747403us : Unknown type 4
[   82.895390]   <idle>-0       0d... 82751370us : Unknown type 4
[   82.895395]   <idle>-0       0dN.. 82751391us : Unknown type 4
[   82.895400] Switched to NOHz mode on CPU #60
[   82.895405]   <idle>-0       0d... 82755364us : Unknown type 4
[   82.895411]   <idle>-0       0dN.. 82755386us : Unknown type 4
[   82.895416]   <idle>-0       0d... 82759355us : Unknown type 4
[   82.895421]   <idle>-0       0dN.. 82759378us : Unknown type 4
[   82.895428] Switched to NOHz mode on CPU #102
[   82.895431]   <idle>-0       0d... 82763350us : Unknown type 4
[   82.895436]   <idle>-0       0dN.. 82763372us : Unknown type 4
[   82.895441]   <idle>-0       0d... 82767341us : Unknown type 4
[   82.895448] Switched to NOHz mode on CPU #155
[   82.895453]   <idle>-0       0dN.. 82767364us : Unknown type 4
[   82.895459]   <idle>-0       0d... 82771334us : Unknown type 4
[   82.895464]   <idle>-0       0dN.. 82771357us : Unknown type 4
[   82.895469]   <idle>-0       0d... 82775328us : Unknown type 4
[   82.895474]   <idle>-0       0dN.. 82775355us : Unknown type 4
[   82.895480]   <idle>-0       0d... 82779321us : Unknown type 4
[   82.895485]   <idle>-0       0dN.. 82779345us : Unknown type 4
[   82.895490]   <idle>-0       0d... 82783313us : Unknown type 4
[   82.895495]   <idle>-0       0dN.. 82783340us : Unknown type 4
[   82.895501]   <idle>-0       0d... 82787308us : Unknown type 4
[   82.895506]   <idle>-0       0dN.. 82787331us : Unknown type 4
[   82.895511]   <idle>-0       0d... 82791300us : Unknown type 4
[   82.895516]   <idle>-0       0dN.. 82791322us : Unknown type 4
[   82.895522]   <idle>-0       0d... 82795293us : Unknown type 4
[   82.895527]   <idle>-0       0dN.. 82795320us : Unknown type 4
[   82.895532]   <idle>-0       0d... 82799287us : Unknown type 4
[   82.895537]   <idle>-0       0dN.. 82799310us : Unknown type 4
[   82.895542]   <idle>-0       0d... 82803279us : Unknown type 4
[   82.895547]   <idle>-0       0dN.. 82803302us : Unknown type 4
[   82.895552]   <idle>-0       0d... 82807272us : Unknown type 4
[   82.895558]   <idle>-0       0dN.. 82807294us : Unknown type 4
[   82.895563]   <idle>-0       0d... 82811264us : Unknown type 4
[   82.895568]   <idle>-0       0dN.. 82811288us : Unknown type 4
[   82.895573]   <idle>-0       0d... 82815258us : Unknown type 4
[   82.895578]   <idle>-0       0dN.. 82815281us : Unknown type 4
[   82.895583]   <idle>-0       0d... 82819250us : Unknown type 4
[   82.895588]   <idle>-0       0dN.. 82819277us : Unknown type 4
[   82.895594]   <idle>-0       0d... 82823244us : Unknown type 4
[   82.895599]   <idle>-0       0dN.. 82823266us : Unknown type 4
[   82.895604]   <idle>-0       0d... 82827237us : Unknown type 4
[   82.895609]   <idle>-0       0dN.. 82827261us : Unknown type 4
[   82.895615]   <idle>-0       0d... 82831230us : Unknown type 4
[   82.895620]   <idle>-0       0dN.. 82831250us : Unknown type 4
[   82.895625]   <idle>-0       0d... 82835223us : Unknown type 4
[   82.895631]   <idle>-0       0dN.. 82835249us : Unknown type 4
[   82.895635] Switched to NOHz mode on CPU #54
[   82.895640]   <idle>-0       0d... 82839217us : Unknown type 4
[   82.895645]   <idle>-0       0dN.. 82839243us : Unknown type 4
[   82.895651]   <idle>-0       0d... 82843208us : Unknown type 4
[   82.895656]   <idle>-0       0dN.. 82843231us : Unknown type 4
[   82.895661]   <idle>-0       0d... 82847201us : Unknown type 4
[   82.895666]   <idle>-0       0dN.. 82847224us : Unknown type 4
[   82.895671]   <idle>-0       0d... 82851195us : Unknown type 4
[   82.895677]   <idle>-0       0dN.. 82851219us : Unknown type 4
[   82.895682]   <idle>-0       0d... 82855188us : Unknown type 4
[   82.895686] Switched to NOHz mode on CPU #42
[   82.895693] Switched to NOHz mode on CPU #46
[   82.895699] Switched to NOHz mode on CPU #49
[   82.895705]   <idle>-0       0dN.. 82855213us : Unknown type 4
[   82.895709] Switched to NOHz mode on CPU #109
[   82.895715] Switched to NOHz mode on CPU #111
[   82.895720]   <idle>-0       0d... 82859183us : Unknown type 4
[   82.895724] Switched to NOHz mode on CPU #101
[   82.895729]   <idle>-0       0dN.. 82859211us : Unknown type 4
[   82.895733] Switched to NOHz mode on CPU #98
[   82.895739] Switched to NOHz mode on CPU #96
[   82.895744]   <idle>-0       0d... 82863174us : Unknown type 4
[   82.895749]   <idle>-0       0dN.. 82863198us : Unknown type 4
[   82.895754]   <idle>-0       0d... 82867167us : Unknown type 4
[   82.895759]   <idle>-0       0dN.. 82867191us : Unknown type 4
[   82.895765]   <idle>-0       0d... 82871161us : Unknown type 4
[   82.895770]   <idle>-0       0dN.. 82871185us : Unknown type 4
[   82.895775]   <idle>-0       0d... 82875153us : Unknown type 4
[   82.895780] Switched to NOHz mode on CPU #17
[   82.895784]   <idle>-0       0dN.. 82875174us : Unknown type 4
[   82.895790] Switched to NOHz mode on CPU #14
[   82.895793]   <idle>-0       0d... 82879147us : Unknown type 4
[   82.895799] Switched to NOHz mode on CPU #3
[   82.895801]   <idle>-0       0dN.. 82879171us : Unknown type 4
[   82.895806]   <idle>-0       0d... 82883139us : Unknown type 4
[   82.895811]   <idle>-0       0dN.. 82883164us : Unknown type 4
[   82.895814] Switched to NOHz mode on CPU #4
[   82.895817]   <idle>-0       0d... 82887132us : Unknown type 4
[   82.895822] Switched to NOHz mode on CPU #153
[   82.895827]   <idle>-0       0dN.. 82887154us : Unknown type 4
[   82.895833]   <idle>-0       0d... 82891124us : Unknown type 4
[   82.895838]   <idle>-0       0dN.. 82891148us : Unknown type 4
[   82.895843]   <idle>-0       0d... 82893612us : Unknown type 4
[   82.895848]   <idle>-0       0d... 82893643us : Unknown type 4
[   82.895853]   <idle>-0       0d... 82895118us : Unknown type 4
[   82.895859]   <idle>-0       0dN.. 82895147us : Unknown type 4
[   82.895864]   <idle>-0       0d... 82895177us : Unknown type 4
[   82.895865] ---------------------------------

but if compile from fedora 14 gcc, will still have some delay.

[   33.464561] cpu_dev_init done
[   51.953005] memory_dev_init done

and it also have that warning...

Thanks

Yinghai

Doh, ftrace couldn't recognize that trace is of stacktrace type. We need to initialize the events output earlier.

Sorry, can you retry after applying the following patch?

index cf535cc..ad92d9c 100644
@@ -1278,4 +1278,4 @@ __init static int init_events(void)
 
 	return 0;
 }
-device_initcall(init_events);
+early_initcall(init_events);

...

