- use-the-new-percpu-interface-for-shared-data.patch removed from -mm tree
[email protected]
tree noticeThe patch titled
Use the new percpu interface for shared data
has been removed from the -mm tree. Its filename was
use-the-new-percpu-interface-for-shared-data.patch
This patch was dropped because it had testing failures
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Subject: Use the new percpu interface for shared data
From: Fenghua Yu <[email protected]>
Currently most of the per cpu data, which is accessed by different cpus, has a ____cacheline_aligned_in_smp attribute. Move all this data to the new per cpu shared data section: .data.percpu.shared_aligned.
This will seperate the percpu data which is referenced frequently by other cpus from the local only percpu data.
Signed-off-by Fenghua Yu <[email protected]>
Acked-by Suresh Siddha <[email protected]>
Cc Rusty Russell <[email protected]>
Cc Christoph Lameter <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
---
arch/i386/kernel/init_task.c | 2 +- arch/i386/kernel/irq.c | 2 +- arch/ia64/kernel/smp.c | 2 +- arch/x86_64/kernel/init_task.c | 2 +- kernel/sched.c | 2 +- 5 files changed, 5 insertions(+), 5 deletions(-)
arch/i386/kernel/init_task.c renamed from arch/i386/kernel/init_task.c~use-the-new-percpu-interface-for-shared-data +1 -1
@@ -42,5 +42,5 @@ EXPORT_SYMBOL(init_task);* per-CPU TSS segments. Threads are completely 'soft' on Linux, * no more per-task TSS's. */ -DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS; +DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
arch/i386/kernel/irq.c renamed from arch/i386/kernel/irq.c~use-the-new-percpu-interface-for-shared-data +1 -1
@@ -21,7 +21,7 @@#include <asm/apic.h> #include <asm/uaccess.h> -DEFINE_PER_CPU (irq_cpustat_t, irq_stat)____cacheline_internodealigned_in_smp ; +DEFINE_PER_CPU_SHARED_ALIGNED (irq_cpustat_t, irq_stat);EXPORT_PER_CPU_SYMBOL (irq_stat); DEFINE_PER_CPU(struct pt_regs *, irq_regs);
arch/ia64/kernel/smp.c renamed from arch/ia64/kernel/smp.c~use-the-new-percpu-interface-for-shared-data +1 -1
@@ -82,7 +82,7 @@ static volatile struct call_data_struct#define IPI_KDUMP_CPU_STOP 3/* This needs to be cacheline aligned because it is written to by *other* CPUs. */ -static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned; +static DEFINE_PER_CPU_SHARED_ALIGNED(u64, ipi_operation);extern void cpu_halt (void );
arch/x86_64/kernel/init_task.c renamed from arch/x86_64/kernel/init_task.c~use-the-new-percpu-interface-for-shared-data +1 -1
@@ -44,7 +44,7 @@ EXPORT_SYMBOL(init_task);* section. Since TSS's are completely CPU-local, we want them * on exact cacheline boundaries, to eliminate cacheline ping-pong. */ -DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS; +DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;/* Copies of the original ist values from the tss are only accessed during * debugging, no special alignment required.
kernel/sched.c renamed from kernel/sched.c~use-the-new-percpu-interface-for-shared-data +1 -1
@@ -304,7 +304,7 @@ struct rq {struct lock_class_key rq_lock_key; }; -static DEFINE_PER_CPU(struct rq, runqueues) ____cacheline_aligned_in_smp; +static DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);static DEFINE_MUTEX (sched_hotcpu_mutex);static inline int cpu_of (struct rq *rq)
_
Patches currently in -mm which might be from [email protected] are
use-the-new-percpu-interface-for-shared-data.patch
PATCH 2/2 : use the new percpu interface for shared data - version 4
Currently most of the per cpu data, which is accessed by different cpus, has a ____cacheline_aligned_in_smp attribute. Move all this data to the new per cpu shared data section: .data.percpu.shared_aligned.
This will seperate the percpu data which is referenced frequently by other cpus from the local only percpu data.
Signed-off-by Fenghua Yu <[email protected]>
Acked-by Suresh Siddha <[email protected]>
Cc Rusty Russell <[email protected]>
Cc Christoph Lameter <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
---
arch/i386/kernel/init_task.c | 2 +- arch/i386/kernel/irq.c | 2 +- arch/ia64/kernel/smp.c | 2 +- arch/x86_64/kernel/init_task.c | 2 +- kernel/sched.c | 2 +- 5 files changed, 5 insertions(+), 5 deletions(-)
arch/i386/kernel/init_task.c +1 -1
@@ -42,5 +42,5 @@ EXPORT_SYMBOL(init_task);* per-CPU TSS segments. Threads are completely 'soft' on Linux, * no more per-task TSS's. */ -DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS; +DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;
arch/i386/kernel/irq.c +1 -1
@@ -21,7 +21,7 @@#include <asm/apic.h> #include <asm/uaccess.h> -DEFINE_PER_CPU (irq_cpustat_t, irq_stat)____cacheline_internodealigned_in_smp ; +DEFINE_PER_CPU_SHARED_ALIGNED (irq_cpustat_t, irq_stat);EXPORT_PER_CPU_SYMBOL (irq_stat); DEFINE_PER_CPU(struct pt_regs *, irq_regs);
arch/ia64/kernel/smp.c +1 -1
@@ -82,7 +82,7 @@ static volatile struct call_data_struct#define IPI_KDUMP_CPU_STOP 3/* This needs to be cacheline aligned because it is written to by *other* CPUs. */ -static DEFINE_PER_CPU(u64, ipi_operation) ____cacheline_aligned; +static DEFINE_PER_CPU_SHARED_ALIGNED(u64, ipi_operation);extern void cpu_halt (void );
arch/x86_64/kernel/init_task.c +1 -1
@@ -44,7 +44,7 @@ EXPORT_SYMBOL(init_task);* section. Since TSS's are completely CPU-local, we want them * on exact cacheline boundaries, to eliminate cacheline ping-pong. */ -DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS; +DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS;/* Copies of the original ist values from the tss are only accessed during * debugging, no special alignment required.
kernel/sched.c +1 -1
@@ -304,7 +304,7 @@ struct rq {struct lock_class_key rq_lock_key; }; -static DEFINE_PER_CPU(struct rq, runqueues) ____cacheline_aligned_in_smp; +static DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues);static DEFINE_MUTEX (sched_hotcpu_mutex);static inline int cpu_of (struct rq *rq)