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Date:      Mon, 01 Jun 2009 08:52:04 +0900
From:      Randy Bush <randy@psg.com>
To:        current <current@freebsd.org>
Subject:   lor vfs_bio/ufs_dirhash
Message-ID:  <m2tz30vniz.wl%randy@psg.com>

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FreeBSD xx 8.0-CURRENT FreeBSD 8.0-CURRENT #3: Sun May 31 22:52:41 UTC 2009     root@xx:/usr/obj/usr/src/sys/XXXX  amd64

i think this may be different than 261
<http://sources.zabbadoz.net/freebsd/lor/261.html>;

sorry, this is all i got on serial console

randy

---

lock order reversal:
 1st 0xffffff8052aba050 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2556
 2nd 0xffffff0004f53000 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:275
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x2e
witness_checkorder() at witness_checkorder+0x81e
_sx_xlock() at _sx_xlock+0x55
ufsdirhash_acquire() at ufsdirhash_acquire+0x33
ufsdirhash_add() at ufsdirhash_add+0x19
ufs_direnter() at ufs_direnter+0x88b
ufs_makeinode() at ufs_makeinode+0x31c
VOP_CREATE_APV() at VOP_CREATE_APV+0xb1
vn_open_cred() at vn_open_cred+0x3fd
kern_openat() at kern_openat+0x159
syscall() at syscall+0x1dd
Xfast_syscall() at Xfast_syscall+0xd0
--- syscall (5, FreeBSD ELF64, open), rip = 0x800c0bfcc, rsp = 0x7fffffffe6f8, rbp = 0x7fffffffe860 ---

-30-



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