Date: Mon, 19 Aug 2013 13:57:13 -0500 (CDT) From: Dan Mack <mack@macktronics.com> To: Yuri <yuri@rawbw.com> Cc: current@freebsd.org Subject: Re: Witness message about lock order reversal on 10 (head) Message-ID: <alpine.BSF.2.00.1308191355460.16527@olive.macktronics.com> In-Reply-To: <52124E8C.5020603@rawbw.com> References: <52124E8C.5020603@rawbw.com>
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It might be the same false positive I saw a couple weeks ago ... Davide said to me: | The LOR is a false positive. | See the comment in sys/ufs/ufs/ufs_dirhash.c | Also, switching motherboards is not related to this in any way. You'll | eventually hit that LOR report, unless you disabled WITNESS. Thanks, -- Davide On Mon, 19 Aug 2013, Yuri wrote: > I got these messages on 10 head, rev.254235, during 'filesystem full' > condition. > > Yuri > > > ===== log ===== > lock order reversal: > 1st 0xffffff80f7432470 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:3054 > 2nd 0xfffffe00075b5600 dirhash (dirhash) @ > /usr/src/sys/ufs/ufs/ufs_dirhash.c:284 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > 0xffffff8000284440 > kdb_backtrace() at kdb_backtrace+0x39/frame 0xffffff80002844f0 > witness_checkorder() at witness_checkorder+0xd4f/frame 0xffffff8000284580 > _sx_xlock() at _sx_xlock+0x75/frame 0xffffff80002845c0 > ufsdirhash_add() at ufsdirhash_add+0x3b/frame 0xffffff8000284600 > ufs_direnter() at ufs_direnter+0x688/frame 0xffffff80002846c0 > ufs_mkdir() at ufs_mkdir+0x863/frame 0xffffff80002848c0 > VOP_MKDIR_APV() at VOP_MKDIR_APV+0xf0/frame 0xffffff80002848f0 > kern_mkdirat() at kern_mkdirat+0x21a/frame 0xffffff8000284ae0 > amd64_syscall() at amd64_syscall+0x265/frame 0xffffff8000284bf0 > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xffffff8000284bf0 > --- syscall (136, FreeBSD ELF64, sys_mkdir), rip = 0x800931e9a, rsp = > 0x7fffffffd798, rbp = 0x7fffffffdc70 --- > lock order reversal: > 1st 0xfffffe0007633840 filedesc structure (filedesc structure) @ > /usr/src/sys/kern/kern_descrip.c:1184 > 2nd 0xfffffe0007a45240 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:4346 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > 0xffffff800031f6b0 > kdb_backtrace() at kdb_backtrace+0x39/frame 0xffffff800031f760 > witness_checkorder() at witness_checkorder+0xd4f/frame 0xffffff800031f7f0 > __lockmgr_args() at __lockmgr_args+0x6f2/frame 0xffffff800031f920 > ffs_lock() at ffs_lock+0x84/frame 0xffffff800031f970 > VOP_LOCK1_APV() at VOP_LOCK1_APV+0xf5/frame 0xffffff800031f9a0 > _vn_lock() at _vn_lock+0xab/frame 0xffffff800031fa10 > knlist_remove_kq() at knlist_remove_kq+0x82/frame 0xffffff800031fa40 > knote_fdclose() at knote_fdclose+0xc8/frame 0xffffff800031fa90 > closefp() at closefp+0x64/frame 0xffffff800031fae0 > amd64_syscall() at amd64_syscall+0x265/frame 0xffffff800031fbf0 > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xffffff800031fbf0 > --- syscall (6, FreeBSD ELF64, sys_close), rip = 0x80164537a, rsp = > 0x7fffff7fbf08, rbp = 0x7fffff7fbf20 --- > pid 983 (sendmail), uid 25 inumber 473785 on /: filesystem full > pid 1101 (dd), uid 2 inumber 426338 on /: filesystem full > lock order reversal: > 1st 0xfffffe0007cbc240 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2099 > 2nd 0xffffff80f7894338 bufwait (bufwait) @ > /usr/src/sys/ufs/ffs/ffs_vnops.c:262 > 3rd 0xfffffe003b531418 ufs (ufs) @ /usr/src/sys/kern/vfs_subr.c:2099 > KDB: stack backtrace: > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > 0xffffff8000378e60 > kdb_backtrace() at kdb_backtrace+0x39/frame 0xffffff8000378f10 > witness_checkorder() at witness_checkorder+0xd4f/frame 0xffffff8000378fa0 > __lockmgr_args() at __lockmgr_args+0x6f2/frame 0xffffff80003790d0 > ffs_lock() at ffs_lock+0x84/frame 0xffffff8000379120 > VOP_LOCK1_APV() at VOP_LOCK1_APV+0xf5/frame 0xffffff8000379150 > _vn_lock() at _vn_lock+0xab/frame 0xffffff80003791c0 > vget() at vget+0x70/frame 0xffffff8000379210 > vfs_hash_get() at vfs_hash_get+0xf5/frame 0xffffff8000379260 > ffs_vgetf() at ffs_vgetf+0x41/frame 0xffffff80003792f0 > softdep_sync_buf() at softdep_sync_buf+0x2e4/frame 0xffffff80003793a0 > ffs_syncvnode() at ffs_syncvnode+0x258/frame 0xffffff8000379420 > ffs_truncate() at ffs_truncate+0x5ca/frame 0xffffff8000379600 > ufs_direnter() at ufs_direnter+0x891/frame 0xffffff80003796c0 > ufs_mkdir() at ufs_mkdir+0x863/frame 0xffffff80003798c0 > VOP_MKDIR_APV() at VOP_MKDIR_APV+0xf0/frame 0xffffff80003798f0 > kern_mkdirat() at kern_mkdirat+0x21a/frame 0xffffff8000379ae0 > amd64_syscall() at amd64_syscall+0x265/frame 0xffffff8000379bf0 > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xffffff8000379bf0 > --- syscall (136, FreeBSD ELF64, sys_mkdir), rip = 0x800931e9a, rsp = > 0x7fffffffd898, rbp = 0x7fffffffd970 --- > > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" > dan -- Dan Mack
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