Date: Sun, 14 Jul 2013 16:33:53 +0200 From: Patrick Lamaiziere <patfbsd@davenulle.org> To: freebsd-stable@freebsd.org Subject: Re: (9.2) panic under disk load (gam_server / knlist_remove_kq) Message-ID: <20130714163353.2367a6a4@davenulle.org> In-Reply-To: <20130714115953.1afd6e90@davenulle.org> References: <20130714115953.1afd6e90@davenulle.org>
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Le Sun, 14 Jul 2013 11:59:53 +0200, Patrick Lamaiziere <patfbsd@davenulle.org> a écrit : Hello, > 9.2 PRERELEASE (today) / amd64 > > Hello, > > I'm seeing a panic while trying to build a poudriere repository. > > As far I can see it always happens when gam_server is started (ie > xfce is running) and under disk load (poudriere bulk build) : > (That is something new, the box was pretty stable) > > the complete crash dump (core.0.txt) is here: > http://user.lamaiziere.net/patrick/panic_gam_server.txt With WITNESS and ASSERTION on, I see a warning that looks related : Jul 14 16:23:29 roxette kernel: WARNING: destroying knlist w/ knotes on it! and the box panics just after this. Also there are too LOR just before the panic, I don't know it there are related or not : Jul 14 16:23:29 roxette kernel: lock order reversal: Jul 14 16:23:29 roxette kernel: 1st 0xfffffe0013335878 zfs (zfs) @ /usr/src/sys/kern/vfs_mount.c:1240 Jul 14 16:23:29 roxette kernel: 2nd 0xfffffe00495a5488 syncer (syncer) @ /usr/src/sys/kern/vfs_subr.c:2335 Jul 14 16:23:29 roxette kernel: KDB: stack backtrace: Jul 14 16:23:29 roxette kernel: #0 0xffffffff8094bc36 at kdb_backtrace+0x66 Jul 14 16:23:29 roxette kernel: #1 0xffffffff809603be at _witness_debugger+0x2e Jul 14 16:23:29 roxette kernel: #2 0xffffffff80961a95 at witness_checkorder+0x865 Jul 14 16:23:29 roxette kernel: #3 0xffffffff808f8e21 at __lockmgr_args+0x1161 Jul 14 16:23:29 roxette kernel: #4 0xffffffff8099f739 at vop_stdlock+0x39 Jul 14 16:23:29 roxette kernel: #5 0xffffffff80d93593 at VOP_LOCK1_APV+0xe3 Jul 14 16:23:29 roxette kernel: #6 0xffffffff809c0727 at _vn_lock+0x47 Jul 14 16:23:29 roxette kernel: #7 0xffffffff809b42d8 at vputx+0x328 Jul 14 16:23:29 roxette kernel: #8 0xffffffff809a88d4 at dounmount+0x294 Jul 14 16:23:29 roxette kernel: #9 0xffffffff809a914e at sys_unmount+0x3ce Jul 14 16:23:29 roxette kernel: #10 0xffffffff80cec439 at amd64_syscall+0x2f9 Jul 14 16:23:29 roxette kernel: #11 0xffffffff80cd6d57 at Xfast_syscall+0xf7 Jul 14 16:23:29 roxette kernel: lock order reversal: Jul 14 16:23:29 roxette kernel: 1st 0xfffffe006e1eac68 ufs (ufs) @ /usr/src/sys/modules/nullfs/../../fs/nullfs/null_vnops.c:620 Jul 14 16:23:29 roxette kernel: 2nd 0xffffffff813ebda0 allproc (allproc) @ /usr/src/sys/kern/kern_descrip.c:2822 Jul 14 16:23:29 roxette kernel: KDB: stack backtrace: Jul 14 16:23:29 roxette kernel: #0 0xffffffff8094bc36 at kdb_backtrace+0x66 Jul 14 16:23:29 roxette kernel: #1 0xffffffff809603be at _witness_debugger+0x2e Jul 14 16:23:29 roxette kernel: #2 0xffffffff80961a95 at witness_checkorder+0x865 Jul 14 16:23:29 roxette kernel: #3 0xffffffff8091b1fa at _sx_slock+0x5a Jul 14 16:23:29 roxette kernel: #4 0xffffffff808d30ff at mountcheckdirs+0x3f Jul 14 16:23:29 roxette kernel: #5 0xffffffff809a891f at dounmount+0x2df Jul 14 16:23:29 roxette kernel: #6 0xffffffff809a914e at sys_unmount+0x3ce Jul 14 16:23:29 roxette kernel: #7 0xffffffff80cec439 at amd64_syscall+0x2f9 Jul 14 16:23:29 roxette kernel: #8 0xffffffff80cd6d57 at Xfast_syscall+0xf7 Jul 14 16:23:29 roxette kernel: WARNING: destroying knlist w/ knotes on it! Thanks, regards
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