Date: Tue, 01 Feb 2011 10:54:15 +0100 From: Robert Schulze <rs@bytecamp.net> To: freebsd-fs@freebsd.org Subject: LOR in dirhash Message-ID: <4D47D847.8080308@bytecamp.net>
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We are currently having continuous problems with 8-STABLE. Since we upgraded, we have "double faults" every three days or so, yesterday we built a debugging kernel to identify the problem. Today I saw a LOR in /var/log/messages, the whole output: 8<---------------------------------------------------------- lock order reversal: 1st 0xffffff81ef08ce98 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2636 2nd 0xffffff00157b4600 dirhash (dirhash) @ /usr/src/sys/ufs/ufs/ufs_dirhash.c:285 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a kdb_backtrace() at kdb_backtrace+0x37 _witness_debugger() at _witness_debugger+0x49 witness_checkorder() at witness_checkorder+0x7d3 _sx_xlock() at _sx_xlock+0x4a ufsdirhash_acquire() at ufsdirhash_acquire+0x3a ufsdirhash_add() at ufsdirhash_add+0x19 ufs_diren ter() at ufs_direnter+0x876 ufs_makeinode() at ufs_makeinode+0x239 VOP_CREATE_APV() at VOP_CREATE_APV+0xb6 vn_open_cred() at vn_open_cred+0x415 kern_openat() at kern_openat+0x165 syscallenter() at syscallenter+0xe5 syscall() at syscall+0x55 Xfast_syscall() at Xfast_syscall+0xe2 --- syscall (5, FreeBSD ELF64 , open) , rip = 0x8009 a4a7c, rsp = 0x 7ffffff e918, r bp = 0x1 --- 8<---------------------------------------------------------- maybe this is a seriuos one? with kind regards, Robert Schulze
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