Date: Fri, 25 May 2007 21:01:07 -0400 From: "Andrew Edwards" <aedwards@sandvine.com> To: <freebsd-fs@freebsd.org>, <freebsd-performance@freebsd.org> Subject: RE: Ufs dead-locks on freebsd 6.2 Message-ID: <5230D3C40B842D4F9FB3CD368021BEF72F09AC@exchange-2.sandvine.com> In-Reply-To: <5230D3C40B842D4F9FB3CD368021BEF72F093F@exchange-2.sandvine.com>
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I guess I feel similar to Gore Jarold with his posting about being frustrated with ufs. I have a serious problem, it's preventing me from upgrading my production systems to freebsd 6+, I can reproduce this problem easily but I can't seem to get anyone to assist me. At the suggestion of one of our internal developers I have enabled memguard to help find the cause of the panic and I'm posting the current backtrace etc. as recommended from the developers handbook on debgging dead-locks. If someone can help me it would be greatly appreciated. db> bt Tracing pid 26543 tid 105117 td 0xd41c6a80 kdb_enter(c0785f13) at kdb_enter+0x2b vfs_badlock(c0785f2c,c0786051,cd3dc414) at vfs_badlock+0x47 assert_vop_locked(cd3dc414,c0786051) at assert_vop_locked+0x4a vop_lock_post(fa048bec,0,1002,cd3dc414,fa048c08,...) at vop_lock_post+0x2a VOP_LOCK_APV(c07dc2e0,fa048bec) at VOP_LOCK_APV+0xa0 vn_lock(cd3dc414,1002,d41c6a80,0,0,...) at vn_lock+0xac vn_statfile(cd3f0870,fa048c74,cd39f280,d41c6a80) at vn_statfile+0x63 kern_fstat(d41c6a80,3,fa048c74) at kern_fstat+0x35 fstat(d41c6a80,fa048d04) at fstat+0x19 syscall(3b,805003b,bfbf003b,8054000,8054000,...) at syscall+0x25b Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (189, FreeBSD ELF32, fstat), eip =3D 0x6814b08f, esp =3D 0xbfbfec2c, ebp =3D 0xbfbfeca8 --- db> show pcpu cpuid =3D 1 curthread =3D 0xd41c6a80: pid 26543 "cron" curpcb =3D 0xfa048d90 fpcurthread =3D none idlethread =3D 0xccb5c600: pid 10 "idle: cpu1" APIC ID =3D 6 currentldt =3D 0x50 spin locks held: db> show allpcpu Current CPU: 1 cpuid =3D 0 curthread =3D 0xcd01ec00: pid 898 "cron" curpcb =3D 0xf5ad7d90 fpcurthread =3D none idlethread =3D 0xccb5c780: pid 11 "idle: cpu0" APIC ID =3D 0 currentldt =3D 0x50 spin locks held: cpuid =3D 1 curthread =3D 0xd41c6a80: pid 26543 "cron" curpcb =3D 0xfa048d90 fpcurthread =3D none idlethread =3D 0xccb5c600: pid 10 "idle: cpu1" APIC ID =3D 6 currentldt =3D 0x50 spin locks held: db> show locks exclusive sx user map r =3D 0 (0xd4135734) locked @ /usr/src/sys/vm/vm_map.c:3074 db> show alllocks Process 26543 (cron) thread 0xd41c6a80 (105117) exclusive sx user map r =3D 0 (0xd4135734) locked @ /usr/src/sys/vm/vm_map.c:3074 db> show lockedvnods Locked vnodes 0xce00cc3c: tag ufs, type VREG usecount 1, writecount 1, refcount 11 mountedhere 0 flags () v_object 0xcdae9b58 ref 0 pages 96 lock type ufs: EXCL (count 1) by thread 0xccffb300 (pid 18081) with 1 pending#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc06015c4 at vn_write+0x138 #5 0xc05c4544 at dofilewrite+0x7c #6 0xc05c43e3 at kern_writev+0x3b #7 0xc05c4309 at write+0x45 #8 0xc0723e2b at syscall+0x25b #9 0xc070ee0f at Xint0x80_syscall+0x1f ino 494730, on dev amrd0s1d 0xccf936cc: tag ufs, type VDIR usecount 1, writecount 0, refcount 2494 mountedhere 0 flags (VV_ROOT) v_object 0xd18598c4 