[   89.913205] ------------[ cut here ]------------
[   89.913216] WARNING: at kernel/rcutree.c:352 rcu_enter_nohz+0x49/0x8b()
[   89.913220] Hardware name: Sun Fire X4800 M2 
[   89.913224] Modules linked in:
[   89.913230] Switched to NOHz mode on CPU #34
[   89.913237] Pid: 0, comm: swapper Tainted: G        W   2.6.39-rc7-tip-yh-05281-g8e9254b-dirty #1019
[   89.913242] Call Trace:
[   89.913269]  [<ffffffff81080144>] warn_slowpath_common+0x85/0x9d
[   89.913280]  [<ffffffff81080176>] warn_slowpath_null+0x1a/0x1c
[   89.913290]  [<ffffffff810d32cc>] rcu_enter_nohz+0x49/0x8b
[   89.913305]  [<ffffffff810ab121>] tick_nohz_stop_sched_tick+0x27d/0x366
[   89.913317]  [<ffffffff810391bc>] cpu_idle+0x7a/0xcc
[   89.913329]  [<ffffffff81bda6e3>] rest_init+0xb7/0xbe
[   89.913340]  [<ffffffff81bda62c>] ? csum_partial_copy_generic+0x16c/0x16c
[   89.913352]  [<ffffffff82742e39>] start_kernel+0x3b2/0x3bd
[   89.913363]  [<ffffffff827422cc>] x86_64_start_reservations+0x9c/0xa0
[   89.913374]  [<ffffffff827424a8>] x86_64_start_kernel+0x1d8/0x1e3
[   89.913379] ---[ end trace a7919e7f17c0a726 ]---
[   89.913401] Dumping ftrace buffer:
[   89.913417] Switched to NOHz mode on CPU #4
[   89.913428] ---------------------------------
[   89.913444] Switched to NOHz mode on CPU #54
[   89.913467] CPU:0 [LOST 39120 EVENTS]
[   89.913469]   <idle>-0       0d... 89769327us : <stack trace>
[   89.913472]  => rcu_irq_enter
[   89.913474]  => irq_enter
[   89.913475]  => smp_apic_timer_interrupt
[   89.913478]  => apic_timer_interrupt
[   89.913479]  => cpu_idle
[   89.913481]  => rest_init
[   89.913482]  => start_kernel
[   89.913484]  => x86_64_start_reservations
[   89.913490] Switched to NOHz mode on CPU #48
[   89.913496] Switched to NOHz mode on CPU #42
[   89.913509]   <idle>-0       0dN.. 89769365us : <stack trace>
[   89.913512]  => rcu_irq_exit
[   89.913513]  => irq_exit
[   89.913515]  => smp_apic_timer_interrupt
[   89.913517]  => apic_timer_interrupt
[   89.913518]  => cpu_idle
[   89.913520]  => rest_init
[   89.913521]  => start_kernel
[   89.913523]  => x86_64_start_reservations
[   89.913546]   <idle>-0       0d... 89773320us : <stack trace>
[   89.913549]  => rcu_irq_enter
[   89.913550]  => irq_enter
[   89.913552]  => smp_apic_timer_interrupt
[   89.913554]  => apic_timer_interrupt
[   89.913556]  => cpu_idle
[   89.913557]  => rest_init
[   89.913558]  => start_kernel
[   89.913560]  => x86_64_start_reservations
[   89.913583]   <idle>-0       0dN.. 89773360us : <stack trace>
[   89.913588]  => rcu_irq_exit
[   89.913589]  => irq_exit
[   89.913592]  => smp_apic_timer_interrupt
[   89.913594]  => apic_timer_interrupt
[   89.913595]  => cpu_idle
[   89.913597]  => rest_init
[   89.913598]  => start_kernel
[   89.913600]  => x86_64_start_reservations
[   89.913606] Switched to NOHz mode on CPU #33
[   89.913613] Switched to NOHz mode on CPU #61
[   89.913623] Switched to NOHz mode on CPU #102
[   89.913629] Switched to NOHz mode on CPU #50
[   89.913634]   <idle>-0       0d... 89777313us : <stack trace>
[   89.913637]  => rcu_irq_enter
[   89.913638]  => irq_enter
[   89.913640]  => smp_apic_timer_interrupt
[   89.913641]  => apic_timer_interrupt
[   89.913643]  => cpu_idle
[   89.913645]  => rest_init
[   89.913646]  => start_kernel
[   89.913648]  => x86_64_start_reservations
[   89.913662] Switched to NOHz mode on CPU #41
[   89.913668] Switched to NOHz mode on CPU #45
[   89.913674]   <idle>-0       0dN.. 89777352us : <stack trace>
[   89.913677]  => rcu_irq_exit
[   89.913678]  => irq_exit
[   89.913680]  => smp_apic_timer_interrupt
[   89.913682]  => apic_timer_interrupt
[   89.913683]  => cpu_idle
[   89.913685]  => rest_init
[   89.913686]  => start_kernel
[   89.913688]  => x86_64_start_reservations
[   89.913711]   <idle>-0       0d... 89781306us : <stack trace>
[   89.913713]  => rcu_irq_enter
[   89.913715]  => irq_enter
[   89.913717]  => smp_apic_timer_interrupt
[   89.913719]  => apic_timer_interrupt
[   89.913720]  => cpu_idle
[   89.913722]  => rest_init
[   89.913723]  => start_kernel
[   89.913725]  => x86_64_start_reservations
[   89.913747]   <idle>-0       0dN.. 89781340us : <stack trace>
[   89.913751]  => rcu_irq_exit
[   89.913753]  => irq_exit
[   89.913754]  => smp_apic_timer_interrupt
[   89.913756]  => apic_timer_interrupt
[   89.913758]  => cpu_idle
[   89.913759]  => rest_init
[   89.913761]  => start_kernel
[   89.913762]  => x86_64_start_reservations
[   89.913768] Switched to NOHz mode on CPU #35
[   89.913786]   <idle>-0       0d... 89785299us : <stack trace>
[   89.913788]  => rcu_irq_enter
[   89.913790]  => irq_enter
[   89.913791]  => smp_apic_timer_interrupt
[   89.913793]  => apic_timer_interrupt
[   89.913795]  => cpu_idle
[   89.913796]  => rest_init
[   89.913798]  => start_kernel
[   89.913799]  => x86_64_start_reservations
[   89.913822]   <idle>-0       0dN.. 89785334us : <stack trace>
[   89.913825]  => rcu_irq_exit
[   89.913826]  => irq_exit
[   89.913828]  => smp_apic_timer_interrupt
[   89.913830]  => apic_timer_interrupt
[   89.913831]  => cpu_idle
[   89.913833]  => rest_init
[   89.913834]  => start_kernel
[   89.913836]  => x86_64_start_reservations
[   89.913859]   <idle>-0       0d... 89789292us : <stack trace>
[   89.913861]  => rcu_irq_enter
[   89.913863]  => irq_enter
[   89.913865]  => smp_apic_timer_interrupt
[   89.913866]  => apic_timer_interrupt
[   89.913868]  => cpu_idle
[   89.913870]  => rest_init
[   89.913871]  => start_kernel
[   89.913873]  => x86_64_start_reservations
[   89.913895]   <idle>-0       0dN.. 89789326us : <stack trace>
[   89.913898]  => rcu_irq_exit
[   89.913900]  => irq_exit
[   89.913901]  => smp_apic_timer_interrupt
[   89.913903]  => apic_timer_interrupt
[   89.913905]  => cpu_idle
[   89.913906]  => rest_init
[   89.913908]  => start_kernel
[   89.913909]  => x86_64_start_reservations
[   89.913932]   <idle>-0       0d... 89793285us : <stack trace>
[   89.913935]  => rcu_irq_enter
[   89.913936]  => irq_enter
[   89.913938]  => smp_apic_timer_interrupt
[   89.913939]  => apic_timer_interrupt
[   89.913941]  => cpu_idle
[   89.913943]  => rest_init
[   89.913944]  => start_kernel
[   89.913946]  => x86_64_start_reservations
[   89.913968]   <idle>-0       0dN.. 89793320us : <stack trace>
[   89.913971]  => rcu_irq_exit
[   89.913973]  => irq_exit
[   89.913974]  => smp_apic_timer_interrupt
[   89.913976]  => apic_timer_interrupt
[   89.913978]  => cpu_idle
[   89.913979]  => rest_init
[   89.913981]  => start_kernel
[   89.913982]  => x86_64_start_reservations
[   89.914005]   <idle>-0       0d... 89797278us : <stack trace>
[   89.914008]  => rcu_irq_enter
[   89.914009]  => irq_enter
[   89.914011]  => smp_apic_timer_interrupt
[   89.914013]  => apic_timer_interrupt
[   89.914014]  => cpu_idle
[   89.914016]  => rest_init
[   89.914017]  => start_kernel
[   89.914019]  => x86_64_start_reservations
[   89.914042]   <idle>-0       0dN.. 89797319us : <stack trace>
[   89.914044]  => rcu_irq_exit
[   89.914046]  => irq_exit
[   89.914047]  => smp_apic_timer_interrupt
[   89.914049]  => apic_timer_interrupt
[   89.914051]  => cpu_idle
[   89.914052]  => rest_init
[   89.914054]  => start_kernel
[   89.914055]  => x86_64_start_reservations
[   89.914078]   <idle>-0       0d... 89801271us : <stack trace>
[   89.914081]  => rcu_irq_enter
[   89.914082]  => irq_enter
[   89.914084]  => smp_apic_timer_interrupt
[   89.914086]  => apic_timer_interrupt
[   89.914088]  => cpu_idle
[   89.914089]  => rest_init
[   89.914090]  => start_kernel
[   89.914092]  => x86_64_start_reservations
[   89.914115]   <idle>-0       0dN.. 89801311us : <stack trace>
[   89.914118]  => rcu_irq_exit
[   89.914119]  => irq_exit
[   89.914121]  => smp_apic_timer_interrupt
[   89.914123]  => apic_timer_interrupt
[   89.914124]  => cpu_idle
[   89.914126]  => rest_init
[   89.914127]  => start_kernel
[   89.914129]  => x86_64_start_reservations
[   89.914152]   <idle>-0       0d... 89805264us : <stack trace>
[   89.914154]  => rcu_irq_enter
[   89.914156]  => irq_enter
[   89.914158]  => smp_apic_timer_interrupt
[   89.914159]  => apic_timer_interrupt
[   89.914161]  => cpu_idle
[   89.914163]  => rest_init
[   89.914164]  => start_kernel
[   89.914166]  => x86_64_start_reservations
[   89.914188]   <idle>-0       0dN.. 89805297us : <stack trace>
[   89.914191]  => rcu_irq_exit
[   89.914193]  => irq_exit
[   89.914194]  => smp_apic_timer_interrupt
[   89.914196]  => apic_timer_interrupt
[   89.914198]  => cpu_idle
[   89.914199]  => rest_init
[   89.914200]  => start_kernel
[   89.914202]  => x86_64_start_reservations
[   89.914225]   <idle>-0       0d... 89809257us : <stack trace>
[   89.914227]  => rcu_irq_enter
[   89.914229]  => irq_enter
[   89.914231]  => smp_apic_timer_interrupt
[   89.914232]  => apic_timer_interrupt
[   89.914234]  => cpu_idle
[   89.914236]  => rest_init
[   89.914237]  => start_kernel
[   89.914239]  => x86_64_start_reservations
[   89.914261]   <idle>-0       0dN.. 89809292us : <stack trace>
[   89.914264]  => rcu_irq_exit
[   89.914266]  => irq_exit
[   89.914267]  => smp_apic_timer_interrupt
[   89.914269]  => apic_timer_interrupt
[   89.914271]  => cpu_idle
[   89.914272]  => rest_init
[   89.914274]  => start_kernel
[   89.914275]  => x86_64_start_reservations
[   89.914298]   <idle>-0       0d... 89813250us : <stack trace>
[   89.914301]  => rcu_irq_enter
[   89.914302]  => irq_enter
[   89.914304]  => smp_apic_timer_interrupt
[   89.914306]  => apic_timer_interrupt
[   89.914307]  => cpu_idle
[   89.914309]  => rest_init
[   89.914310]  => start_kernel
[   89.914312]  => x86_64_start_reservations
[   89.914329] Switched to NOHz mode on CPU #38
[   89.914335]   <idle>-0       0dN.. 89813283us : <stack trace>
[   89.914338]  => rcu_irq_exit
[   89.914339]  => irq_exit
[   89.914341]  => smp_apic_timer_interrupt
[   89.914343]  => apic_timer_interrupt
[   89.914344]  => cpu_idle
[   89.914346]  => rest_init
[   89.914347]  => start_kernel
[   89.914349]  => x86_64_start_reservations
[   89.914359] Switched to NOHz mode on CPU #154
[   89.914365] Switched to NOHz mode on CPU #159
[   89.914373]   <idle>-0       0d... 89817243us : <stack trace>
[   89.914376]  => rcu_irq_enter
[   89.914378]  => irq_enter
[   89.914381]  => smp_apic_timer_interrupt
[   89.914384]  => apic_timer_interrupt
[   89.914385]  => cpu_idle
[   89.914387]  => rest_init
[   89.914388]  => start_kernel
[   89.914390]  => x86_64_start_reservations
[   89.914400] Switched to NOHz mode on CPU #142
[   89.914407] Switched to NOHz mode on CPU #148
[   89.914415] Switched to NOHz mode on CPU #147
[   89.914423] Switched to NOHz mode on CPU #153
[   89.914430] Switched to NOHz mode on CPU #157
[   89.914438]   <idle>-0       0dN.. 89817279us : <stack trace>
[   89.914441]  => rcu_irq_exit
[   89.914443]  => irq_exit
[   89.914444]  => smp_apic_timer_interrupt
[   89.914446]  => apic_timer_interrupt
[   89.914448]  => cpu_idle
[   89.914449]  => rest_init
[   89.914451]  => start_kernel
[   89.914452]  => x86_64_start_reservations
[   89.914458] Switched to NOHz mode on CPU #146
[   89.914462] Switched to NOHz mode on CPU #144
[   89.914467] Switched to NOHz mode on CPU #136
[   89.914472] Switched to NOHz mode on CPU #133
[   89.914479]   <idle>-0       0d... 89821236us : <stack trace>
[   89.914482]  => rcu_irq_enter
[   89.914484]  => irq_enter
