Date: Sat, 16 Jan 2010 10:14:19 GMT From: Dmitry <dmitry2006@yandex.ru> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/142878: [zfs] [vfs] lock order reversal Message-ID: <201001161014.o0GAEJFZ035088@www.freebsd.org> Resent-Message-ID: <201001161020.o0GAK3jW020684@freefall.freebsd.org>
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>Number: 142878 >Category: kern >Synopsis: [zfs] [vfs] lock order reversal >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Jan 16 10:20:03 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Dmitry >Release: 8.0-STABLE >Organization: >Environment: FreeBSD *** 8.0-STABLE FreeBSD 8.0-STABLE #0: Sat Jan 16 14:27:24 YEKT 2010 root@***:/usr/obj/usr/src/sys/GENERIC_debug amd64 >Description: During boot, after find core dump, i see this message: lock order reversal: 1st 0xffffff002630c578 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1058 2nd 0xffffff0026353578 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2091 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a _witness_debugger() at _witness_debugger+0x49 witness_checkorder() at witness_checkorder+0x7ea __lockmgr_args() at __lockmgr_args+0xcd4 vop_stdlock() at vop_stdlock+0x39 VOP_LOCK1_APV() at VOP_LOCK1_APV+0x9b _vn_lock() at _vn_lock+0x5d vget() at vget+0x6c devfs_allocv() at devfs_allocv+0xee devfs_root() at devfs_root+0x41 vfs_donmount() at vfs_donmount+0xfa8 nmount() at nmount+0x74 syscall() at syscall+0x1cd Xfast_syscall() at Xfast_syscall+0xe1 --- syscall (378, FreeBSD ELF64, nmount), rip = 0x8007d266c, rsp = 0x7fffffffdcb8, rbp = 0x7fffffffe250 --- >How-To-Repeat: make kernel with debug options and boot: options KDB options KDB_TRACE options KDB_UNATTENDED options DDB options INVARIANTS options INVARIANT_SUPPORT options WITNESS options DEBUG_LOCKS options DEBUG_VFS_LOCKS options DIAGNOSTIC >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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