Date: Thu, 05 Mar 2009 12:00:22 +0000 From: Matthew West <freebsd@r.zeeb.org> To: FreeBSD-gnats-submit@FreeBSD.org Cc: bzeeb+freebsd+lor@zabbadoz.net Subject: kern/132331: LOR ufs and syncer Message-ID: <E1LfCFS-000LJ7-5U@zeeb.org> Resent-Message-ID: <200903051210.n25CA2D7070261@freefall.freebsd.org>
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>Number: 132331 >Category: kern >Synopsis: LOR ufs and syncer >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Mar 05 12:10:01 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Matthew West >Release: FreeBSD 6.2-RELEASE-p4 amd64 >Organization: >Environment: System: FreeBSD foo.internal 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Fri Feb 27 12:43:45 GMT 2009 mwest@foo.internal:/usr/obj/usr/src/sys/DEBUGLOCK amd64 >Description: lock order reversal: 1st 0xffffff0145356a58 ufs (ufs) @ /usr/src/sys/kern/vfs_mount.c:1202 2nd 0xffffff01824d37e8 syncer (syncer) @ /usr/src/sys/kern/vfs_subr.c:2197 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 __lockmgr_args() at __lockmgr_args+0xc91 vop_stdlock() at vop_stdlock+0x39 VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b _vn_lock() at _vn_lock+0x57 vrele() at vrele+0x151 dounmount() at dounmount+0x2ac unmount() at unmount+0x24b syscall() at syscall+0x1e7 Xfast_syscall() at Xfast_syscall+0xab --- syscall (22, FreeBSD ELF64, unmount), rip = 0x8007c22cc, rsp = 0x7fffffffe8e8, rbp = 0 --- >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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