Reassigning to the linux package; the kernel team would more likely know if there is a fix available for this.
** Package changed: ubuntu => linux (Ubuntu) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1443325 Title: ISST-LTE:Ubuntu15.04: task aio-stress:12277 blocked for more than 120 seconds. Status in linux package in Ubuntu: New Bug description: == Comment: #0 - Hemant Kumar <hemantkba...@in.ibm.com> - 2015-04-13 01:29:44 == Defect Description: =============== I am having one ubuntu 15.04 LE lpar running with regression run(BASE/IO/TCP). After some hours of run i was not able to get virtual terminal of lpar but i am able to login via ssh. I did ssh and i saw these stack traces in dmesg: [14889.385371] blk_update_request: critical target error, dev dm-10, sector 13842352 [14889.385389] dm-16: WRITE SAME failed. Manually zeroing. [16080.244960] INFO: task aio-stress:12275 blocked for more than 120 seconds. [16080.244976] Not tainted 3.19.0-12-generic #12-Ubuntu [16080.244979] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [16080.244983] aio-stress D 00003fff7e420818 0 12275 12092 0x00040000 [16080.244985] Call Trace: [16080.244989] [c0000007704633f0] [c000000000015a4c] __switch_to+0x1fc/0x350 [16080.244992] [c000000770463440] [c000000000a3601c] __schedule+0x37c/0x8d0 [16080.244994] [c000000770463670] [c000000000a3a8b4] schedule_timeout+0x254/0x2f0 [16080.244996] [c000000770463760] [c000000000a377dc] wait_for_common+0xec/0x240 [16080.244998] [c0000007704637e0] [c0000000002ff1c8] writeback_inodes_sb_nr+0xb8/0xe0 [16080.245000] [c000000770463880] [c0000000002ffa78] try_to_writeback_inodes_sb_nr+0x98/0xd0 [16080.245002] [c0000007704638c0] [c0000000003774bc] ext4_nonda_switch+0xdc/0xf0 [16080.245004] [c000000770463900] [c00000000037e340] ext4_da_write_begin+0x90/0x3d0 [16080.245006] [c0000007704639c0] [c0000000002134f4] generic_perform_write+0xf4/0x280 [16080.245008] [c000000770463a60] [c0000000002159e0] __generic_file_write_iter+0x2a0/0x430 [16080.245009] [c000000770463ac0] [c000000000371428] ext4_file_write_iter+0x118/0x480 [16080.245011] [c000000770463b80] [c000000000329c78] aio_run_iocb+0x268/0x450 [16080.245013] [c000000770463ce0] [c00000000032afc4] do_io_submit+0x294/0x670 [16080.245015] [c000000770463e30] [c000000000009258] syscall_exit+0x0/0x98 [16080.245017] INFO: task aio-stress:12276 blocked for more than 120 seconds. [16080.245022] Not tainted 3.19.0-12-generic #12-Ubuntu [16080.245025] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. I am running IO regression run from last many weeks but i have not seen this issue in any previous kernel. root@riverlp1:~# cat /etc/issue Ubuntu Vivid Vervet (development branch) \n \l root@riverlp1:~# uname -a Linux riverlp1 3.19.0-12-generic #12-Ubuntu SMP Fri Apr 3 04:03:54 UTC 2015 ppc64le ppc64le ppc64le GNU/Linux root@riverlp1:~# Contact Info: hemantkba...@in.ibm.com == Comment: #1 - Hemant Kumar <hemantkba...@in.ibm.com> - 2015-04-13 01:32:40 == == Comment: #2 - Hemant Kumar <hemantkba...@in.ibm.com> - 2015-04-13 01:35:52 == To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1443325/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
