Re: EDAC linux-2.6.34-rc5 non correctable errors not reported on AMD64 opteron

[Keith Mannthey <kmannth@us.ibm.com>]

On Thu, 2010-04-29 at 11:30 -0700, Prasanna S. Panchamukhi wrote:
> Hi Doug,
> 
> I am testing 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.

I would have to recheck the specs to be 100% sure but I would consider
double bit errors to be fatal on normal Opteron boxes. There is a good
chance your BIOS detects the fatal error and freezes the box to prevent
data corruption.

Thanks,
  Keith 

> 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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