Date: Mon, 20 Jul 2009 21:20:43 GMT From: Rene Ladan <rene@FreeBSD.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/136944: [lor] bufwait/snaplk (fsync) Message-ID: <200907202120.n6KLKhG2086256@www.freebsd.org> Resent-Message-ID: <200907202130.n6KLU52a085402@freefall.freebsd.org>
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>Number: 136944 >Category: kern >Synopsis: [lor] bufwait/snaplk (fsync) >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: Mon Jul 20 21:30:05 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Rene Ladan >Release: 8.0-BETA2 amd64 >Organization: >Environment: FreeBSD self.rene-ladan.nl 8.0-BETA2 FreeBSD 8.0-BETA2 #0: Wed Jul 15 21:48:41 UTC 2009 root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 >Description: lock order reversal: 1st 0xffffff8029490410 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:2558 2nd 0xffffff0078f4a130 snaplk (snaplk) @ /usr/src/sys/ufs/ffs/ffs_snapshot.c:2223 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+0xcf3 ffs_copyonwrite() at ffs_copyonwrite+0x189 ffs_geom_strategy() at ffs_geom_strategy+0x1b5 bufwrite() at bufwrite+0x106 ffs_update() at ffs_update+0x1bd ffs_fsync() at ffs_fsync+0x43 fsync() at fsync+0x148 syscall() at syscall+0x1af Xfast_syscall() at Xfast_syscall+0xe1 --- syscall (95, FreeBSD ELF64, fsync), rip = 0x80084cd0c, rsp = 0x7fffffffdcb8, rbp = 0x1 --- >How-To-Repeat: GENERIC kernel, only devfs and UFS2 filesystems mounted via /dev/ad* (/ , /var, /tmp, /usr) >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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