EDAC: Linux-2.6.34-rc5 non correctable errors not reported on AMD64 Opteron

Hi Doug,

I am trying to test Linux-2.6.34-rc5 EDAC driver on AMD64 Opteron. I am able to inject single bit errors and get the edac driver report the correctable errors.
But when I inject 2-bit errors, I did not see any notification or kernel log, the system simply hangs.
This happens with or without edac_mc_panic_on_ue enabled. Please let me know if I am missing something.
Below are the details.

Thanks
Prasanna

Steps to reproduce the problem:

1. Build Linux-2.6.34-rc5 using x86_64_defconfig with following additional config options enabled:
CONFIG_EDAC_DECODE_MCE=y
CONFIG_EDAC_MM_EDAC=y
CONFIG_EDAC_AMD64=m
CONFIG_EDAC_AMD64_ERROR_INJECTION=y
CONFIG_EDAC_E752X=m
CONFIG_EDAC_I82975X=m
CONFIG_EDAC_I3000=m
CONFIG_EDAC_I3200=m
CONFIG_EDAC_X38=m
CONFIG_EDAC_I5400=m
CONFIG_EDAC_I5000=m
CONFIG_EDAC_I5100=m

2. insert the kernel module
#insmod amd64_edac_mod.ko

3. Inject errors

# echo 3 > /sys/devices/system/edac/mc/mc0/inject_section  
# echo 7 > /sys/devices/system/edac/mc/mc0/inject_word
# echo 0x88 > /sys/devices/system/edac/mc/mc0/inject_ecc_vector
# echo 1 > /sys/devices/system/edac/mc/mc0/inject_read
# echo 1 > /sys/devices/system/edac/mc/mc0/inject_write

4. Should hang the system in few minutes.

Additional info:
- AMD64 opteron

# cat /proc/cpuinfo
processor    : 0
vendor_id    : AuthenticAMD
cpu family   : 16
model          : 2
model name    : Quad-Core AMD Opteron(tm) Processor 2346 HE
stepping       : 3
cpu MHz      : 1800.023
cache size    : 512 KB
physical id   : 0
siblings       : 4
core id        : 0
cpu cores    : 4
apicid          : 0
initial apicid    : 0
fpu        : yes
fpu_exception    : yes
cpuid level    : 5
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt 
pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc 
extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic 
cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs npt lbrv svm_lock
bogomips    : 3600.04
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment    : 64
address sizes    : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

processor : 1
vendor_id : AuthenticAMD
cpu family : 16
model : 2
model name : Quad-Core AMD Opteron(tm) Processor 2346 HE
stepping : 3
cpu MHz : 1800.023
cache size : 512 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 4
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs npt lbrv svm_lock
bogomips : 3600.08
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

processor : 2
vendor_id : AuthenticAMD
cpu family : 16
model : 2
model name : Quad-Core AMD Opteron(tm) Processor 2346 HE
stepping : 3
cpu MHz : 1800.023
cache size : 512 KB
physical id : 0
siblings : 4
core id : 2
cpu cores : 4
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs npt lbrv svm_lock
bogomips : 3599.96
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

processor : 3
vendor_id : AuthenticAMD
cpu family : 16
model : 2
model name : Quad-Core AMD Opteron(tm) Processor 2346 HE
stepping : 3
cpu MHz : 1800.023
cache size : 512 KB
physical id : 0
siblings : 4
core id : 3
cpu cores : 4
apicid : 3
initial apicid : 3
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs npt lbrv svm_lock
bogomips : 3600.01
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

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