ref 0 pages 0 lock type ufs: EXCL (count 1) by thread 0xcdff7000 (pid 19300) with 2492 pending#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05f5d12 at vget+0xbe #5 0xc05ed9f9 at vfs_hash_get+0x8d #6 0xc06b7b8f at ffs_vget+0x27 #7 0xc06c1435 at ufs_root+0x19 #8 0xc05eef1c at lookup+0x7c8 #9 0xc05ee4b2 at namei+0x39a #10 0xc0600a13 at vn_open_cred+0x5b #11 0xc06009b6 at vn_open+0x1e #12 0xc05fa126 at kern_open+0xb6 #13 0xc05fa03a at open+0x1a #14 0xc0723e2b at syscall+0x25b #15 0xc070ee0f at Xint0x80_syscall+0x1f ino 2, on dev amrd0s1d 0xcd00a000: tag ufs, type VDIR usecount 1, writecount 0, refcount 3 mountedhere 0 flags () v_object 0xce083210 ref 0 pages 0 lock type ufs: EXCL (count 1) by thread 0xcd574d80 (pid 89705) with 1 pending#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05f5d12 at vget+0xbe #5 0xc05ea48e at cache_lookup+0x34a #6 0xc05ea9c2 at vfs_cache_lookup+0x92 #7 0xc0737847 at VOP_LOOKUP_APV+0x87 #8 0xc05eebf8 at lookup+0x4a4 #9 0xc05ee4b2 at namei+0x39a #10 0xc0600a13 at vn_open_cred+0x5b #11 0xc06009b6 at vn_open+0x1e #12 0xc05fa126 at kern_open+0xb6 #13 0xc05fa03a at open+0x1a #14 0xc0723e2b at syscall+0x25b #15 0xc070ee0f at Xint0x80_syscall+0x1f ino 494592, on dev amrd0s1d 0xcd23f15c: tag ufs, type VREG usecount 1, writecount 1, refcount 4 mountedhere 0 flags () v_object 0xcd16ec60 ref 0 pages 12 lock type ufs: EXCL (count 1) by thread 0xccff8300 (pid 713)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc06015c4 at vn_write+0x138 #5 0xc05c4544 at dofilewrite+0x7c #6 0xc05c43e3 at kern_writev+0x3b #7 0xc05c4309 at write+0x45 #8 0xc0723e2b at syscall+0x25b #9 0xc070ee0f at Xint0x80_syscall+0x1f ino 494620, on dev amrd0s1d 0xd02a0984: tag ufs, type VREG usecount 1, writecount 1, refcount 3 mountedhere 0 flags () v_object 0xcd89fad4 ref 0 pages 3 lock type ufs: EXCL (count 1) by thread 0xccffb000 (pid 603)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 188453, on dev amrd0s1d 0xd0b442b8: tag ufs, type VREG usecount 1, writecount 1, refcount 2 mountedhere 0 flags () v_object 0xcffc88c4 ref 0 pages 1 lock type ufs: EXCL (count 1) by thread 0xcd590480 (pid 18304)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 424403, on dev amrd0s1d 0xd24d3c3c: tag ufs, type VREG usecount 1, writecount 1, refcount 2 mountedhere 0 flags () v_object 0xd13b3ce4 ref 0 pages 1 lock type ufs: EXCL (count 1) by thread 0xcd59ec00 (pid 18735)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 424405, on dev amrd0s1d 0xd09d6414: tag ufs, type VREG usecount 1, writecount 1, refcount 3 mountedhere 0 flags () v_object 0xcfd71b58 ref 0 pages 1 lock type ufs: EXCL (count 1) by thread 0xcd6cfc00 (pid 20083)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 424406, on dev amrd0s1d 0xce0762b8: tag ufs, type VREG usecount 1, writecount 1, refcount 3 mountedhere 0 flags () v_object 0xd14fcdec ref 0 pages 1 lock type ufs: EXCL (count 1) by thread 0xcd01e000 (pid 17274)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 424408, on dev amrd0s1d 0xce91f414: tag ufs, type VREG usecount 1, writecount 1, refcount 3 mountedhere 0 flags () v_object 0xd24af9cc ref 0 pages 1 lock type ufs: EXCL (count 1) by thread 0xce03d780 (pid 