[   89.914485]  => smp_apic_timer_interrupt
[   89.914487]  => apic_timer_interrupt
[   89.914489]  => cpu_idle
[   89.914490]  => rest_init
[   89.914492]  => start_kernel
[   89.914494]  => x86_64_start_reservations
[   89.914500] Switched to NOHz mode on CPU #123
[   89.914505] Switched to NOHz mode on CPU #128
[   89.914510] Switched to NOHz mode on CPU #119
[   89.914515] Switched to NOHz mode on CPU #117
[   89.914524] Switched to NOHz mode on CPU #116
[   89.914533] Switched to NOHz mode on CPU #115
[   89.914541] Switched to NOHz mode on CPU #131
[   89.914547] Switched to NOHz mode on CPU #150
[   89.914554]   <idle>-0       0dN.. 89821271us : <stack trace>
[   89.914557]  => rcu_irq_exit
[   89.914559]  => irq_exit
[   89.914560]  => smp_apic_timer_interrupt
[   89.914562]  => apic_timer_interrupt
[   89.914564]  => cpu_idle
[   89.914566]  => rest_init
[   89.914567]  => start_kernel
[   89.914569]  => x86_64_start_reservations
[   89.914576] Switched to NOHz mode on CPU #109
[   89.914585] Switched to NOHz mode on CPU #106
[   89.914593] Switched to NOHz mode on CPU #100
[   89.914601] Switched to NOHz mode on CPU #101
[   89.914611] Switched to NOHz mode on CPU #111
[   89.914619] Switched to NOHz mode on CPU #124
[   89.914628] Switched to NOHz mode on CPU #83
[   89.914636]   <idle>-0       0d... 89825229us : <stack trace>
[   89.914642]  => rcu_irq_enter
[   89.914646]  => irq_enter
[   89.914648]  => smp_apic_timer_interrupt
[   89.914651]  => apic_timer_interrupt
[   89.914653]  => cpu_idle
[   89.914655]  => rest_init
[   89.914659]  => start_kernel
[   89.914660]  => x86_64_start_reservations
[   89.914673] Switched to NOHz mode on CPU #7
[   89.914682] Switched to NOHz mode on CPU #87
[   89.914697] Switched to NOHz mode on CPU #9
[   89.914711] Switched to NOHz mode on CPU #6
[   89.914736]   <idle>-0       0dN.. 89825262us : <stack trace>
[   89.914740]  => rcu_irq_exit
[   89.914743]  => irq_exit
[   89.914745]  => smp_apic_timer_interrupt
[   89.914748]  => apic_timer_interrupt
[   89.914759]  => cpu_idle
[   89.914761]  => rest_init
[   89.914763]  => start_kernel
[   89.914766]  => x86_64_start_reservations
[   89.914773] Switched to NOHz mode on CPU #80
[   89.914794] Switched to NOHz mode on CPU #2
[   89.914804] Switched to NOHz mode on CPU #82
[   89.914824] Switched to NOHz mode on CPU #85
[   89.914847] Switched to NOHz mode on CPU #88
[   89.914881]   <idle>-0       0d... 89829222us : <stack trace>
[   89.914891]  => rcu_irq_enter
[   89.914893]  => irq_enter
[   89.914894]  => smp_apic_timer_interrupt
[   89.914896]  => apic_timer_interrupt
[   89.914898]  => cpu_idle
[   89.914899]  => rest_init
[   89.914901]  => start_kernel
[   89.914902]  => x86_64_start_reservations
[   89.914926] Switched to NOHz mode on CPU #97
[   89.914954] Switched to NOHz mode on CPU #95
[   89.915011] Switched to NOHz mode on CPU #99
[   89.915049] Switched to NOHz mode on CPU #10
[   89.915080] Switched to NOHz mode on CPU #90
[   89.915142] Switched to NOHz mode on CPU #13
[   89.915166] Switched to NOHz mode on CPU #93
[   89.915209] Switched to NOHz mode on CPU #15
[   89.915274] Switched to NOHz mode on CPU #98
[   89.915294] Switched to NOHz mode on CPU #18
[   89.915333] Switched to NOHz mode on CPU #92
[   89.915381] Switched to NOHz mode on CPU #12
[   89.915450] Switched to NOHz mode on CPU #14
[   89.915512] Switched to NOHz mode on CPU #94
[   89.915551] Switched to NOHz mode on CPU #91
[   89.915600] Switched to NOHz mode on CPU #96
[   89.915639] Switched to NOHz mode on CPU #21
[   89.915677] Switched to NOHz mode on CPU #22
[   89.915722] Switched to NOHz mode on CPU #29
[   89.915761] Switched to NOHz mode on CPU #107
[   89.915789] Switched to NOHz mode on CPU #26
[   89.915857] Switched to NOHz mode on CPU #105
[   89.915876] Switched to NOHz mode on CPU #25
[   89.915902] Switched to NOHz mode on CPU #108
[   89.915911] Switched to NOHz mode on CPU #28
[   89.915942] Switched to NOHz mode on CPU #23
[   89.915964] Switched to NOHz mode on CPU #103
[   89.915994] Switched to NOHz mode on CPU #20
[   89.916024] Switched to NOHz mode on CPU #27
[   89.916043] Switched to NOHz mode on CPU #24
[   89.916059] Switched to NOHz mode on CPU #104
[   89.916104] Switched to NOHz mode on CPU #31
[   89.916140] Switched to NOHz mode on CPU #32
[   89.916153] Switched to NOHz mode on CPU #112
[   89.916179] Switched to NOHz mode on CPU #114
[   89.916216] Switched to NOHz mode on CPU #30
[   89.916233] Switched to NOHz mode on CPU #110
[   89.916253] Switched to NOHz mode on CPU #113
[   89.916276] Switched to NOHz mode on CPU #118
[   89.916305] Switched to NOHz mode on CPU #129
[   89.916323] Switched to NOHz mode on CPU #121
[   89.916340] Switched to NOHz mode on CPU #125
[   89.916367] Switched to NOHz mode on CPU #122
[   89.916387] Switched to NOHz mode on CPU #127
[   89.916415] Switched to NOHz mode on CPU #120
[   89.916437] Switched to NOHz mode on CPU #126
[   89.916454] Switched to NOHz mode on CPU #139
[   89.916479] Switched to NOHz mode on CPU #135
[   89.916492] Switched to NOHz mode on CPU #137
[   89.916513] Switched to NOHz mode on CPU #134
[   89.916530] Switched to NOHz mode on CPU #138
[   89.916539] Switched to NOHz mode on CPU #132
[   89.916560] Switched to NOHz mode on CPU #130
[   89.916575] Switched to NOHz mode on CPU #68
[   89.916581] Switched to NOHz mode on CPU #64
[   89.916597] Switched to NOHz mode on CPU #65
[   89.916608] Switched to NOHz mode on CPU #145
[   89.916620] Switched to NOHz mode on CPU #141
[   89.916633] Switched to NOHz mode on CPU #63
[   89.916642] Switched to NOHz mode on CPU #67
[   89.916650] Switched to NOHz mode on CPU #152
[   89.916659] Switched to NOHz mode on CPU #72
[   89.916673] Switched to NOHz mode on CPU #77
[   89.916688] Switched to NOHz mode on CPU #158
[   89.916699] Switched to NOHz mode on CPU #78
[   89.916713] Switched to NOHz mode on CPU #70
[   89.916725] Switched to NOHz mode on CPU #76
[   89.916736] Switched to NOHz mode on CPU #156
[   89.916748] Switched to NOHz mode on CPU #151
[   89.916756] Switched to NOHz mode on CPU #71
[   89.916768] Switched to NOHz mode on CPU #75
[   89.916775] Switched to NOHz mode on CPU #155
[   89.916786] Switched to NOHz mode on CPU #73
[   89.916795] Switched to NOHz mode on CPU #74
[   89.916806]   <idle>-0       0dN.. 89829255us : <stack trace>
[   89.916812]  => rcu_irq_exit
[   89.916814]  => irq_exit
[   89.916816]  => smp_apic_timer_interrupt
[   89.916818]  => apic_timer_interrupt
[   89.916819]  => cpu_idle
[   89.916821]  => rest_init
[   89.916823]  => start_kernel
[   89.916824]  => x86_64_start_reservations
[   89.916832] Switched to NOHz mode on CPU #89
[   89.916841] Switched to NOHz mode on CPU #84
[   89.916853] Switched to NOHz mode on CPU #81
[   89.916863] Switched to NOHz mode on CPU #1
[   89.916872] Switched to NOHz mode on CPU #5
[   89.916882] Switched to NOHz mode on CPU #8
[   89.916889] Switched to NOHz mode on CPU #3
[   89.916898] Switched to NOHz mode on CPU #86
[   89.916904]   <idle>-0       0d... 89833215us : <stack trace>
[   89.916907]  => rcu_irq_enter
[   89.916909]  => irq_enter
[   89.916911]  => smp_apic_timer_interrupt
[   89.916913]  => apic_timer_interrupt
[   89.916915]  => cpu_idle
[   89.916916]  => rest_init
[   89.916918]  => start_kernel
[   89.916919]  => x86_64_start_reservations
[   89.916926] Switched to NOHz mode on CPU #16
[   89.916932] Switched to NOHz mode on CPU #17
[   89.916939] Switched to NOHz mode on CPU #11
[   89.916946] Switched to NOHz mode on CPU #19
[   89.916952] Switched to NOHz mode on CPU #66
[   89.916956] Switched to NOHz mode on CPU #69
[   89.916960] Switched to NOHz mode on CPU #149
[   89.916964] Switched to NOHz mode on CPU #140
[   89.916969]   <idle>-0       0dN.. 89833252us : <stack trace>
[   89.916971]  => rcu_irq_exit
[   89.916973]  => irq_exit
[   89.916974]  => smp_apic_timer_interrupt
[   89.916976]  => apic_timer_interrupt
[   89.916978]  => cpu_idle
[   89.916980]  => rest_init
[   89.916981]  => start_kernel
[   89.916983]  => x86_64_start_reservations
[   89.917006]   <idle>-0       0d... 89837208us : <stack trace>
[   89.917009]  => rcu_irq_enter
[   89.917010]  => irq_enter
[   89.917012]  => smp_apic_timer_interrupt
[   89.917014]  => apic_timer_interrupt
[   89.917015]  => cpu_idle
[   89.917017]  => rest_init
[   89.917018]  => start_kernel
[   89.917020]  => x86_64_start_reservations
[   89.917043]   <idle>-0       0dN.. 89837248us : <stack trace>
[   89.917046]  => rcu_irq_exit
[   89.917047]  => irq_exit
[   89.917049]  => smp_apic_timer_interrupt
[   89.917051]  => apic_timer_interrupt
[   89.917053]  => cpu_idle
[   89.917054]  => rest_init
[   89.917055]  => start_kernel
[   89.917057]  => x86_64_start_reservations
[   89.917080]   <idle>-0       0d... 89841201us : <stack trace>
[   89.917083]  => rcu_irq_enter
[   89.917084]  => irq_enter
[   89.917086]  => smp_apic_timer_interrupt
[   89.917088]  => apic_timer_interrupt
[   89.917089]  => cpu_idle
[   89.917091]  => rest_init
[   89.917092]  => start_kernel
[   89.917094]  => x86_64_start_reservations
[   89.917117]   <idle>-0       0dN.. 89841242us : <stack trace>
[   89.917119]  => rcu_irq_exit
[   89.917121]  => irq_exit
[   89.917123]  => smp_apic_timer_interrupt
[   89.917125]  => apic_timer_interrupt
[   89.917126]  => cpu_idle
[   89.917128]  => rest_init
[   89.917129]  => start_kernel
[   89.917131]  => x86_64_start_reservations
[   89.917154]   <idle>-0       0d... 89845194us : <stack trace>
[   89.917156]  => rcu_irq_enter
[   89.917158]  => irq_enter
[   89.917160]  => smp_apic_timer_interrupt
[   89.917161]  => apic_timer_interrupt
[   89.917163]  => cpu_idle
[   89.917165]  => rest_init
[   89.917166]  => start_kernel
[   89.917168]  => x86_64_start_reservations
[   89.917190]   <idle>-0       0dN.. 89845234us : <stack trace>
[   89.917193]  => rcu_irq_exit
[   89.917195]  => irq_exit
[   89.917196]  => smp_apic_timer_interrupt
[   89.917198]  => apic_timer_interrupt
[   89.917200]  => cpu_idle
[   89.917201]  => rest_init
[   89.917203]  => start_kernel
[   89.917204]  => x86_64_start_reservations
[   89.917227]   <idle>-0       0d... 89849187us : <stack trace>
[   89.917230]  => rcu_irq_enter
[   89.917231]  => irq_enter
[   89.917233]  => smp_apic_timer_interrupt
[   89.917235]  => apic_timer_interrupt
[   89.917237]  => cpu_idle
[   89.917238]  => rest_init
[   89.917240]  => start_kernel
[   89.917241]  => x86_64_start_reservations
[   89.917264]   <idle>-0       0dN.. 89849228us : <stack trace>
[   89.917267]  => rcu_irq_exit
[   89.917269]  => irq_exit
[   89.917270]  => smp_apic_timer_interrupt
[   89.917272]  => apic_timer_interrupt
[   89.917274]  => cpu_idle
[   89.917275]  => rest_init
[   89.917276]  => start_kernel
[   89.917278]  => x86_64_start_reservations
[   89.917301]   <idle>-0       0d... 89853180us : <stack trace>
[   89.917304]  => rcu_irq_enter
[   89.917305]  => irq_enter
[   89.917307]  => smp_apic_timer_interrupt
[   89.917309]  => apic_timer_interrupt
[   89.917310]  => cpu_idle
[   89.917312]  => rest_init
[   89.917313]  => start_kernel
[   89.917315]  => x86_64_start_reservations
[   89.917338]   <idle>-0       0dN.. 89853222us : <stack trace>
[   89.917340]  => rcu_irq_exit
[   89.917342]  => irq_exit
[   89.917343]  => smp_apic_timer_interrupt
[   89.917345]  => apic_timer_interrupt
[   89.917347]  => cpu_idle
