Date: Sat, 3 May 2008 01:38:58 +0200 From: Henrik Brix Andersen <brix@FreeBSD.org> To: freebsd-current@freebsd.org Subject: sleepable after non-sleepable LORs Message-ID: <20080502233857.GA24200@tirith.brixandersen.dk>
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--huq684BweRXVnRxX Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, I'm seeing a few LORs in -CURRENT from today when VFS attempts to mount the root filesystem. Full dmesg is available at http://people.freebsd.org/~brix/lor-1.txt - LORs included below: May 2 14:07:41 lothlorien kernel: lock order reversal: (sleepable after no= n-sleepable) May 2 14:07:41 lothlorien kernel: 1st 0xc3e4d020 struct mount mtx (struct = mount mtx) @ /usr/src/sys/kern/vfs_subr.c:338 May 2 14:07:41 lothlorien kernel: 2nd 0xc3e4d000 vfslock (vfslock) @ /usr/= src/sys/kern/vfs_subr.c:365 May 2 14:07:41 lothlorien kernel: KDB: stack backtrace: May 2 14:07:41 lothlorien kernel: db_trace_self_wrapper(c0873465,e23c8b80,= c065781a,c0875b35,c3e4d000,...) at db_trace_self_wrapper+0x26 May 2 14:07:41 lothlorien kernel: kdb_backtrace(c0875b35,c3e4d000,c087ba23= ,c087ba23,c087bfbb,...) at kdb_backtrace+0x29 May 2 14:07:41 lothlorien kernel: witness_checkorder(c3e4d000,1,c087bfbb,1= 6d,e23c8be0,...) at witness_checkorder+0x6b0 May 2 14:07:41 lothlorien kernel: __lockmgr_args(c3e4d000,200100,c3e4d020,= 0,0,...) at __lockmgr_args+0x212 May 2 14:07:41 lothlorien kernel: vfs_busy(c3e4d000,200,0,c39f3000,1,...) = at vfs_busy+0x1b4 May 2 14:07:41 lothlorien kernel: vfs_mount_alloc(0,c08be660,c087bd61,c39f= 3000,c0691d03,...) at vfs_mount_alloc+0x78 May 2 14:07:41 lothlorien kernel: vfs_mountroot(c09108f0,4,c086b0af,264,43= 9e3000,...) at vfs_mountroot+0x253 May 2 14:07:41 lothlorien kernel: start_init(0,e23c8d38,c086ca11,30d,c39f0= 000,...) at start_init+0x65 May 2 14:07:41 lothlorien kernel: fork_exit(c05e854d,0,e23c8d38) at fork_e= xit+0xb8 May 2 14:07:41 lothlorien kernel: fork_trampoline() at fork_trampoline+0x8 May 2 14:07:41 lothlorien kernel: --- trap 0, eip =3D 0, esp =3D 0xe23c8d7= 0, ebp =3D 0 --- May 2 14:07:41 lothlorien kernel: lock order reversal: (sleepable after no= n-sleepable) May 2 14:07:41 lothlorien kernel: 1st 0xc3e542a8 vnode interlock (vnode in= terlock) @ /usr/src/sys/fs/devfs/devfs_vnops.c:197 May 2 14:07:41 lothlorien kernel: 2nd 0xc3e54288 devfs (devfs) @ /usr/src/= sys/kern/vfs_subr.c:2046 May 2 14:07:41 lothlorien kernel: KDB: stack backtrace: May 2 14:07:41 lothlorien kernel: db_trace_self_wrapper(c0873465,e23c8ab0,= c065781a,c0875b35,c3e54288,...) at db_trace_self_wrapper+0x26 May 2 14:07:41 lothlorien kernel: kdb_backtrace(c0875b35,c3e54288,c08661a4= ,c08661a4,c087bfbb,...) at kdb_backtrace+0x29 May 2 14:07:41 lothlorien kernel: witness_checkorder(c3e54288,9,c087bfbb,7= fe,c08906ae,...) at witness_checkorder+0x6b0 May 2 14:07:41 lothlorien kernel: __lockmgr_args(c3e54288,80100,c3e542a8,0= ,0,0,c087bfbb,7fe) at __lockmgr_args+0x738 May 2 14:07:41 lothlorien kernel: vop_stdlock(e23c8b94,c0866381,c084d4d7,8= 