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Date:      Thu, 9 Jan 2003 19:52:00 +0000
From:      Bruce Cran <bruce@cran.org.uk>
To:        current@freebsd.org
Subject:   LOR in vfs_mount.c and panic during sysinstall
Message-ID:  <20030109195200.GA748@fourtytwo>

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I tried installing today's snapshot, 5.0-CURRENT-20030109-JPSNAP.iso from
snapshots.jp.freebsd.org.   I went away and came back to the following
panic, which happened while sysinstall was copying files:

kernel: trap 12, code=0
stopped at vfs_setdirty+0x59: movzwl 0x6e(%ebx),%eax

the trace returned the following functions:

vfs_setdirty
vfs_busy_pages
bwrite
bawrite
ffs_bupdate
ffs_sync
sync_fsync
sched_sync
fork_exit
fork_trampoline()

trap 0x1, eip=0, esp=0xd69b2d7c, ebp=0


I tried again, and, after getting to the same place:

lock order reversal
1st 0xc44a3ce0 process lock (process lock) @
/usr/src/sys/kern/vfs_mount.c: 1144

2nd: 0xc476ec34 filedesc structure (filedesc structure) @
/usr/src/sys/kern/vfs_mount.c: 1151

I don't know if this is a known problem, and I do know my motherboard
can be a bit buggy.

My computer's an Athlon XP on a A7V-266E motherboard.   I was trying to
install FreeBSD on /dev/ad0s3.   Is this the bug as reported in the TODO
list on the web site?

--
Bruce Cran

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