[   89.917349]  => rest_init
[   89.917350]  => start_kernel
[   89.917352]  => x86_64_start_reservations
[   89.917375]   <idle>-0       0d... 89857173us : <stack trace>
[   89.917378]  => rcu_irq_enter
[   89.917379]  => irq_enter
[   89.917381]  => smp_apic_timer_interrupt
[   89.917383]  => apic_timer_interrupt
[   89.917384]  => cpu_idle
[   89.917386]  => rest_init
[   89.917387]  => start_kernel
[   89.917389]  => x86_64_start_reservations
[   89.917412]   <idle>-0       0dN.. 89857211us : <stack trace>
[   89.917414]  => rcu_irq_exit
[   89.917416]  => irq_exit
[   89.917418]  => smp_apic_timer_interrupt
[   89.917419]  => apic_timer_interrupt
[   89.917421]  => cpu_idle
[   89.917423]  => rest_init
[   89.917424]  => start_kernel
[   89.917426]  => x86_64_start_reservations
[   89.917449]   <idle>-0       0d... 89861166us : <stack trace>
[   89.917451]  => rcu_irq_enter
[   89.917453]  => irq_enter
[   89.917454]  => smp_apic_timer_interrupt
[   89.917456]  => apic_timer_interrupt
[   89.917458]  => cpu_idle
[   89.917459]  => rest_init
[   89.917461]  => start_kernel
[   89.917462]  => x86_64_start_reservations
[   89.917485]   <idle>-0       0dN.. 89861199us : <stack trace>
[   89.917488]  => rcu_irq_exit
[   89.917490]  => irq_exit
[   89.917491]  => smp_apic_timer_interrupt
[   89.917493]  => apic_timer_interrupt
[   89.917495]  => cpu_idle
[   89.917496]  => rest_init
[   89.917498]  => start_kernel
[   89.917499]  => x86_64_start_reservations
[   89.917524]   <idle>-0       0d... 89865159us : <stack trace>
[   89.917526]  => rcu_irq_enter
[   89.917528]  => irq_enter
[   89.917530]  => smp_apic_timer_interrupt
[   89.917531]  => apic_timer_interrupt
[   89.917533]  => cpu_idle
[   89.917535]  => rest_init
[   89.917536]  => start_kernel
[   89.917538]  => x86_64_start_reservations
[   89.917560]   <idle>-0       0dN.. 89865193us : <stack trace>
[   89.917563]  => rcu_irq_exit
[   89.917565]  => irq_exit
[   89.917566]  => smp_apic_timer_interrupt
[   89.917568]  => apic_timer_interrupt
[   89.917570]  => cpu_idle
[   89.917571]  => rest_init
[   89.917573]  => start_kernel
[   89.917574]  => x86_64_start_reservations
[   89.917597]   <idle>-0       0d... 89869152us : <stack trace>
[   89.917600]  => rcu_irq_enter
[   89.917602]  => irq_enter
[   89.917603]  => smp_apic_timer_interrupt
[   89.917605]  => apic_timer_interrupt
[   89.917607]  => cpu_idle
[   89.917608]  => rest_init
[   89.917610]  => start_kernel
[   89.917611]  => x86_64_start_reservations
[   89.917634]   <idle>-0       0dN.. 89869185us : <stack trace>
[   89.917636]  => rcu_irq_exit
[   89.917638]  => irq_exit
[   89.917640]  => smp_apic_timer_interrupt
[   89.917641]  => apic_timer_interrupt
[   89.917643]  => cpu_idle
[   89.917645]  => rest_init
[   89.917646]  => start_kernel
[   89.917648]  => x86_64_start_reservations
[   89.917671]   <idle>-0       0d... 89873145us : <stack trace>
[   89.917673]  => rcu_irq_enter
[   89.917675]  => irq_enter
[   89.917677]  => smp_apic_timer_interrupt
[   89.917678]  => apic_timer_interrupt
[   89.917680]  => cpu_idle
[   89.917682]  => rest_init
[   89.917683]  => start_kernel
[   89.917685]  => x86_64_start_reservations
[   89.917708]   <idle>-0       0dN.. 89873178us : <stack trace>
[   89.917710]  => rcu_irq_exit
[   89.917712]  => irq_exit
[   89.917713]  => smp_apic_timer_interrupt
[   89.917715]  => apic_timer_interrupt
[   89.917717]  => cpu_idle
[   89.917718]  => rest_init
[   89.917720]  => start_kernel
[   89.917721]  => x86_64_start_reservations
[   89.917744]   <idle>-0       0d... 89877138us : <stack trace>
[   89.917747]  => rcu_irq_enter
[   89.917749]  => irq_enter
[   89.917750]  => smp_apic_timer_interrupt
[   89.917752]  => apic_timer_interrupt
[   89.917754]  => cpu_idle
[   89.917755]  => rest_init
[   89.917757]  => start_kernel
[   89.917758]  => x86_64_start_reservations
[   89.917781]   <idle>-0       0dN.. 89877174us : <stack trace>
[   89.917784]  => rcu_irq_exit
[   89.917786]  => irq_exit
[   89.917787]  => smp_apic_timer_interrupt
[   89.917789]  => apic_timer_interrupt
[   89.917791]  => cpu_idle
[   89.917792]  => rest_init
[   89.917794]  => start_kernel
[   89.917795]  => x86_64_start_reservations
[   89.917818]   <idle>-0       0d... 89881131us : <stack trace>
[   89.917821]  => rcu_irq_enter
[   89.917823]  => irq_enter
[   89.917824]  => smp_apic_timer_interrupt
[   89.917826]  => apic_timer_interrupt
[   89.917828]  => cpu_idle
[   89.917829]  => rest_init
[   89.917831]  => start_kernel
[   89.917832]  => x86_64_start_reservations
[   89.917855]   <idle>-0       0dN.. 89881165us : <stack trace>
[   89.917858]  => rcu_irq_exit
[   89.917859]  => irq_exit
[   89.917861]  => smp_apic_timer_interrupt
[   89.917863]  => apic_timer_interrupt
[   89.917865]  => cpu_idle
[   89.917866]  => rest_init
[   89.917867]  => start_kernel
[   89.917869]  => x86_64_start_reservations
[   89.917892]   <idle>-0       0d... 89885124us : <stack trace>
[   89.917894]  => rcu_irq_enter
[   89.917896]  => irq_enter
[   89.917898]  => smp_apic_timer_interrupt
[   89.917899]  => apic_timer_interrupt
[   89.917901]  => cpu_idle
[   89.917903]  => rest_init
[   89.917904]  => start_kernel
[   89.917906]  => x86_64_start_reservations
[   89.917929]   <idle>-0       0dN.. 89885161us : <stack trace>
[   89.917931]  => rcu_irq_exit
[   89.917933]  => irq_exit
[   89.917934]  => smp_apic_timer_interrupt
[   89.917936]  => apic_timer_interrupt
[   89.917938]  => cpu_idle
[   89.917940]  => rest_init
[   89.917941]  => start_kernel
[   89.917943]  => x86_64_start_reservations
[   89.917965]   <idle>-0       0d... 89889117us : <stack trace>
[   89.917968]  => rcu_irq_enter
[   89.917970]  => irq_enter
[   89.917971]  => smp_apic_timer_interrupt
[   89.917973]  => apic_timer_interrupt
[   89.917975]  => cpu_idle
[   89.917976]  => rest_init
[   89.917978]  => start_kernel
[   89.917979]  => x86_64_start_reservations
[   89.918002]   <idle>-0       0dN.. 89889150us : <stack trace>
[   89.918005]  => rcu_irq_exit
[   89.918006]  => irq_exit
[   89.918008]  => smp_apic_timer_interrupt
[   89.918010]  => apic_timer_interrupt
[   89.918011]  => cpu_idle
[   89.918013]  => rest_init
[   89.918014]  => start_kernel
[   89.918016]  => x86_64_start_reservations
[   89.918039]   <idle>-0       0d... 89893110us : <stack trace>
[   89.918041]  => rcu_irq_enter
[   89.918043]  => irq_enter
[   89.918045]  => smp_apic_timer_interrupt
[   89.918046]  => apic_timer_interrupt
[   89.918048]  => cpu_idle
[   89.918050]  => rest_init
[   89.918051]  => start_kernel
[   89.918053]  => x86_64_start_reservations
[   89.918075]   <idle>-0       0dN.. 89893147us : <stack trace>
[   89.918078]  => rcu_irq_exit
[   89.918080]  => irq_exit
[   89.918081]  => smp_apic_timer_interrupt
[   89.918083]  => apic_timer_interrupt
[   89.918085]  => cpu_idle
[   89.918086]  => rest_init
[   89.918088]  => start_kernel
[   89.918089]  => x86_64_start_reservations
[   89.918112]   <idle>-0       0d... 89897103us : <stack trace>
[   89.918115]  => rcu_irq_enter
[   89.918116]  => irq_enter
[   89.918118]  => smp_apic_timer_interrupt
[   89.918120]  => apic_timer_interrupt
[   89.918121]  => cpu_idle
[   89.918123]  => rest_init
[   89.918124]  => start_kernel
[   89.918126]  => x86_64_start_reservations
[   89.918149]   <idle>-0       0dN.. 89897136us : <stack trace>
[   89.918151]  => rcu_irq_exit
[   89.918153]  => irq_exit
[   89.918155]  => smp_apic_timer_interrupt
[   89.918157]  => apic_timer_interrupt
[   89.918158]  => cpu_idle
[   89.918160]  => rest_init
[   89.918161]  => start_kernel
[   89.918163]  => x86_64_start_reservations
[   89.918186]   <idle>-0       0d... 89901096us : <stack trace>
[   89.918188]  => rcu_irq_enter
[   89.918190]  => irq_enter
[   89.918192]  => smp_apic_timer_interrupt
[   89.918193]  => apic_timer_interrupt
[   89.918195]  => cpu_idle
[   89.918197]  => rest_init
[   89.918198]  => start_kernel
[   89.918200]  => x86_64_start_reservations
[   89.918223]   <idle>-0       0dN.. 89901133us : <stack trace>
[   89.918225]  => rcu_irq_exit
[   89.918227]  => irq_exit
[   89.918228]  => smp_apic_timer_interrupt
[   89.918230]  => apic_timer_interrupt
[   89.918232]  => cpu_idle
[   89.918234]  => rest_init
[   89.918235]  => start_kernel
[   89.918237]  => x86_64_start_reservations
[   89.918260]   <idle>-0       0d... 89905089us : <stack trace>
[   89.918262]  => rcu_irq_enter
[   89.918264]  => irq_enter
[   89.918265]  => smp_apic_timer_interrupt
[   89.918267]  => apic_timer_interrupt
[   89.918269]  => cpu_idle
[   89.918270]  => rest_init
[   89.918272]  => start_kernel
[   89.918273]  => x86_64_start_reservations
[   89.918296]   <idle>-0       0dN.. 89905128us : <stack trace>
[   89.918299]  => rcu_irq_exit
[   89.918300]  => irq_exit
[   89.918302]  => smp_apic_timer_interrupt
[   89.918304]  => apic_timer_interrupt
[   89.918305]  => cpu_idle
[   89.918307]  => rest_init
[   89.918308]  => start_kernel
[   89.918310]  => x86_64_start_reservations
[   89.918333]   <idle>-0       0d... 89909082us : <stack trace>
[   89.918336]  => rcu_irq_enter
[   89.918337]  => irq_enter
[   89.918339]  => smp_apic_timer_interrupt
[   89.918341]  => apic_timer_interrupt
[   89.918342]  => cpu_idle
[   89.918344]  => rest_init
[   89.918345]  => start_kernel
[   89.918347]  => x86_64_start_reservations
[   89.918370]   <idle>-0       0dN.. 89909122us : <stack trace>
[   89.918372]  => rcu_irq_exit
[   89.918374]  => irq_exit
[   89.918376]  => smp_apic_timer_interrupt
[   89.918377]  => apic_timer_interrupt
[   89.918379]  => cpu_idle
[   89.918381]  => rest_init
[   89.918382]  => start_kernel
[   89.918384]  => x86_64_start_reservations
[   89.918408]   <idle>-0       0d... 89912671us : <stack trace>
[   89.918410]  => rcu_irq_enter
[   89.918412]  => irq_enter
[   89.918413]  => do_IRQ
[   89.918415]  => ret_from_intr
[   89.918416]  => cpu_idle
[   89.918418]  => rest_init
[   89.918419]  => start_kernel
[   89.918421]  => x86_64_start_reservations
[   89.918443]   <idle>-0       0d... 89912711us : <stack trace>
[   89.918446]  => rcu_irq_exit
[   89.918448]  => irq_exit
[   89.918449]  => do_IRQ
[   89.918451]  => ret_from_intr
[   89.918452]  => cpu_idle
[   89.918454]  => rest_init
[   89.918455]  => start_kernel
[   89.918457]  => x86_64_start_reservations
[   89.918480]   <idle>-0       0d... 89913074us : <stack trace>
[   89.918482]  => rcu_irq_enter
[   89.918484]  => irq_enter
[   89.918486]  => smp_apic_timer_interrupt
[   89.918488]  => apic_timer_interrupt
[   89.918489]  => cpu_idle
[   89.918491]  => rest_init
[   89.918492]  => start_kernel
[   89.918494]  => x86_64_start_reservations
[   89.918517]   <idle>-0       0dN.. 89913130us : <stack trace>
[   89.918519]  => rcu_irq_exit
[   89.918521]  => irq_exit
[   89.918522]  => smp_apic_timer_interrupt
[   89.918524]  => apic_timer_interrupt
[   89.918526]  => cpu_idle
[   89.918527]  => rest_init
[   89.918529]  => start_kernel
[   89.918530]  => x86_64_start_reservations
[   89.918552]   <idle>-0       0d... 89913196us : <stack trace>
[   89.918555]  => rcu_enter_nohz
[   89.918556]  => tick_nohz_stop_sched_tick
[   89.918558]  => cpu_idle
[   89.918560]  => rest_init
[   89.918561]  => start_kernel
[   89.918563]  => x86_64_start_reservations
[   89.918565]  => x86_64_start_kernel
[   89.918569] ---------------------------------

