Date: Wed, 19 Nov 2003 09:15:06 +0100 (CET) From: dirk.meyer@dinoex.sub.org To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/59455: lock order reversal Message-ID: <200311190815.hAJ8F6Dx019025@home.dinoex.sub.de> Resent-Message-ID: <200311190820.hAJ8KNh3084269@freefall.freebsd.org>
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>Number: 59455 >Category: kern >Synopsis: lock order reversal >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Nov 19 00:20:19 PST 2003 >Closed-Date: >Last-Modified: >Originator: Dirk Meyer >Release: FreeBSD 5.1-CURRENT i386 >Organization: privat >Environment: FreeBSD current.dinoex.sub.de 5.1-CURRENT FreeBSD 5.1-CURRENT #4: Tue Nov 11 22:06:00 CET 2003 root@current.dinoex.sub.de:/usr/obj/usr/src/sys/NET5 i386 >Description: Nov 19 05:51:18 current kernel: Sleeping on "stopevent" with the following non-sleepable locks held: Nov 19 05:51:18 current kernel: exclusive sleep mutex sigacts r = 0 (0xc4e34aa8) locked @ /usr/src/sys/kern/kern_synch.c:293 Nov 19 05:51:18 current kernel: lock order reversal Nov 19 05:51:18 current kernel: 1st 0xc4e34aa8 sigacts (sigacts) @ /usr/src/sys/kern/kern_synch.c:293 Nov 19 05:51:18 current kernel: 2nd 0xc49337fc process lock (process lock) @ /usr/src/sys/kern/kern_synch.c:309 Nov 19 05:51:18 current kernel: Stack backtrace: Nov 19 05:51:18 current kernel: Sleeping on "stopevent" with the following non-sleepable locks held: Nov 19 05:51:18 current kernel: exclusive sleep mutex sigacts r = 0 (0xc4e34aa8) locked @ /usr/src/sys/kern/subr_trap.c:260 Nov 19 05:51:18 current kernel: Sleeping on "stopevent" with the following non-sleepable locks held: Nov 19 05:51:18 current kernel: exclusive sleep mutex sigacts r = 0 (0xc4e34aa8) locked @ /usr/src/sys/kern/subr_trap.c:260 >How-To-Repeat: a client was mounting nfs from thsi machine. I can't reproduce it. >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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