Debian Bug report logs - #739595
mcelog 100-1 does not recognize AMD CPUs properly

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: sacrificial-spam-address@horizon.com

To: submit@bugs.debian.org

Cc: sacrificial-spam-address@horizon.com

Subject: mcelog 100-1 does not recognize AMD CPUs properly

Date: 18 Feb 2014 22:24:22 -0500

Package: mcelog
Version: 100-1
Architecture: i386
Severity: important

I think this is what caused #738927 to be noticed, but this is a separate issue.

# strace -efile,read,ioctl,exit_group mcelog         
execve("/usr/sbin/mcelog", ["mcelog"], [/* 15 vars */]) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/i386-linux-gnu/i686/cmov/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\213^B4\0\0\0"..., 512) = 512
open("/etc/mcelog/mcelog.conf", O_RDONLY) = 3
read(3, "#\n# Example config file for mcel"..., 4096) = 4096
read(3, "the hardware does not report DIM"..., 4096) = 1966
read(3, "", 4096)                       = 0
open("/proc/cpuinfo", O_RDONLY)         = 3
read(3, "processor\t: 0\nvendor_id\t: Authen"..., 1024) = 1024
mcelog: AMD Processor family 16: Please load edac_mce_amd module.
: Success
CPU is unsupported
exit_group(1)                           = ?

The error message appears to be bogus for three separate reasons:
1) The module is named amd64_edac_mod.ko
2) I have CONFIG_EDAC_AMD64=y, so don't need the module
3) It prints the error before doing anything that could theoretically
   detect the presence of such a module in the kernel, so loading
   the module wouldn't helo.

For comparison, specifying the CPU results in normal operation:
# strace -efile,read,ioctl,exit_group mcelog --cpu k8
execve("/usr/sbin/mcelog", ["mcelog", "--cpu", "k8"], [/* 15 vars */]) = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/i386-linux-gnu/i686/cmov/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300\213^B4\0\0\0"..., 512) = 512
open("/etc/mcelog/mcelog.conf", O_RDONLY) = 3
read(3, "#\n# Example config file for mcel"..., 4096) = 4096
read(3, "the hardware does not report DIM"..., 4096) = 1966
read(3, "", 4096)                       = 0
open("/dev/mem", O_RDONLY)              = 3
open("/sys/firmware/efi/systab", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/proc/efi/systab", O_RDONLY)      = -1 ENOENT (No such file or directory)
access("/etc/mcelog", R_OK|X_OK)        = 0
access("/etc/mcelog/cache-error-trigger", R_OK|X_OK) = 0
open("/dev/mcelog", O_RDONLY)           = 3
ioctl(3, MCE_GET_RECORD_LEN or MTRRIOC_SET_ENTRY, 0xfff90ca8) = 0
ioctl(3, MCE_GET_LOG_LEN or MTRRIOC_DEL_ENTRY, 0xfff90ca4) = 0
read(3, "", 2816)                       = 0
exit_group(0)                           = ?

FWIW, here's 1/4 of my /proc/cpuinfo:

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 16
model           : 2
model name      : AMD Phenom(tm) 9850 Quad-Core Processor
stepping        : 3
microcode       : 0x1000083
cpu MHz         : 2500.164
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 nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs hw_pstate npt lbrv svm_lock
bogomips        : 5002.67
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

Message #10 received at 739595-done@bugs.debian.org (full text, mbox, reply):

From: Andrey Rahmatullin <wrar@wrar.name>

To: sacrificial-spam-address@horizon.com, 739595-done@bugs.debian.org

Subject: Re: Bug#739595: mcelog 100-1 does not recognize AMD CPUs properly

Date: Thu, 20 Feb 2014 16:21:40 +0600

On Tue, Feb 18, 2014 at 10:24:22PM -0500, sacrificial-spam-address@horizon.com wrote:
> mcelog: AMD Processor family 16: Please load edac_mce_amd module.
> : Success
> CPU is unsupported
> exit_group(1)                           = ?
> 
> The error message appears to be bogus for three separate reasons:
> 1) The module is named amd64_edac_mod.ko
> 2) I have CONFIG_EDAC_AMD64=y, so don't need the module
> 3) It prints the error before doing anything that could theoretically
>    detect the presence of such a module in the kernel, so loading
>    the module wouldn't helo.
Please direct these suggestions to the upstream at
http://www.mcelog.org/contact.html

-- 
WBR, wRAR

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