also have

[    1.200814] ftrace: allocating 51307 entries in 202 pages
[    1.226119] ------------[ cut here ]------------
[    1.227489] WARNING: at kernel/trace/ftrace.c:984 ftrace_bug+0x79/0x189()
[    1.237463] Hardware name: Sun Fire X4800 M2 
[    1.238845] Modules linked in:
[    1.240113] Pid: 0, comm: swapper Not tainted 2.6.39-rc7-tip-yh-05281-g8e9254b-dirty #1019
[    1.260717] Call Trace:
[    1.261389]  [<ffffffff81080144>] warn_slowpath_common+0x85/0x9d
[    1.278249]  [<ffffffff814d5d97>] ? sci_base_state_machine_get_state+0x5/0xe
[    1.280207]  [<ffffffff814d5d97>] ? sci_base_state_machine_get_state+0x5/0xe
[    1.300928]  [<ffffffff81080176>] warn_slowpath_null+0x1a/0x1c
[    1.317318]  [<ffffffff810d9457>] ftrace_bug+0x79/0x189
[    1.318672]  [<ffffffff814d5d97>] ? sci_base_state_machine_get_state+0x5/0xe
[    1.339872]  [<ffffffff810d9699>] ftrace_update_code+0x75/0x118
[    1.341795]  [<ffffffff81bda3aa>] ? csum_partial_copy_from_user+0x11/0xe7
[    1.357948]  [<ffffffff810d9873>] ftrace_process_locs+0x69/0x80
[    1.359587]  [<ffffffff8275fd74>] ftrace_init+0x191/0x1b5
[    1.380143]  [<ffffffff82742e34>] start_kernel+0x3ad/0x3bd
[    1.381479]  [<ffffffff827422cc>] x86_64_start_reservations+0x9c/0xa0
[    1.397886]  [<ffffffff827424a8>] x86_64_start_kernel+0x1d8/0x1e3
[    1.399577] ---[ end trace a7919e7f17c0a725 ]---
[    1.420373] ftrace failed to modify [<ffffffff814d5d97>] sci_base_state_machine_get_state+0x5/0xe
[    1.437443]  actual: a5:f3:75:00:8b

<snip>

So, the warning triggered there. But the pairing looks actually good, given we had an interrupt right before that and it has called irq_enter and irq_exit.

I have no clue about what happened there.

It may be easier if we have the value of dynticks and dynticks_nesting.

Can you please test the following branch?

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
rcu/debug

It's Paul's branch + the early_initcall fix + the following patch:

---
commit 14667f347dea62d9e5a08e0f614840e50f73002c

Author: Frederic Weisbecker <[email protected]>
Date:   Thu May 19 16:25:19 2011 +0200

rcu: Trace dynticks internal values

To debug some nasty count bug.

index f30aea3..49d6348 100644
@@ -349,6 +349,7 @@ void rcu_enter_nohz(void)
 	local_irq_save(flags);
 	trace_dump_stack();
 	rdtp = &__get_cpu_var(rcu_dynticks);
+	trace_printk("%x %x\n", atomic_read(&rdtp->dynticks), rdtp->dynticks_nesting);
 	if (WARN_ON_ONCE(rdtp->dynticks_nesting != 1))
 		ftrace_dump(DUMP_ORIG);
 	rdtp->dynticks_nesting = 1;

@@ -388,6 +389,7 @@ void rcu_exit_nohz(void)
 	local_irq_save(flags);
 	trace_dump_stack();
 	rdtp = &__get_cpu_var(rcu_dynticks);
+	trace_printk("%x %x\n", atomic_read(&rdtp->dynticks), rdtp->dynticks_nesting);
 	if (WARN_ON_ONCE(rdtp->dynticks_nesting != 0))
 		ftrace_dump(DUMP_ORIG);
 	rdtp->dynticks_nesting = 0;

@@ -463,9 +465,12 @@ void rcu_nmi_exit(void)
 void rcu_irq_enter(void)
 {
 	unsigned long flags;
+	struct rcu_dynticks *rdtp;
 
 	local_irq_save(flags);
 	trace_dump_stack();
+	rdtp = &__get_cpu_var(rcu_dynticks);
+	trace_printk("%x %x\n", atomic_read(&rdtp->dynticks), rdtp->dynticks_nesting);
 	__rcu_exit_nohz();
 	local_irq_restore(flags);
 }

@@ -480,9 +485,12 @@ void rcu_irq_enter(void)
 void rcu_irq_exit(void)
 {
 	unsigned long flags;
+	struct rcu_dynticks *rdtp;
 
 	local_irq_save(flags);
 	trace_dump_stack();
+	rdtp = &__get_cpu_var(rcu_dynticks);
+	trace_printk("%x %x\n", atomic_read(&rdtp->dynticks), rdtp->dynticks_nesting);
 	__rcu_enter_nohz();
 	local_irq_restore(flags);
 }

