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

["Prasanna S. Panchamukhi" <prasanna.panchamukhi@riverbed.com>]

On Thu, Apr 29, 2010 at 03:13:42PM -0700, Keith Mannthey wrote:
> 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.

Shouldn't the edac driver be reporting Uncorrectable Errors even 
before ..BIOS detects the fatal error and freezes the box?
Did someone already tested the 2-bit error injection and reporting
on AMD64?
Did the edac driver reported Uncorrectable Errors on other architectures
Powerpc/Intel?

Thanks
Prasanna


> 
> 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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> 

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