Date: Mon, 25 Jan 2010 07:23:45 +1100 (EST) From: Peter Jeremy <peterjeremy@acm.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/143184: [zfs] [lor] zfs/bufwait LOR Message-ID: <201001242023.o0OKNj5p044592@server.vk2pj.dyndns.org> Resent-Message-ID: <201001242030.o0OKU63c030367@freefall.freebsd.org>
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>Number: 143184 >Category: kern >Synopsis: [zfs] [lor] zfs/bufwait LOR >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: Sun Jan 24 20:30:05 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Peter Jeremy >Release: FreeBSD 8.0-STABLE amd64 >Organization: n/a >Environment: System: FreeBSD server.vk2pj.dyndns.org 8.0-STABLE FreeBSD 8.0-STABLE #11: Mon Nov 30 16:36:34 EST 2009 root@server.vk2pj.dyndns.org:/var/obj/usr/src/sys/server amd64 >Description: New LOR: lock order reversal: 1st 0xffffff002f7fb270 zfs (zfs) @ /usr/src/sys/kern/vfs_vnops.c:533 2nd 0xffffff80803a26e0 bufwait (bufwait) @ /usr/src/sys/vm/vm_pager.c:311 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2a _witness_debugger() at _witness_debugger+0x2c witness_checkorder() at witness_checkorder+0x66f __lockmgr_args() at __lockmgr_args+0x475 initpbuf() at initpbuf+0xb9 getpbuf() at getpbuf+0xdc swap_pager_getpages() at swap_pager_getpages+0x1aa vm_fault() at vm_fault+0x5f7 trap_pfault() at trap_pfault+0x128 trap() at trap+0x379 calltrap() at calltrap+0x8 --- trap 0xc, rip = 0xffffffff8049497b, rsp = 0xffffff809a427830, rbp = 0xffffff809a4278b0 --- copyout() at copyout+0x3b dmu_read_uio() at dmu_read_uio+0x98 zfs_freebsd_read() at zfs_freebsd_read+0x56f VOP_READ_APV() at VOP_READ_APV+0x44 vn_read() at vn_read+0x149 dofileread() at dofileread+0xa1 kern_readv() at kern_readv+0x60 read() at read+0x55 syscall() at syscall+0x1ac Xfast_syscall() at Xfast_syscall+0xe1 --- syscall (3, FreeBSD ELF64, read), rip = 0x8008ce86c, rsp = 0x7ffffffeb718, rbp = 0x805b41d18 --- >How-To-Repeat: Unknown >Fix: Unknown >Release-Note: >Audit-Trail: >Unformatted:
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