0100,c3e54230,...) at vop_stdlock+0x5c May 2 14:07:41 lothlorien kernel: VOP_LOCK1_APV(c08be6e0,e23c8b94,c08f4a00= ,c3e54230,80100,...) at VOP_LOCK1_APV+0xab May 2 14:07:41 lothlorien kernel: _vn_lock(c3e54230,80100,c087bfbb,7fe,c08= 66381,...) at _vn_lock+0x5e May 2 14:07:41 lothlorien kernel: vget(c3e54230,80100,c39f3000,c6,c3e51254= ,...) at vget+0x9c May 2 14:07:41 lothlorien kernel: devfs_allocv(c3e53180,c3e4d000,e23c8c24,= c39f3000,c39f30a4,...) at devfs_allocv+0x117 May 2 14:07:41 lothlorien kernel: devfs_root(c3e4d000,80000,c09631f8,c39f3= 000,4,...) at devfs_root+0x51 May 2 14:07:41 lothlorien kernel: set_rootvnode(c09631e0,0,c087b920,5f6,c0= 691d03,...) at set_rootvnode+0x2d May 2 14:07:41 lothlorien kernel: vfs_mountroot(c09108f0,4,c086b0af,264,43= 9e3000,...) at vfs_mountroot+0x331 May 2 14:07:41 lothlorien kernel: start_init(0,e23c8d38,c086ca11,30d,c39f0= 000,...) at start_init+0x65 May 2 14:07:41 lothlorien kernel: fork_exit(c05e854d,0,e23c8d38) at fork_e= xit+0xb8 May 2 14:07:41 lothlorien kernel: fork_trampoline() at fork_trampoline+0x8 May 2 14:07:41 lothlorien kernel: --- trap 0, eip =3D 0, esp =3D 0xe23c8d7= 0, ebp =3D 0 --- May 2 14:07:41 lothlorien kernel: lock order reversal: May 2 14:07:41 lothlorien kernel: 1st 0xc3e54288 devfs (devfs) @ /usr/src/= sys/kern/vfs_subr.c:2046 May 2 14:07:41 lothlorien kernel: 2nd 0xc3e51254 devfsmount (devfsmount) @= /usr/src/sys/fs/devfs/devfs_vnops.c:201 May 2 14:07:41 lothlorien kernel: KDB: stack backtrace: May 2 14:07:41 lothlorien kernel: db_trace_self_wrapper(c0873465,e23c8bb8,= c065781a,c0875b35,c3e51254,...) at db_trace_self_wrapper+0x26 May 2 14:07:41 lothlorien kernel: kdb_backtrace(c0875b35,c3e51254,c0866340= ,c0866340,c0866381,...) at kdb_backtrace+0x29 May 2 14:07:41 lothlorien kernel: witness_checkorder(c3e51254,9,c0866381,c= 9,c7,...) at witness_checkorder+0x6b0 May 2 14:07:41 lothlorien kernel: _sx_xlock(c3e51254,0,c0866381,c9,c3e5125= 4,...) at _sx_xlock+0x77 May 2 14:07:41 lothlorien kernel: devfs_allocv(c3e53180,c3e4d000,e23c8c24,= c39f3000,c39f30a4,...) at devfs_allocv+0x13c May 2 14:07:41 lothlorien kernel: devfs_root(c3e4d000,80000,c09631f8,c39f3= 000,4,...) at devfs_root+0x51 May 2 14:07:41 lothlorien kernel: set_rootvnode(c09631e0,0,c087b920,5f6,c0= 691d03,...) at set_rootvnode+0x2d May 2 14:07:41 lothlorien kernel: vfs_mountroot(c09108f0,4,c086b0af,264,43= 9e3000,...) at vfs_mountroot+0x331 May 2 14:07:41 lothlorien kernel: start_init(0,e23c8d38,c086ca11,30d,c39f0= 000,...) at start_init+0x65 May 2 14:07:41 lothlorien kernel: fork_exit(c05e854d,0,e23c8d38) at fork_e= xit+0xb8 May 2 14:07:41 lothlorien kernel: fork_trampoline() at fork_trampoline+0x8 May 2 14:07:41 lothlorien kernel: --- trap 0, eip =3D 0, esp =3D 0xe23c8d7= 0, ebp =3D 0 --- May 2 14:07:41 lothlorien kernel: Trying to mount root from ufs:/dev/ad4s2a May 2 14:07:41 lothlorien kernel: WARNING: / was not properly dismounted May 2 14:07:41 lothlorien kernel: lock order reversal: (sleepable