On 12/13/2011 12:45 PM, Ray Morris wrote: > I've been struggling for some time with a problem wherein at times > the machine locks up, with access throgh LVM hanging. I can read and > write the physical volumes with "dd", but trying to read or write > the logical volume hangs. pvdisplay also hangs. The PVs, which seem > to accept writes just fine, are mdadm raid volumes. > > I experienced this before under 5.7 and am now experiencing the same > with 6.0 using lvm2-2.02.72-8.el6_0.4.x86_64. I've also experienced > it on entirely different hardware, with different controller chipsets. > > I'm pretty much at my wits end and would appreciate any pointers as > to where to look next. > The differences between our current lvm.conf and the default are as > follows: > > 53c53 > < filter = [ "a/.*/" ] > --- > 54a55 >> filter = [ "a|^/dev/md.*|", "a|^/dev/sd.*|", "a|^/dev/etherd/.*|","r|^/dev/ram.*|", "r|block|", "r/.*/" ] > Is it intentional to include sd devices? Just because the MD uses them doesn't mean you have to make allowances for them here. > 101,104d101 > < > 118,120c115,117 > --- > 129d125 > 139,144d134 > < disable_after_error_count = 0 > < > > > Extra logging > 191c162 > < level = 0 > --- >> level = 5 > 198c169 > < command_names = 0 > --- >> command_names = 1 > 270c241 > < units = "h" > --- >> units = "G" > 331c302 > < locking_dir = "/var/lock/lvm" > --- >> locking_dir = "/dev/shm" Why? > 356,362d326 > < > < metadata_read_only = 0 > 407c371 > < > --- > > 535a481 >> pvmetadatasize = 32768 > > > When the machine locks up, /var/log/messages shows processes "blocked > for more than 120 seconds" as shown below. What other information > should I be loooking to diagnose and resolve this issue? > > > Dec 13 09:13:26 clonebox3 lvm[32461]: Using logical volume(s) on command line > Dec 13 09:15:52 clonebox3 kernel: INFO: task kdmflush:31627 blocked for more than 120 seconds. > Dec 13 09:15:52 clonebox3 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > Dec 13 09:15:52 clonebox3 kernel: kdmflush D ffff88007b824300 0 31627 2 0x00000080 > Dec 13 09:15:52 clonebox3 kernel: ffff8800372af9f0 0000000000000046 ffff8800372af9b8 ffff8800372af9b4 > Dec 13 09:15:52 clonebox3 kernel: ffff8800372af9e0 ffff88007b824300 ffff880001e96980 00000001083f7318 > Dec 13 09:15:52 clonebox3 kernel: ffff880076f27ad8 ffff8800372affd8 0000000000010518 ffff880076f27ad8 > Dec 13 09:15:52 clonebox3 kernel: Call Trace: > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa01feca5>] raid5_quiesce+0x125/0x1a0 [raid456] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8105c580>] ? default_wake_function+0x0/0x20 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff810563f3>] ? __wake_up+0x53/0x70 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa02070c1>] make_request+0x501/0x520 [raid456] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8102ea69>] ? native_smp_send_reschedule+0x49/0x60 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff810508e8>] ? resched_task+0x68/0x80 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff813d09fb>] md_make_request+0xcb/0x230 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8105c484>] ? try_to_wake_up+0x284/0x380 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff81241982>] generic_make_request+0x1b2/0x4f0 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8110e925>] ? mempool_alloc_slab+0x15/0x20 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8110ea33>] ? mempool_alloc+0x63/0x140 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa00016bd>] __map_bio+0xad/0x130 [dm_mod] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa00017ef>] __issue_target_requests+0xaf/0xd0 [dm_mod] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa000351f>] __split_and_process_bio+0x59f/0x630 [dm_mod] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8109225c>] ? remove_wait_queue+0x3c/0x50 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa00029c4>] ? dm_wait_for_completion+0xd4/0x100 [dm_mod] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa0003836>] dm_flush+0x56/0x70 [dm_mod] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa00038a4>] dm_wq_work+0x54/0x200 [dm_mod] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffffa0003850>] ? dm_wq_work+0x0/0x200 [dm_mod] > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8108c7d0>] worker_thread+0x170/0x2a0 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff81091ea0>] ? autoremove_wake_function+0x0/0x40 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff8108c660>] ? worker_thread+0x0/0x2a0 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff81091b36>] kthread+0x96/0xa0 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff810141ca>] child_rip+0xa/0x20 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff81091aa0>] ? kthread+0x0/0xa0 > Dec 13 09:15:52 clonebox3 kernel: [<ffffffff810141c0>] ? child_rip+0x0/0x20 > Dec 13 09:15:52 clonebox3 kernel: INFO: task kcopyd:31629 blocked for more than 120 seconds. > Dec 13 09:15:52 clonebox3 kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > Dec 13 09:15:52 clonebox3 kernel: kcopyd D ffff88007b824700 0 31629 2 0x00000080 > Dec 13 09:15:52 clonebox3 kernel: ffff880044aa7ac0 0000000000000046 ffff880044aa7a88 ffff880044aa7a84 > Dec 13 09:15:52 clonebox3 kernel: ffff880044aa7ae0 ffff88007b824700 ffff880001e16980 00000001083f7280 > Do you by any chance have active LVM snapshots? If so how many and how long have they been provisioned for? Peter _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