[   85.194251] ------------[ cut here ]------------
[   85.194260] WARNING: at kernel/rcutree.c:353 rcu_enter_nohz+0x63/0xa5()
[   85.194262] Hardware name: Sun Fire X4800 M2 
[   85.194264] Modules linked in:
[   85.194268] Pid: 0, comm: swapper Tainted: G        W   2.6.39-tip-yh-05046-g8a9149b-dirty #1021
[   85.194270] Call Trace:
[   85.194291]  [<ffffffff810800f4>] warn_slowpath_common+0x85/0x9d
[   85.194296]  [<ffffffff81080126>] warn_slowpath_null+0x1a/0x1c
[   85.194301]  [<ffffffff810d3326>] rcu_enter_nohz+0x63/0xa5
[   85.194311]  [<ffffffff810ab161>] tick_nohz_stop_sched_tick+0x27d/0x366
[   85.194317]  [<ffffffff810391bc>] cpu_idle+0x7a/0xcc
[   85.194326]  [<ffffffff81bda823>] rest_init+0xb7/0xbe
[   85.194331]  [<ffffffff81bda76c>] ? csum_partial_copy_generic+0x16c/0x16c
[   85.194338]  [<ffffffff82742e39>] start_kernel+0x3b2/0x3bd
[   85.194344]  [<ffffffff827422cc>] x86_64_start_reservations+0x9c/0xa0
[   85.194348]  [<ffffffff827424a8>] x86_64_start_kernel+0x1d8/0x1e3
[   85.194351] ---[ end trace a7919e7f17c0a726 ]---
[   85.194366] Dumping ftrace buffer:
[   85.194391] ---------------------------------
[   85.194415] CPU:0 [LOST 74512 EVENTS]
[   85.194416]   <idle>-0       0d... 85121004us : <stack trace>
[   85.194418]  => rcu_irq_enter
[   85.194418]  => irq_enter
[   85.194419]  => smp_apic_timer_interrupt
[   85.194420]  => apic_timer_interrupt
[   85.194421]  => cpu_idle
[   85.194421]  => rest_init
[   85.194422]  => start_kernel
[   85.194423]  => x86_64_start_reservations
[   85.194430]   <idle>-0       0d... 85121009us : rcu_irq_enter: 1 49
[   85.194441]   <idle>-0       0dN.. 85121429us : <stack trace>
[   85.194443]  => rcu_irq_exit
[   85.194443]  => irq_exit
[   85.194444]  => smp_apic_timer_interrupt
[   85.194445]  => apic_timer_interrupt
[   85.194446]  => cpu_idle
[   85.194447]  => rest_init
[   85.194447]  => start_kernel
[   85.194448]  => x86_64_start_reservations
[   85.194454]   <idle>-0       0dN.. 85121433us : rcu_irq_exit: 1 4a
[   85.194465]   <idle>-0       0d... 85124995us : <stack trace>
[   85.194466]  => rcu_irq_enter
[   85.194467]  => irq_enter
[   85.194468]  => smp_apic_timer_interrupt
[   85.194469]  => apic_timer_interrupt
[   85.194470]  => cpu_idle
[   85.194470]  => rest_init
[   85.194471]  => start_kernel
[   85.194472]  => x86_64_start_reservations
[   85.194477]   <idle>-0       0d... 85125007us : rcu_irq_enter: 1 49
[   85.194488]   <idle>-0       0dN.. 85125366us : <stack trace>
[   85.194489]  => rcu_irq_exit
[   85.194490]  => irq_exit
[   85.194491]  => smp_apic_timer_interrupt
[   85.194492]  => apic_timer_interrupt
[   85.194492]  => cpu_idle
[   85.194493]  => rest_init
[   85.194494]  => start_kernel
[   85.194494]  => x86_64_start_reservations
[   85.194500]   <idle>-0       0dN.. 85125371us : rcu_irq_exit: 1 4a
[   85.194511]   <idle>-0       0d... 85128990us : <stack trace>
[   85.194512]  => rcu_irq_enter
[   85.194513]  => irq_enter
[   85.194514]  => smp_apic_timer_interrupt
[   85.194514]  => apic_timer_interrupt
[   85.194515]  => cpu_idle
[   85.194516]  => rest_init
[   85.194517]  => start_kernel
[   85.194517]  => x86_64_start_reservations
[   85.194523]   <idle>-0       0d... 85129001us : rcu_irq_enter: 1 49
[   85.194534]   <idle>-0       0dN.. 85129033us : <stack trace>
[   85.194535]  => rcu_irq_exit
[   85.194536]  => irq_exit
[   85.194536]  => smp_apic_timer_interrupt
[   85.194537]  => apic_timer_interrupt
[   85.194538]  => cpu_idle
[   85.194539]  => rest_init
[   85.194539]  => start_kernel
[   85.194540]  => x86_64_start_reservations
[   85.194546]   <idle>-0       0dN.. 85129043us : rcu_irq_exit: 1 4a
[   85.194556]   <idle>-0       0d... 85132981us : <stack trace>
[   85.194558]  => rcu_irq_enter
[   85.194558]  => irq_enter
[   85.194559]  => smp_apic_timer_interrupt
[   85.194560]  => apic_timer_interrupt
[   85.194561]  => cpu_idle
[   85.194561]  => rest_init
[   85.194562]  => start_kernel
[   85.194563]  => x86_64_start_reservations
[   85.194568]   <idle>-0       0d... 85132986us : rcu_irq_enter: 1 49
[   85.194579]   <idle>-0       0dN.. 85133066us : <stack trace>
[   85.194580]  => rcu_irq_exit
[   85.194581]  => irq_exit
[   85.194582]  => smp_apic_timer_interrupt
[   85.194583]  => apic_timer_interrupt
[   85.194583]  => cpu_idle
[   85.194584]  => rest_init
[   85.194585]  => start_kernel
[   85.194586]  => x86_64_start_reservations
[   85.194592]   <idle>-0       0dN.. 85133077us : rcu_irq_exit: 1 4a
[   85.194602]   <idle>-0       0d... 85136976us : <stack trace>
[   85.194604]  => rcu_irq_enter
[   85.194604]  => irq_enter
[   85.194605]  => smp_apic_timer_interrupt
[   85.194606]  => apic_timer_interrupt
[   85.194607]  => cpu_idle
[   85.194608]  => rest_init
[   85.194608]  => start_kernel
[   85.194609]  => x86_64_start_reservations
[   85.194615]   <idle>-0       0d... 85136987us : rcu_irq_enter: 1 49
[   85.194626]   <idle>-0       0dN.. 85137062us : <stack trace>
[   85.194627]  => rcu_irq_exit
[   85.194628]  => irq_exit
[   85.194628]  => smp_apic_timer_interrupt
[   85.194629]  => apic_timer_interrupt
[   85.194630]  => cpu_idle
[   85.194631]  => rest_init
[   85.194631]  => start_kernel
[   85.194632]  => x86_64_start_reservations
[   85.194638]   <idle>-0       0dN.. 85137072us : rcu_irq_exit: 1 4a
[   85.194649]   <idle>-0       0d... 85140967us : <stack trace>
[   85.194650]  => rcu_irq_enter
[   85.194651]  => irq_enter
[   85.194651]  => smp_apic_timer_interrupt
[   85.194652]  => apic_timer_interrupt
[   85.194653]  => cpu_idle
[   85.194653]  => rest_init
[   85.194654]  => start_kernel
[   85.194655]  => x86_64_start_reservations
[   85.194661]   <idle>-0       0d... 85140974us : rcu_irq_enter: 1 49
[   85.194671]   <idle>-0       0dN.. 85141463us : <stack trace>
[   85.194673]  => rcu_irq_exit
[   85.194673]  => irq_exit
[   85.194674]  => smp_apic_timer_interrupt
[   85.194675]  => apic_timer_interrupt
[   85.194676]  => cpu_idle
[   85.194676]  => rest_init
[   85.194677]  => start_kernel
[   85.194678]  => x86_64_start_reservations
[   85.194683]   <idle>-0       0dN.. 85141467us : rcu_irq_exit: 1 4a
[   85.194694]   <idle>-0       0d... 85144960us : <stack trace>
[   85.194695]  => rcu_irq_enter
[   85.194696]  => irq_enter
[   85.194697]  => smp_apic_timer_interrupt
[   85.194698]  => apic_timer_interrupt
[   85.194698]  => cpu_idle
[   85.194699]  => rest_init
[   85.194700]  => start_kernel
[   85.194700]  => x86_64_start_reservations
[   85.194706]   <idle>-0       0d... 85144967us : rcu_irq_enter: 1 49
[   85.194717]   <idle>-0       0dN.. 85145234us : <stack trace>
[   85.194718]  => rcu_irq_exit
[   85.194719]  => irq_exit
[   85.194720]  => smp_apic_timer_interrupt
[   85.194720]  => apic_timer_interrupt
[   85.194721]  => cpu_idle
[   85.194722]  => rest_init
[   85.194722]  => start_kernel
[   85.194723]  => x86_64_start_reservations
[   85.194729]   <idle>-0       0dN.. 85145238us : rcu_irq_exit: 1 4a
[   85.194740]   <idle>-0       0d... 85148953us : <stack trace>
[   85.194741]  => rcu_irq_enter
[   85.194742]  => irq_enter
[   85.194742]  => smp_apic_timer_interrupt
[   85.194743]  => apic_timer_interrupt
[   85.194744]  => cpu_idle
[   85.194744]  => rest_init
[   85.194745]  => start_kernel
[   85.194746]  => x86_64_start_reservations
[   85.194752]   <idle>-0       0d... 85148958us : rcu_irq_enter: 1 49
[   85.194762]   <idle>-0       0dN.. 85149096us : <stack trace>
[   85.194764]  => rcu_irq_exit
[   85.194764]  => irq_exit
[   85.194765]  => smp_apic_timer_interrupt
[   85.194766]  => apic_timer_interrupt
[   85.194767]  => cpu_idle
[   85.194767]  => rest_init
[   85.194768]  => start_kernel
[   85.194769]  => x86_64_start_reservations
[   85.194774]   <idle>-0       0dN.. 85149101us : rcu_irq_exit: 1 4a
[   85.194785]   <idle>-0       0d... 85152946us : <stack trace>
[   85.194786]  => rcu_irq_enter
[   85.194787]  => irq_enter
[   85.194788]  => smp_apic_timer_interrupt
[   85.194789]  => apic_timer_interrupt
[   85.194789]  => cpu_idle
[   85.194790]  => rest_init
[   85.194791]  => start_kernel
[   85.194791]  => x86_64_start_reservations
[   85.194797]   <idle>-0       0d... 85152953us : rcu_irq_enter: 1 49
[   85.194808]   <idle>-0       0dN.. 85153081us : <stack trace>
[   85.194809]  => rcu_irq_exit
[   85.194810]  => irq_exit
[   85.194811]  => smp_apic_timer_interrupt
[   85.194812]  => apic_timer_interrupt
[   85.194813]  => cpu_idle
[   85.194813]  => rest_init
[   85.194814]  => start_kernel
[   85.194815]  => x86_64_start_reservations
[   85.194821]   <idle>-0       0dN.. 85153085us : rcu_irq_exit: 1 4a
[   85.194832]   <idle>-0       0d... 85156939us : <stack trace>
[   85.194833]  => rcu_irq_enter
[   85.194834]  => irq_enter
[   85.194834]  => smp_apic_timer_interrupt
[   85.194835]  => apic_timer_interrupt
[   85.194836]  => cpu_idle
[   85.194837]  => rest_init
[   85.194837]  => start_kernel
[   85.194838]  => x86_64_start_reservations
[   85.194844]   <idle>-0       0d... 85156948us : rcu_irq_enter: 1 49
