Date: Thu, 21 Jul 2016 15:28:50 -0700 From: Maxim Sobolev <sobomax@freebsd.org> To: Konstantin Belousov <kib@freebsd.org>, FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Two fresh LORs from the latest 11-stable Message-ID: <CAH7qZfsu%2B6X%2B2ys56OCTsm9Om17Yo%2B1ard_2Ut%2B4V3-1%2BCpqJg@mail.gmail.com>
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Seen those on our build box right after pulling latest update. lock order reversal: 1st 0xfffffe00f62564c0 bufwait (bufwait) @ /usr/home/sobomax/freebsd11.git/sys/kern/vfs_bio.c:3512 2nd 0xfffff80003d33800 dirhash (dirhash) @ /usr/home/sobomax/freebsd11.git/sys/ufs/ufs/ufs_dirhash.c:281 stack backtrace: #0 0xffffffff80ab5fc0 at witness_debugger+0x70 #1 0xffffffff80ab5eb4 at witness_checkorder+0xe54 #2 0xffffffff80a5f1d2 at _sx_xlock+0x72 #3 0xffffffff80d1d8dd at ufsdirhash_add+0x3d #4 0xffffffff80d206aa at ufs_direnter+0x4da #5 0xffffffff80d28d09 at ufs_mkdir+0x8a9 #6 0xffffffff810235e0 at VOP_MKDIR_APV+0xe0 #7 0xffffffff80b23ef8 at kern_mkdirat+0x208 #8 0xffffffff80ec7b2b at amd64_syscall+0x2db #9 0xffffffff80ea767b at Xfast_syscall+0xfb lock order reversal: 1st 0xfffff80064d86d50 ufs (ufs) @ /usr/home/sobomax/freebsd11.git/sys/kern/vfs_subr.c:2523 2nd 0xfffffe00f669fe00 bufwait (bufwait) @ /usr/home/sobomax/freebsd11.git/sys/ufs/ffs/ffs_vnops.c:263 3rd 0xfffff800a5c4eb78 ufs (ufs) @ /usr/home/sobomax/freebsd11.git/sys/kern/vfs_subr.c:2523 stack backtrace: #0 0xffffffff80ab5fc0 at witness_debugger+0x70 #1 0xffffffff80ab5eb4 at witness_checkorder+0xe54 #2 0xffffffff80a2f052 at __lockmgr_args+0x4c2 #3 0xffffffff80d18546 at ffs_lock+0xa6 #4 0xffffffff81023fd0 at VOP_LOCK1_APV+0xe0 #5 0xffffffff80b26aaa at _vn_lock+0x9a #6 0xffffffff80b16ed4 at vget+0x64 #7 0xffffffff80b095cc at vfs_hash_get+0xcc #8 0xffffffff80d14250 at ffs_vgetf+0x40 #9 0xffffffff80d0b4a6 at softdep_sync_buf+0x496 #10 0xffffffff80d19136 at ffs_syncvnode+0x256 #11 0xffffffff80cefed3 at ffs_truncate+0x8d3 #12 0xffffffff80d20851 at ufs_direnter+0x681 #13 0xffffffff80d28d09 at ufs_mkdir+0x8a9 #14 0xffffffff810235e0 at VOP_MKDIR_APV+0xe0 #15 0xffffffff80b23ef8 at kern_mkdirat+0x208 #16 0xffffffff80ec7b2b at amd64_syscall+0x2db #17 0xffffffff80ea767b at Xfast_syscall+0xfb -Max
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