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Date:      Thu, 6 Mar 2003 19:44:00 +0000
From:      John Ekins <john.ekins@brightview.com>
To:        freebsd-smp@freebsd.org
Subject:   Regular panic on SMP system
Message-ID:  <20030306194400.4fa939e3.john.ekins@brightview.com>

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Gents/ladies(!),

I'm running several SMP systems but am having regular problems with one of
them. I'm not sure if this is really a question for the SMP or the questions
list, but I'm trying here first.

The machines are dual Xeon 2.4GHz .5MB cache with hyperthreading enabled. They
are less than 2 weeks old. They have identical kernels, which leads me to
believe this is a hardware problem with this particular machine but I'm not
too sure. I'm looking for some advice. I've taken the liberty of posting the
log when the machine crashes below.

I thought that "Fatal trap 12: page fault while in kernel mode" referred to
below suggests that something has eaten up the stack. These machines run Exim
+ named + anti virus software. I consider them lightly loaded.

Does anyone have any suggestions, and if I should post this to questions I
apologise.

Cheers,
John.


Mar  6 10:12:45 mx0 /kernel: Fatal trap 12: page fault while in kernel mode
Mar  6 10:12:45 mx0 /kernel: mp_lock = 03000002; cpuid = 3; lapic.id =
03000000 Mar  6 10:12:45 mx0 /kernel: fault virtual address      = 0x0
Mar  6 10:12:45 mx0 /kernel: fault code         = supervisor write, page not
present Mar  6 10:12:45 mx0 /kernel: instruction pointer        =
0x8:0xc01995ca 
Mar  6 10:12:45 mx0 /kernel: stack pointer              = 0x10:0xe4bdbecc 
Mar  6 10:12:45 mx0 /kernel: frame pointer              = 0x10:0xe4bdbed0 
Mar  6 10:12:45 mx0 /kernel: code segment               = base
0x0, limit 0xfffff, type 0x1b 
Mar  6 10:12:45 mx0 /kernel: = DPL 0, pres 1, def32 1, gran 1 
Mar  6 10:12:45 mx0 /kernel: processor eflags   = interrupt enabled, resume,
IOPL = 0 
Mar  6 10:12:45 mx0 /kernel: current process  = 6 (vnlru) 
Mar  6 10:12:45 mx0 /kernel: interrupt mask             = bio  <- SMP: XXX 
Mar  6 10:12:45 mx0 /kernel: trap number                = 12
Mar  6 10:12:45 mx0 /kernel: panic: page fault
Mar  6 10:12:45 mx0 /kernel: mp_lock = 03000002; cpuid = 3; lapic.id =
03000000 
Mar  6 10:12:45 mx0 /kernel: boot() called on cpu#3
Mar  6 10:12:45 mx0 /kernel: 
Mar  6 10:12:45 mx0 /kernel: syncing disks... 84 3 3 3 3 3 3 3 34 
Mar  6 10:12:45 mx0 /kernel: done
Mar  6 10:12:45 mx0 /kernel: Uptime: 3h8m39s
Mar  6 10:12:45 mx0 /kernel: Automatic reboot in 15 seconds - press a key on
the console to abort 
Mar  6 10:12:45 mx0 /kernel: Rebooting...
Mar  6 10:12:45 mx0 /kernel: cpu_reset called on cpu#3
Mar  6 10:12:45 mx0 /kernel: cpu_reset: Stopping other CPUs
Mar  6 10:12:45 mx0 /kernel: cpu_reset: Restarting BSP
Mar  6 10:12:45 mx0 /kernel: cpu_reset_proxy: Gcrpaub_breeds emtp:  lBoScPk 
dfiodr  nBoStP 
Mar  6 10:12:45 mx0 /kernel: grab mp lock



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