[   85.194854]   <idle>-0       0dN.. 85157535us : <stack trace>
[   85.194856]  => rcu_irq_exit
[   85.194856]  => irq_exit
[   85.194857]  => smp_apic_timer_interrupt
[   85.194858]  => apic_timer_interrupt
[   85.194859]  => cpu_idle
[   85.194859]  => rest_init
[   85.194860]  => start_kernel
[   85.194861]  => x86_64_start_reservations
[   85.194866]   <idle>-0       0dN.. 85157540us : rcu_irq_exit: 1 4a
[   85.194877]   <idle>-0       0d... 85160932us : <stack trace>
[   85.194878]  => rcu_irq_enter
[   85.194879]  => irq_enter
[   85.194880]  => smp_apic_timer_interrupt
[   85.194881]  => apic_timer_interrupt
[   85.194881]  => cpu_idle
[   85.194882]  => rest_init
[   85.194883]  => start_kernel
[   85.194883]  => x86_64_start_reservations
[   85.194889]   <idle>-0       0d... 85160941us : rcu_irq_enter: 1 49
[   85.194900]   <idle>-0       0dN.. 85161127us : <stack trace>
[   85.194901]  => rcu_irq_exit
[   85.194902]  => irq_exit
[   85.194903]  => smp_apic_timer_interrupt
[   85.194903]  => apic_timer_interrupt
[   85.194904]  => cpu_idle
[   85.194905]  => rest_init
[   85.194905]  => start_kernel
[   85.194906]  => x86_64_start_reservations
[   85.194912]   <idle>-0       0dN.. 85161132us : rcu_irq_exit: 1 4a
[   85.194923]   <idle>-0       0d... 85164925us : <stack trace>
[   85.194924]  => rcu_irq_enter
[   85.194925]  => irq_enter
[   85.194925]  => smp_apic_timer_interrupt
[   85.194926]  => apic_timer_interrupt
[   85.194927]  => cpu_idle
[   85.194928]  => rest_init
[   85.194928]  => start_kernel
[   85.194929]  => x86_64_start_reservations
[   85.194935]   <idle>-0       0d... 85164930us : rcu_irq_enter: 1 49
[   85.194945]   <idle>-0       0dN.. 85165009us : <stack trace>
[   85.194947]  => rcu_irq_exit
[   85.194947]  => irq_exit
[   85.194948]  => smp_apic_timer_interrupt
[   85.194949]  => apic_timer_interrupt
[   85.194950]  => cpu_idle
[   85.194950]  => rest_init
[   85.194951]  => start_kernel
[   85.194952]  => x86_64_start_reservations
[   85.194957]   <idle>-0       0dN.. 85165013us : rcu_irq_exit: 1 4a
[   85.194968]   <idle>-0       0d... 85168920us : <stack trace>
[   85.194969]  => rcu_irq_enter
[   85.194970]  => irq_enter
[   85.194971]  => smp_apic_timer_interrupt
[   85.194972]  => apic_timer_interrupt
[   85.194972]  => cpu_idle
[   85.194973]  => rest_init
[   85.194974]  => start_kernel
[   85.194974]  => x86_64_start_reservations
[   85.194980]   <idle>-0       0d... 85168931us : rcu_irq_enter: 1 49
[   85.194991]   <idle>-0       0dN.. 85168970us : <stack trace>
[   85.194992]  => rcu_irq_exit
[   85.194993]  => irq_exit
[   85.194993]  => smp_apic_timer_interrupt
[   85.194994]  => apic_timer_interrupt
[   85.194995]  => cpu_idle
[   85.194996]  => rest_init
[   85.194996]  => start_kernel
[   85.194997]  => x86_64_start_reservations
[   85.195003]   <idle>-0       0dN.. 85168980us : rcu_irq_exit: 1 4a
[   85.195014]   <idle>-0       0d... 85172911us : <stack trace>
[   85.195015]  => rcu_irq_enter
[   85.195016]  => irq_enter
[   85.195016]  => smp_apic_timer_interrupt
[   85.195017]  => apic_timer_interrupt
[   85.195018]  => cpu_idle
[   85.195019]  => rest_init
[   85.195020]  => start_kernel
[   85.195020]  => x86_64_start_reservations
[   85.195026]   <idle>-0       0d... 85172916us : rcu_irq_enter: 1 49
[   85.195037]   <idle>-0       0dN.. 85173155us : <stack trace>
[   85.195038]  => rcu_irq_exit
[   85.195039]  => irq_exit
[   85.195040]  => smp_apic_timer_interrupt
[   85.195041]  => apic_timer_interrupt
[   85.195042]  => cpu_idle
[   85.195042]  => rest_init
[   85.195043]  => start_kernel
[   85.195044]  => x86_64_start_reservations
[   85.195050]   <idle>-0       0dN.. 85173160us : rcu_irq_exit: 1 4a
[   85.195060]   <idle>-0       0d... 85176904us : <stack trace>
[   85.195061]  => rcu_irq_enter
[   85.195062]  => irq_enter
[   85.195063]  => smp_apic_timer_interrupt
[   85.195064]  => apic_timer_interrupt
[   85.195064]  => cpu_idle
[   85.195065]  => rest_init
[   85.195066]  => start_kernel
[   85.195066]  => x86_64_start_reservations
[   85.195072]   <idle>-0       0d... 85176913us : rcu_irq_enter: 1 49
[   85.195083]   <idle>-0       0dN.. 85177864us : <stack trace>
[   85.195084]  => rcu_irq_exit
[   85.195085]  => irq_exit
[   85.195086]  => smp_apic_timer_interrupt
[   85.195086]  => apic_timer_interrupt
[   85.195087]  => cpu_idle
[   85.195088]  => rest_init
[   85.195088]  => start_kernel
[   85.195089]  => x86_64_start_reservations
[   85.195095]   <idle>-0       0dN.. 85177869us : rcu_irq_exit: 1 4a
[   85.195106]   <idle>-0       0d... 85180897us : <stack trace>
[   85.195107]  => rcu_irq_enter
[   85.195108]  => irq_enter
[   85.195108]  => smp_apic_timer_interrupt
[   85.195109]  => apic_timer_interrupt
[   85.195110]  => cpu_idle
[   85.195111]  => rest_init
[   85.195111]  => start_kernel
[   85.195112]  => x86_64_start_reservations
[   85.195118]   <idle>-0       0d... 85180907us : rcu_irq_enter: 1 49
[   85.195129]   <idle>-0       0dN.. 85181665us : <stack trace>
[   85.195130]  => rcu_irq_exit
[   85.195130]  => irq_exit
[   85.195131]  => smp_apic_timer_interrupt
[   85.195132]  => apic_timer_interrupt
[   85.195133]  => cpu_idle
[   85.195133]  => rest_init
[   85.195134]  => start_kernel
[   85.195135]  => x86_64_start_reservations
[   85.195141]   <idle>-0       0dN.. 85181669us : rcu_irq_exit: 1 4a
[   85.195152]   <idle>-0       0d... 85184890us : <stack trace>
[   85.195153]  => rcu_irq_enter
[   85.195154]  => irq_enter
[   85.195154]  => smp_apic_timer_interrupt
[   85.195155]  => apic_timer_interrupt
[   85.195156]  => cpu_idle
[   85.195157]  => rest_init
[   85.195157]  => start_kernel
[   85.195158]  => x86_64_start_reservations
[   85.195164]   <idle>-0       0d... 85184895us : rcu_irq_enter: 1 49
[   85.195175]   <idle>-0       0dN.. 85185146us : <stack trace>
[   85.195176]  => rcu_irq_exit
[   85.195177]  => irq_exit
[   85.195177]  => smp_apic_timer_interrupt
[   85.195178]  => apic_timer_interrupt
[   85.195179]  => cpu_idle
[   85.195179]  => rest_init
[   85.195180]  => start_kernel
[   85.195181]  => x86_64_start_reservations
[   85.195187]   <idle>-0       0dN.. 85185151us : rcu_irq_exit: 1 4a
[   85.195203]    <...>-6       0d... 85188881us : <stack trace>
[   85.195204]  => rcu_irq_enter
[   85.195205]  => irq_enter
[   85.195206]  => smp_apic_timer_interrupt
[   85.195206]  => apic_timer_interrupt
[   85.195207]  => cpu_stopper_thread
[   85.195208]  => kthread
[   85.195209]  => kernel_thread_helper
[   85.195215]    <...>-6       0d... 85188894us : rcu_irq_enter: 1 49
[   85.195225]    <...>-6       0d... 85188982us : <stack trace>
[   85.195226]  => rcu_irq_exit
[   85.195227]  => irq_exit
[   85.195228]  => smp_apic_timer_interrupt
[   85.195229]  => apic_timer_interrupt
[   85.195230]  => cpu_stopper_thread
[   85.195231]  => kthread
[   85.195231]  => kernel_thread_helper
[   85.195237]    <...>-6       0d... 85188989us : rcu_irq_exit: 1 4a
[   85.195249]   <idle>-0       0d... 85190288us : <stack trace>
[   85.195250]  => rcu_irq_enter
[   85.195251]  => irq_enter
[   85.195251]  => do_IRQ
[   85.195252]  => ret_from_intr
[   85.195253]  => cpu_idle
[   85.195253]  => rest_init
[   85.195254]  => start_kernel
[   85.195255]  => x86_64_start_reservations
[   85.195261]   <idle>-0       0d... 85190299us : rcu_irq_enter: 1 49
[   85.195271]   <idle>-0       0d... 85190336us : <stack trace>
[   85.195272]  => rcu_irq_exit
[   85.195273]  => irq_exit
[   85.195274]  => do_IRQ
[   85.195274]  => ret_from_intr
[   85.195275]  => cpu_idle
[   85.195276]  => rest_init
[   85.195276]  => start_kernel
[   85.195277]  => x86_64_start_reservations
[   85.195283]   <idle>-0       0d... 85190346us : rcu_irq_exit: 1 4a
[   85.195293]   <idle>-0       0d... 85192902us : <stack trace>
[   85.195295]  => rcu_irq_enter
[   85.195295]  => irq_enter
[   85.195296]  => smp_apic_timer_interrupt
[   85.195297]  => apic_timer_interrupt
[   85.195298]  => cpu_idle
[   85.195298]  => rest_init
[   85.195299]  => start_kernel
[   85.195300]  => x86_64_start_reservations
[   85.195305]   <idle>-0       0d... 85193714us : rcu_irq_enter: 1 49
[   85.195316]   <idle>-0       0dN.. 85193856us : <stack trace>
[   85.195317]  => rcu_irq_exit
[   85.195318]  => irq_exit
[   85.195319]  => smp_apic_timer_interrupt
[   85.195320]  => apic_timer_interrupt
[   85.195320]  => cpu_idle
[   85.195321]  => rest_init
[   85.195322]  => start_kernel
[   85.195322]  => x86_64_start_reservations
[   85.195328]   <idle>-0       0dN.. 85194210us : rcu_irq_exit: 1 4a
[   85.195338]   <idle>-0       0d... 85194247us : <stack trace>
[   85.195340]  => rcu_enter_nohz
[   85.195340]  => tick_nohz_stop_sched_tick
[   85.195341]  => cpu_idle
[   85.195342]  => rest_init
[   85.195342]  => start_kernel
[   85.195343]  => x86_64_start_reservations
[   85.195344]  => x86_64_start_kernel
[   85.195350]   <idle>-0       0d... 85194250us : rcu_enter_nohz: 1 49
[   85.195352] ---------------------------------