20575)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 424409, on dev amrd0s1d 0xd1701d98: tag ufs, type VREG usecount 1, writecount 1, refcount 3 mountedhere 0 flags () v_object 0xd0c8d39c ref 0 pages 1 lock type ufs: EXCL (count 1) by thread 0xcd6ce180 (pid 21143)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 424411, on dev amrd0s1d 0xcedf7828: tag ufs, type VREG usecount 1, writecount 1, refcount 3 mountedhere 0 flags () v_object 0xd2c37948 ref 0 pages 1 lock type ufs: EXCL (count 1) by thread 0xcd576000 (pid 21114)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc05fd950 at fsync+0x9c #5 0xc0723e2b at syscall+0x25b #6 0xc070ee0f at Xint0x80_syscall+0x1f ino 424412, on dev amrd0s1d 0xd1679570: tag ufs, type VREG usecount 1, writecount 1, refcount 69 mountedhere 0 flags () v_object 0xd1fd0318 ref 0 pages 9308 lock type ufs: EXCL (count 1) by thread 0xcd59ea80 (pid 65735)#0 0xc0593f0d at lockmgr+0x4ed #1 0xc06b8e0e at ffs_lock+0x76 #2 0xc0739787 at VOP_LOCK_APV+0x87 #3 0xc0601c28 at vn_lock+0xac #4 0xc06015c4 at vn_write+0x138 #5 0xc05c4544 at dofilewrite+0x7c #6 0xc05c43e3 at kern_writev+0x3b #7 0xc05c4309 at write+0x45 #8 0xc0723e2b at syscall+0x25b #9 0xc070ee0f at Xint0x80_syscall+0x1f ino 112037039, on dev amrd1s1d db> alltrace Tracing command pid 26548 tid 105114 td 0xd41c7000 *** error reading from address b4ba72d3 *** -----Original Message----- From: owner-freebsd-fs@freebsd.org [mailto:owner-freebsd-fs@freebsd.org] On Behalf Of Andrew Edwards Sent: Tuesday, May 22, 2007 1:35 PM To: freebsd-fs@freebsd.org; freebsd-performance@freebsd.org Subject: RE: Ufs dead-locks on freebsd 6.2 It's been a couple of days with no response, how do I know if anyone is looking into this problem? > -----Original Message----- > From: owner-freebsd-fs@freebsd.org [mailto:owner-freebsd-fs@freebsd.org] > On Behalf Of Andrew Edwards > Sent: Saturday, May 19, 2007 12:34 AM > To: freebsd-fs@freebsd.org; freebsd-performance@freebsd.org > Subject: RE: Ufs dead-locks on freebsd 6.2 >=20 > Fsck didn't help but below is a list of processes that were stuck in=20 > disk. Also, one potential problem I've hit is I have mrtg scripts that > get launched from cron every min. MRTG is supposed to have a locking=20 > mechanism to prevent the same script from running at the same time but I > suspect since the filesystem was unaccessible the cron jobs just kept=20 > piling up and piling up until the system would eventually crash. I=20 > caught it when the load avg. was at 620 and killed all the cron's I=20 > could. That brought the load avg. down to under 1 however system is=20 > still taking up 30% of the processor time and the disks are basically=20 > idle. I can still do an ls -l on the root of all my mounted ufs and nfs > filesystems but on one it's taking a considerable amount longer than the > rest. This particular rsync that I was running is copying into the /d2 > fs. >=20 > The system is still running and I can make tpc connections and=20 > somethings I have running from inetd work but ssh stops responding right > away and I can't logon via the console. So, I've captured a core dump > of the system and rebooted so that I could use it again. Are there any > suggestion as to what to do next? I'm debaiting