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Date:      Tue, 29 Jun 1999 08:01:36 +0200
From:      Peter Holm <peter@holm.cc>
To:        freebsd-current@freebsd.org
Subject:   Re: lockmgr crashes...
Message-ID:  <37786140.ACB199AF@holm.cc>
References:  <199906290548.HAA07683@login.dknet.dk>

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>
> Date: Mon, 28 Jun 1999 17:22:22 -0400 (EDT)
> From: Kenneth Wayne Culver <culverk@wam.umd.edu>
> To: freebsd-current@FreeBSD.ORG
>
>
> Just to let someone know... I recently (a couple of hours ago) have been
> having a problem with kernel panics.... I tried to remake the world and
> the kernel panics saying:
>
> panic: lockmgr:
>
> then what follows is different every time... all I know is that it doesn't
> happen until the process number is in the 25000 range, and after this, the
> disks refuse to sync, and I have to push the reset button on my
> computer...
>
> Kenneth Culver
>

I can reproduce the same error within an hour.

Here's a stack trace :
#0  0xc016597d in boot ()
#1  0xc0165bcd in panic ()
#2  0xc012d561 in db_panic ()
#3  0xc012d501 in db_command ()
#4  0xc012d5c6 in db_command_loop ()
#5  0xc012f727 in db_trap ()
#6  0xc0251300 in kdb_trap ()
#7  0xc025f9e0 in trap ()
#8  0xc0251543 in Debugger ()
#9  0xc0165bc4 in panic ()
#10 0xc0161610 in lockmgr ()
#11 0xc0238c52 in relpbuf ()
#12 0xc022daa4 in swp_pager_async_iodone ()
#13 0xc0186393 in biodone ()
#14 0xc028d227 in wdintr ()
#15 0xc025e7ec in slow_copyout ()
#16 0xc017ef13 in soreceive ()
#17 0xc0174ae4 in soo_read ()
#18 0xc01717b3 in dofileread ()
#19 0xc01716c3 in read ()
#20 0xc026021e in syscall ()
#21 0xc0251c30 in Xint0x80_syscall ()
#22 0x8048a2f in ?? ()
#23 0x804868d in ?? ()

I compiled with DEBUG_LOG, but the struct lock argument to #10 contains
sys/buf.h:261,
which is just BUF_LOCK.

By the way, can anybody point me to documentation for ddb?

Regards,
--
Peter Holm | mailto:peter@holm.cc | http://login.dknet.dk/~pho/
  -[ Member of the BSD-Dk User Group / http://www.bsd-dk.dk/ ] -




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