after no= n-sleepable) May 2 14:07:41 lothlorien kernel: 1st 0xc3d83ee8 bufobj interlock (bufobj = interlock) @ /usr/src/sys/kern/vfs_bio.c:2442 May 2 14:07:41 lothlorien kernel: 2nd 0xd7a56088 bufwait (bufwait) @ /usr/= src/sys/kern/vfs_bio.c:2456 May 2 14:07:41 lothlorien kernel: KDB: stack backtrace: May 2 14:07:41 lothlorien kernel: db_trace_self_wrapper(c0873465,e23c87b0,= c065781a,c0875b35,d7a56088,...) at db_trace_self_wrapper+0x26 May 2 14:07:41 lothlorien kernel: kdb_backtrace(c0875b35,d7a56088,c087a912= ,c087a912,c0879ec1,...) at kdb_backtrace+0x29 May 2 14:07:41 lothlorien kernel: witness_checkorder(d7a56088,9,c0879ec1,9= 98,e23c8810,...) at witness_checkorder+0x6b0 May 2 14:07:41 lothlorien kernel: __lockmgr_args(d7a56088,81900,c3d83ee8,c= 087a86e,50,...) at __lockmgr_args+0x738 May 2 14:07:41 lothlorien kernel: getblk(c3d83e38,0,0,800,0,...) at getblk= +0x144 May 2 14:07:41 lothlorien kernel: breadn(c3d83e38,0,0,800,0,...) at breadn= +0x44 May 2 14:07:41 lothlorien kernel: bread(c3d83e38,0,0,800,0,...) at bread+0= x4c May 2 14:07:41 lothlorien kernel: ffs_blkatoff(c3d83e38,0,0,0,e23c89b0,...= ) at ffs_blkatoff+0xc6 May 2 14:07:41 lothlorien kernel: ufs_lookup(e23c89f0,c3d83e38,e23c8b54,c3= d83e38,e23c8a10,...) at ufs_lookup+0x2be May 2 14:07:41 lothlorien kernel: VOP_CACHEDLOOKUP_APV(c08ddfe0,e23c89f0,e= 23c8b54,e23c8b40,c08f46a0,...) at VOP_CACHEDLOOKUP_APV+0xa0 May 2 14:07:41 lothlorien kernel: vfs_cache_lookup(e23c8a70,e23c8a70,0,c3d= 83e38,80000,...) at vfs_cache_lookup+0xc3 May 2 14:07:41 lothlorien kernel: VOP_LOOKUP_APV(c08ddfe0,e23c8a70,c087b6c= e,1b0,e23c8b40,...) at VOP_LOOKUP_APV+0xaa May 2 14:07:41 lothlorien kernel: lookup(e23c8b28,c087b6ce,d8,c0,c39c372c,= =2E..) at lookup+0x50a May 2 14:07:41 lothlorien kernel: namei(e23c8b28,e23c8b2c,c0657038,c06116d= d,c0962a50,...) at namei+0x3d3 May 2 14:07:41 lothlorien kernel: kern_unlinkat(c39f3000,ffffff9c,c087bd5d= ,1,e23c8c60,...) at kern_unlinkat+0x3f May 2 14:07:41 lothlorien kernel: kern_unlink(c39f3000,c087bd5d,1,631,0,..= =2E) at kern_unlink+0x27 May 2 14:07:41 lothlorien kernel: vfs_mountroot_try(c087bf17,c084d4d9,c086= 3f29,1,c0691d03,...) at vfs_mountroot_try+0x46b May 2 14:07:41 lothlorien kernel: vfs_mountroot(c09108f0,4,c086b0af,264,43= 9e3000,...) at vfs_mountroot+0x3f1 May 2 14:07:41 lothlorien kernel: start_init(0,e23c8d38,c086ca11,30d,c39f0= 000,...) at start_init+0x65 May 2 14:07:41 lothlorien kernel: fork_exit(c05e854d,0,e23c8d38) at fork_e= xit+0xb8 May 2 14:07:41 lothlorien kernel: fork_trampoline() at fork_trampoline+0x8 May 2 14:07:41 lothlorien kernel: --- trap 0, eip =3D 0, esp =3D 0xe23c8d7= 0, ebp =3D 0 --- --=20 Henrik Brix Andersen <brix@FreeBSD.org> --huq684BweRXVnRxX Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (FreeBSD) Comment: GnuPG signed iEYEARECAAYFAkgbphEACgkQv+Q4flTiePjG/ACfXbbDdIcqV8gcI5Ux+Dx3FJ5i MJIAnjhRngrpK68XlRicOui+eYDzpqbe =xeht -----END PGP SIGNATURE----- --huq684BweRXVnRxX--
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