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Date:      Mon, 12 Oct 2015 22:29:26 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 192923] Lock order reversal in vfs_bio.c bufwait
Message-ID:  <bug-192923-8-QN3cHfUBDS@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-192923-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-192923-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=192923

--- Comment #2 from daryl@ci.com.au ---
I am also getting this problem on each reboot.
FreeBSD 11.0-CURRENT #1 r289163
------
Trying to mount root from ufs:/dev/gpt/ssdroot [rw]...
lock order reversal:
 1st 0xfffff8001a89c068 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2231
 2nd 0xfffffe07c6843280 bufwait (bufwait) @
/usr/src/sys/ufs/ffs/ffs_vnops.c:263
 3rd 0xfffff80018f1fb78 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2231
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe085e0b8d40
witness_checkorder() at witness_checkorder+0xe79/frame 0xfffffe085e0b8dc0
__lockmgr_args() at __lockmgr_args+0xd3b/frame 0xfffffe085e0b8e70
ffs_lock() at ffs_lock+0xa6/frame 0xfffffe085e0b8ec0
VOP_LOCK1_APV() at VOP_LOCK1_APV+0x100/frame 0xfffffe085e0b8ef0
_vn_lock() at _vn_lock+0x9a/frame 0xfffffe085e0b8f60
vget() at vget+0x63/frame 0xfffffe085e0b8fb0
vfs_hash_get() at vfs_hash_get+0xcc/frame 0xfffffe085e0b9000
ffs_vgetf() at ffs_vgetf+0x40/frame 0xfffffe085e0b9090
softdep_sync_buf() at softdep_sync_buf+0xad1/frame 0xfffffe085e0b9170
ffs_syncvnode() at ffs_syncvnode+0x256/frame 0xfffffe085e0b91f0
ffs_truncate() at ffs_truncate+0x6cd/frame 0xfffffe085e0b93e0
ufs_direnter() at ufs_direnter+0x7bb/frame 0xfffffe085e0b94b0
ufs_makeinode() at ufs_makeinode+0x5f3/frame 0xfffffe085e0b9670
ufs_create() at ufs_create+0x2d/frame 0xfffffe085e0b9690
VOP_CREATE_APV() at VOP_CREATE_APV+0xf1/frame 0xfffffe085e0b96c0
vn_open_cred() at vn_open_cred+0x2f8/frame 0xfffffe085e0b9830
kern_openat() at kern_openat+0x25c/frame 0xfffffe085e0b99a0
amd64_syscall() at amd64_syscall+0x2de/frame 0xfffffe085e0b9ab0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe085e0b9ab0
--- syscall (499, FreeBSD ELF64, sys_openat), rip = 0x800b5cb0a, rsp =
0x7fffffffd538, rbp = 0x7fffffffd620 ---

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