So it's the dynticks_nesting going crazy. As if we had rcu_irq_enter() without rcu_irq_exit().

I see you have CONFIG_DEBUG_LOCKING_API_SELFTESTS=y
and the locking api selftest is doing a strange thing: if we look at HARDIRQ_ENTER(), it calls irq_enter(), but HARDIRQ_EXIT() only calls __irq_exit(). Which means it lacks the rcu_irq_exit().

So, if I understood correctly the thing there, some selftests simulating the hardirq context are unbalancing the rcu state.

Does that help if you unset CONFIG_DEBUG_LOCKING_API_SELFTESTS ?

yes, after unset that, no warning and delay...

Thanks

HARDIRQ_ENTER() maps to irq_enter() which calls rcu_irq_enter(). But HARDIRQ_EXIT() maps to __irq_exit() which doesn't call rcu_irq_exit().

So for every locking selftest that simulates hardirq disabled, we create an imbalance in the rcu extended quiescent state internal state.

As a result, after the first missing rcu_irq_exit(), subsequent irqs won't exit any extended quiescent state the time of the interrupt servicing. Rcu read side critical section inside irqs on that CPU won't be guaranteed anymore.

To fix this, just use __irq_enter() to simulate the hardirq context. This is sufficient for the locking selftests as we don't need to exit any extended quiescent state or perform any check that irqs normally do when they wake up from idle.

As a side effect, this patch should make it possible to restore
"rcu: Decrease memory-barrier usage based on semi-formal proof", which eventually helped finding this bug.

---
 lib/locking-selftest.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index 619313e..507a22f 100644
@@ -144,7 +144,7 @@ static void init_shared_classes(void)
 
 #define HARDIRQ_ENTER()				\
 	local_irq_disable();			\
-	irq_enter();				\
+	__irq_enter();				\
 	WARN_ON(!in_irq());
 
 #define HARDIRQ_EXIT()				\

1.7.3.2

I agree. I will rebase my split-up version, rebase on that, retest and push.

Thanx, Paul

You know, I looked at this code, but failed to see __irq_exit() vs irq_enter()...

Good catch, Frederic, and thanks to Yinghai and Ingo for all the testing!

Thanks a lot for all your testing! I've just proposed a fix, let's see how that goes.

yes. And note that the system does not lock up, but boots up after a really long time - perhaps as a side-effect of very rare timer irqs driving forward the RCU state machine?

Thanks,

Ingo

In the interest of focusing on the code paths that are actually being executed...

Are you guys seeing NMIs at about the time the slowdown occurs?

Thanx, Paul

None that produces a kernel message.

Also, the kernel config has:

# CONFIG_LOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set

So the NMI watchdog ought to be off. This system isnt producing spurious NMIs.

Thanks,

Ingo