memory.c - bad pmd - x86_64

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I have a system with a Tyan 2885 motherboard (S2885-ANRF) that uses dual
Opteron 244 processors. Each processor has 1 GB of memory for a total
of 2 GB. I am using a SATA HD. I am running the latest stock release of
the SMP version of the FC3 kernel for x86_64. uname -a output follows:

Linux maggie 2.6.11-1.14_FC3smp #1 SMP Thu Apr 7 19:36:23 EDT 2005
x86_64 x86_64 x86_64 GNU/Linux

The computer is worldly node for a small cluster of computers. It is
resposible for building a code that is run on the cluster. A shell
script is used to start the build process. Occasionally when the script
is started it crashes and the following messages are place in
/var/log/messages (sorry for the ugly line wrap):

May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4000(0000000000000008).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4010(0000000000000009).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4018(0000000000401b80).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4020(000000000000000b).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4028(0000000000000220).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4030(000000000000000c).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4038(0000000000000220).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4040(000000000000000d).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4048(00000000000001f7).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4050(000000000000000e).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4058(00000000000001f7).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4060(0000000000000017).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4070(000000000000000f).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4078(00007ffffffff098).
May 11 16:26:56 maggie kernel: mm/memory.c:97: bad pmd
ffff81002f6a4098(000034365f363878).

If the shell script is started immediately after the crash it works.
I have been seeing "bad pmd" messages for quite some time and the shell
script that builds the code is not the only event that triggers them.

I'm pretty sure the memory in the machine is fine. I have noticed a
thread on linux-kernel list discussing the problem, but haven't had a
chance to post there yet.

I have appended the output of lspci and lsmod to the end of this message.

Has anyone on this list noticed similar messages?

The linux-kernel thread indicates the problem is x86_64 specific and
seems to be hilighted by Tyan HW.

Any insight would be greatly appreciated.
Pete

/bin/lspci

00:06.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8111 PCI (rev 07)
00:07.0 ISA bridge: Advanced Micro Devices [AMD] AMD-8111 LPC (rev 05)
00:07.1 IDE interface: Advanced Micro Devices [AMD] AMD-8111 IDE (rev 03)
00:07.2 SMBus: Advanced Micro Devices [AMD] AMD-8111 SMBus 2.0 (rev 02)
00:07.3 Bridge: Advanced Micro Devices [AMD] AMD-8111 ACPI (rev 05)
00:07.5 Multimedia audio controller: Advanced Micro Devices [AMD] AMD-8111
AC97 Audio (rev 03)
00:0a.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X Bridge (rev
12)
00:0a.1 PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (rev 01)
00:0b.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8131 PCI-X Bridge (rev
12)
00:0b.1 PIC: Advanced Micro Devices [AMD] AMD-8131 PCI-X APIC (rev 01)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM
Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Miscellaneous Control
00:19.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
HyperTransport Technology Configuration
00:19.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Address Map
00:19.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM
Controller
00:19.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Miscellaneous Control
02:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit
Ethernet (rev 10)
02:09.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5703X Gigabit
Ethernet (rev 02)
03:00.0 USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB (rev 0b)
03:00.1 USB Controller: Advanced Micro Devices [AMD] AMD-8111 USB (rev 0b)
03:0b.0 Unknown mass storage controller: Silicon Image, Inc. (formerly CMD
Technology Inc) SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02)
03:0c.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22/A IEEE-1394a-2000
Controller (PHY/Link)
04:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-8151 System Controller
(rev 13)
04:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-8151 AGP Bridge (rev 13)
05:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200]
(rev a1)


/sbin/lsmod

Module                  Size  Used by
md5                     5953  1
ipv6                  297665  22
parport_pc             32809  0
lp                     16145  0
parport                45773  2 parport_pc,lp
autofs4                24521  0
sunrpc                169017  1
pcmcia                 30549  0
yenta_socket           25033  0
rsrc_nonstatic         11969  1 yenta_socket
pcmcia_core            57241  3 pcmcia,yenta_socket,rsrc_nonstatic
video                  20169  0
button                  9185  0
battery                12233  0
ac                      6857  0
ohci1394               38361  0
ieee1394              385721  1 ohci1394
ohci_hcd               25429  0
i2c_amd8111             8129  0
i2c_core               28353  1 i2c_amd8111
hw_random               7393  0
snd_intel8x0           38977  0
snd_ac97_codec         91537  1 snd_intel8x0
snd_pcm_oss            62193  0
snd_mixer_oss          22209  1 snd_pcm_oss
snd_pcm               109257  3 snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_timer              29897  1 snd_pcm
snd                    65417  6
snd_intel8x0,snd_ac97_codec,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore              12641  1 snd
snd_page_alloc         13513  2 snd_intel8x0,snd_pcm
r8169                  33485  0
tg3                    91717  0
floppy                 68881  0
dm_snapshot            19713  0
dm_zero                 4033  0
dm_mirror              25553  0
ext3                  148561  2
jbd                    69105  1 ext3
dm_mod                 69761  6 dm_snapshot,dm_zero,dm_mirror
sata_sil               11589  2
libata                 54601  1 sata_sil
sd_mod                 20929  3
scsi_mod              155665  2 libata,sd_mod



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