installing an adaptec > raid and rebuilding the system to see if I get the same problem, my=20 > worry is that it's the intel raid drivers that are causing this problem > and I have 4 other systems with the same card. >=20 >=20 > PID TT STAT TIME COMMAND > 2 ?? DL 0:04.86 [g_event] > 3 ?? DL 2:05.90 [g_up] > 4 ?? DL 1:07.95 [g_down] > 5 ?? DL 0:00.00 [xpt_thrd] > 6 ?? DL 0:00.00 [kqueue taskq] > 7 ?? DL 0:00.00 [thread taskq] > 8 ?? DL 0:06.96 [pagedaemon] > 9 ?? DL 0:00.00 [vmdaemon] > 15 ?? DL 0:22.28 [yarrow] > 24 ?? DL 0:00.01 [usb0] > 25 ?? DL 0:00.00 [usbtask] > 27 ?? DL 0:00.01 [usb1] > 29 ?? DL 0:00.01 [usb2] > 36 ?? DL 1:28.73 [pagezero] > 37 ?? DL 0:08.76 [bufdaemon] > 38 ?? DL 0:00.54 [vnlru] > 39 ?? DL 1:08.12 [syncer] > 40 ?? DL 0:04.00 [softdepflush] > 41 ?? DL 0:11.05 [schedcpu] > 27182 ?? Ds 0:05.75 /usr/sbin/syslogd -l /var/run/log -l > /var/named/var/run/log -b 127.0.0.1 -a 10.128.0.0/10 > 27471 ?? Is 0:01.10 /usr/local/bin/postmaster -D > /usr/local/pgsql/data (postgres) > 27594 ?? Is 0:00.04 /usr/libexec/ftpd -m -D -l -l > 27602 ?? DL 0:00.28 [smbiod1] > 96581 ?? D 0:00.00 cron: running job (cron) > 96582 ?? D 0:00.00 cron: running job (cron) > 96583 ?? D 0:00.00 cron: running job (cron) > 96585 ?? D 0:00.00 cron: running job (cron) > 96586 ?? D 0:00.00 cron: running job (cron) > 96587 ?? D 0:00.00 cron: running job (cron) > 96588 ?? D 0:00.00 cron: running job (cron) > 96589 ?? D 0:00.00 cron: running job (cron) > 96590 ?? D 0:00.00 cron: running job (cron) > 96591 ?? D 0:00.00 cron: running job (cron) > 96592 ?? D 0:00.00 cron: running job (cron) > 96593 ?? D 0:00.00 cron: running job (cron) > 96594 ?? D 0:00.00 cron: running job (cron) > 96607 ?? D 0:00.00 cron: running job (cron) > 96608 ?? D 0:00.00 cron: running job (cron) > 96609 ?? D 0:00.00 cron: running job (cron) > 96610 ?? D 0:00.00 cron: running job (cron) > 96611 ?? D 0:00.00 cron: running job (cron) > 96612 ?? D 0:00.00 cron: running job (cron) > 96613 ?? D 0:00.00 cron: running job (cron) > 96614 ?? D 0:00.00 cron: running job (cron) > 96615 ?? D 0:00.00 cron: running job (cron) > 96616 ?? D 0:00.00 cron: running job (cron) > 96617 ?? D 0:00.00 cron: running job (cron) > 96631 ?? D 0:00.00 cron: running job (cron) > 96632 ?? D 0:00.00 cron: running job (cron) > 96633 ?? D 0:00.00 cron: running job (cron) > 96634 ?? D 0:00.00 cron: running job (cron) > 96635 ?? D 0:00.00 cron: running job (cron) > 96636 ?? D 0:00.00 cron: running job (cron) > 96637 ?? D 0:00.00 cron: running job (cron) > 96638 ?? D 0:00.00 cron: running job (cron) > 96639 ?? D 0:00.00 cron: running job (cron) > 96642 ?? D 0:00.00 cron: running job (cron) > 96650 ?? D 0:00.00 cron: running job (cron) > 29393 p0 D+ 22:04.58 /usr/local/bin/rsync >=20 > real 0m0.012s > user 0m0.000s > sys 0m0.010s > / >=20 > real 0m0.019s > user 0m0.000s > sys 0m0.016s > /var >=20 > real 0m0.028s > user 0m0.008s > sys 0m0.018s > /diskless >=20 > real 0m0.017s > user 0m0.008s > sys 0m0.007s > /usr >=20 > real 0m0.016s > user 0m0.000s > sys 0m0.015s > /d2 >=20 > real 0m0.024s > user 0m0.000s > sys 0m0.023s > /exports/home >=20 > real 0m2.559s > user 0m0.216s > sys 0m2.307s >=20
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