Date: Fri, 23 Feb 2001 19:56:28 +0200 (SAT) From: John Hay <jhay@icomtek.csir.co.za> To: current@FreeBSD.org Subject: tail -f kernel panic Message-ID: <200102231756.f1NHuTq91448@zibbi.icomtek.csir.co.za>
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I found it is quite easy to panic a -current kernel with 2 login windows.
In window 1 do a "tail -f /tmp/world.out"
In window 2 do a "tail -f /tmp/world.out"
In window 2 do "^C" to break out of tail -f
In window 1 do "^C" to break out of tail -f
The box panic immediately.
I can't get a coredump at the moment because the kernel just stops while
doing the "syncing disks... 7 7"...
Maybe it is related to kern/25309?
Fatal trap 12: page fault while in kernel mode
cpuid = 1; lapic.id = 00000000
fault virtual address = 0x0
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc023175a
stack pointer = 0x10:0xc8fe5db4
frame pointer = 0x10:0xc8fe5dc0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 347 (tail)
trap number = 12
panic: page fault
cpuid = 1; lapic.id = 00000000
boot() called on cpu#1
syncing disks... 7 7
c02312e8 t ufs_advlock
c0231310 T ufs_vinit
c02313bc t ufs_makeinode
c023159c t ufs_missingop
c02315b4 t ufs_kqfilter
c02316d4 t filt_ufsdetach
c02317dc t filt_ufsread
c0231808 t filt_ufsvnode
c023182c T ufs_vnoperate
John
--
John Hay -- John.Hay@icomtek.csir.co.za
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