Also on observed on one of my machines.
- Linux RAID10 (f2) - SATA disks - Ext4 - KVM - Multi gigabyte files (qcow2 images) - Multiple frozen, unkillable 'lvcreate --snapshot' commands
[1360167.174975] INFO: task flush-251:4:479 blocked for more than 120 seconds. [1360167.187216] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1360167.211359] flush-251:4 D ffff88031d2e33d8 0 479 2 0x00000000 [1360167.211363] ffff88031f7c9bb0 0000000000000046 0000000000015bc0 0000000000015bc0 [1360167.211366] ffff880322589ab0 ffff88031f7c9fd8 0000000000015bc0 ffff8803225896f0 [1360167.211369] 0000000000015bc0 ffff88031f7c9fd8 0000000000015bc0 ffff880322589ab0 [1360167.211371] Call Trace: [1360167.211377] [<ffffffff811f632d>] ext4_force_commit+0x8d/0xe0 [1360167.211381] [<ffffffff81085090>] ? autoremove_wake_function+0x0/0x40 [1360167.211385] [<ffffffff811de405>] ext4_write_inode+0x75/0x110 [1360167.211388] [<ffffffff81166a64>] writeback_single_inode+0x2b4/0x3d0 [1360167.211390] [<ffffffff8116750e>] writeback_inodes_wb+0x40e/0x5e0 [1360167.211393] [<ffffffff810586b0>] ? finish_task_switch+0x50/0xe0 [1360167.211395] [<ffffffff811677ea>] wb_writeback+0x10a/0x1d0 [1360167.211398] [<ffffffff81077719>] ? try_to_del_timer_sync+0x79/0xd0 [1360167.211402] [<ffffffff81558d9d>] ? schedule_timeout+0x19d/0x300 [1360167.211404] [<ffffffff81167abd>] wb_do_writeback+0x12d/0x1a0 [1360167.211406] [<ffffffff81167b83>] bdi_writeback_task+0x53/0xe0 [1360167.211409] [<ffffffff8110f546>] bdi_start_fn+0x86/0x100 [1360167.211411] [<ffffffff8110f4c0>] ? bdi_start_fn+0x0/0x100 [1360167.211413] [<ffffffff81084d16>] kthread+0x96/0xa0 [1360167.211416] [<ffffffff810141ea>] child_rip+0xa/0x20 [1360167.211418] [<ffffffff81084c80>] ? kthread+0x0/0xa0 [1360167.211419] [<ffffffff810141e0>] ? child_rip+0x0/0x20
Also on observed on one of my machines.
- Linux RAID10 (f2)
- SATA disks
- Ext4
- KVM
- Multi gigabyte files (qcow2 images)
- Multiple frozen, unkillable 'lvcreate --snapshot' commands
[1360167.174975] INFO: task flush-251:4:479 blocked for more than 120 seconds. kernel/ hung_task_ timeout_ secs" disables this message. 32d>] ext4_force_ commit+ 0x8d/0xe0 090>] ? autoremove_ wake_function+ 0x0/0x40 405>] ext4_write_ inode+0x75/ 0x110 a64>] writeback_ single_ inode+0x2b4/ 0x3d0 50e>] writeback_ inodes_ wb+0x40e/ 0x5e0 6b0>] ? finish_ task_switch+ 0x50/0xe0 7ea>] wb_writeback+ 0x10a/0x1d0 719>] ? try_to_ del_timer_ sync+0x79/ 0xd0 d9d>] ? schedule_ timeout+ 0x19d/0x300 abd>] wb_do_writeback +0x12d/ 0x1a0 b83>] bdi_writeback_ task+0x53/ 0xe0 546>] bdi_start_ fn+0x86/ 0x100 4c0>] ? bdi_start_ fn+0x0/ 0x100 d16>] kthread+0x96/0xa0 1ea>] child_rip+0xa/0x20 c80>] ? kthread+0x0/0xa0 1e0>] ? child_rip+0x0/0x20
[1360167.187216] "echo 0 > /proc/sys/
[1360167.211359] flush-251:4 D ffff88031d2e33d8 0 479 2 0x00000000
[1360167.211363] ffff88031f7c9bb0 0000000000000046 0000000000015bc0 0000000000015bc0
[1360167.211366] ffff880322589ab0 ffff88031f7c9fd8 0000000000015bc0 ffff8803225896f0
[1360167.211369] 0000000000015bc0 ffff88031f7c9fd8 0000000000015bc0 ffff880322589ab0
[1360167.211371] Call Trace:
[1360167.211377] [<ffffffff811f6
[1360167.211381] [<ffffffff81085
[1360167.211385] [<ffffffff811de
[1360167.211388] [<ffffffff81166
[1360167.211390] [<ffffffff81167
[1360167.211393] [<ffffffff81058
[1360167.211395] [<ffffffff81167
[1360167.211398] [<ffffffff81077
[1360167.211402] [<ffffffff81558
[1360167.211404] [<ffffffff81167
[1360167.211406] [<ffffffff81167
[1360167.211409] [<ffffffff8110f
[1360167.211411] [<ffffffff8110f
[1360167.211413] [<ffffffff81084
[1360167.211416] [<ffffffff81014
[1360167.211418] [<ffffffff81084
[1360167.211419] [<ffffffff81014