[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
i have to confirm this problem Kernel distribution version Nov 27 08:34:44 core kernel: [0.00] Linux version 2.6.31-22-server (bui...@allspice) (gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu9) ) #68-Ubuntu SMP Tue Oct 26 16:50:02 UTC 2010 (Ubuntu 2.6.31-22.68-serv er) kern.log Nov 27 04:41:54 core kernel: [1242602.033782] INFO: task kjournald2:407 blocked for more than 120 seconds. Nov 27 04:41:54 core kernel: [1242602.033799] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. Nov 27 04:41:54 core kernel: [1242602.033813] kjournald2D 0 407 2 0x Nov 27 04:41:54 core kernel: [1242602.033820] 8801205fbad0 0046 0002 00015880 Nov 27 04:41:54 core kernel: [1242602.033827] 8801210b47c0 00015880 00015880 00015880 Nov 27 04:41:54 core kernel: [1242602.033832] 00015880 8801210b47c0 00015880 00015880 Nov 27 04:41:54 core kernel: [1242602.033839] Call Trace: Nov 27 04:41:54 core kernel: [1242602.033857] [810da1e0] ? sync_page+0x0/0x50 Nov 27 04:41:54 core kernel: [1242602.033864] [81529cd8] io_schedule+0x28/0x40 Nov 27 04:41:54 core kernel: [1242602.033868] [810da21d] sync_page+0x3d/0x50 Nov 27 04:41:54 core kernel: [1242602.033872] [8152a1f7] __wait_on_bit+0x57/0x80 Nov 27 04:41:54 core kernel: [1242602.033876] [810da38e] wait_on_page_bit+0x6e/0x80 Nov 27 04:41:54 core kernel: [1242602.033882] [810785b0] ? wake_bit_function+0x0/0x40 Nov 27 04:41:54 core kernel: [1242602.033888] [810e4640] ? pagevec_lookup_tag+0x20/0x30 Nov 27 04:41:54 core kernel: [1242602.033893] [810da835] wait_on_page_writeback_range+0xf5/0x190 Nov 27 04:41:54 core kernel: [1242602.033899] [811ee9a9] ? jbd2_journal_file_buffer+0x59/0x80 Nov 27 04:41:54 core kernel: [1242602.033903] [810da8f7] filemap_fdatawait+0x27/0x30 Nov 27 04:41:54 core kernel: [1242602.033907] [811ef896] journal_finish_inode_data_buffers+0x56/0x150 Nov 27 04:41:54 core kernel: [1242602.033911] [811f03b6] jbd2_journal_commit_transaction+0x6d6/0x1100 Nov 27 04:41:54 core kernel: [1242602.033917] [811f5e33] kjournald2+0x103/0x270 Nov 27 04:41:54 core kernel: [1242602.033921] [81078570] ? autoremove_wake_function+0x0/0x40 Nov 27 04:41:54 core kernel: [1242602.033926] [811f5d30] ? kjournald2+0x0/0x270 Nov 27 04:41:54 core kernel: [1242602.033929] [81078186] kthread+0xa6/0xb0 Nov 27 04:41:54 core kernel: [1242602.033935] [8101312a] child_rip+0xa/0x20 Nov 27 04:41:54 core kernel: [1242602.033939] [810780e0] ? kthread+0x0/0xb0 Nov 27 04:41:54 core kernel: [1242602.033942] [81013120] ? child_rip+0x0/0x20 Nov 27 04:41:54 core kernel: [1242602.033960] INFO: task bash:13216 blocked for more than 120 seconds. Nov 27 04:41:54 core kernel: [1242602.033970] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. Nov 27 04:41:54 core kernel: [1242602.034014] bash D 0 13216 13215 0x Nov 27 04:41:54 core kernel: [1242602.034019] 88009853d818 0086 88009853d7a8 00015880 Nov 27 04:41:54 core kernel: [1242602.034025] 88008fa8de70 00015880 00015880 00015880 Nov 27 04:41:54 core kernel: [1242602.034030] 00015880 88008fa8de70 00015880 00015880 Nov 27 04:41:54 core kernel: [1242602.034035] Call Trace: Nov 27 04:41:54 core kernel: [1242602.034040] [81529cd8] io_schedule+0x28/0x40 Nov 27 04:41:54 core kernel: [1242602.034045] [812664c7] get_request_wait+0xc7/0x1a0 Nov 27 04:41:54 core kernel: [1242602.034049] [81078570] ? autoremove_wake_function+0x0/0x40 Nov 27 04:41:54 core kernel: [1242602.034054] [8125b33b] ? elv_merge+0x1cb/0x200 Nov 27 04:41:54 core kernel: [1242602.034058] [81266633] __make_request+0x93/0x440 Nov 27 04:41:54 core kernel: [1242602.034062] [81114aba] ? __slab_alloc+0x8a/0x2d0 Nov 27 04:41:54 core kernel: [1242602.034066] [8126515b] generic_make_request+0x19b/0x4c0 Nov 27 04:41:54 core kernel: [1242602.034070] [810dc6f0] ? mempool_alloc_slab+0x10/0x20 Nov 27 04:41:54 core kernel: [1242602.034076] [81144f64] ? alloc_buffer_head+0x44/0x50 Nov 27 04:41:54 core kernel: [1242602.034080] [812654fd] submit_bio+0x7d/0x110 Nov 27 04:41:54 core kernel: [1242602.034084] [81145452] submit_bh+0xf2/0x130 Nov 27 04:41:54 core kernel: [1242602.034088] [81146e63] ll_rw_block+0x123/0x130 Nov 27 04:41:54 core kernel: [1242602.034092] [81146e99] __breadahead+0x29/0x40 Nov 27 04:41:54 core kernel: [1242602.034097] [811b3a6e] __ext4_get_inode_loc+0x32e/0x3b0 Nov 27 04:41:54 core kernel: [1242602.034101] [811b3b6e] ext4_iget+0x7e/0x7f0 Nov 27 04:41:54 core
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
This is still happening in 10.04.1, both with the default Ubuntu server kernel and with the ppa kernel: Linux topaz 2.6.35-22-server #33~lucid1-Ubuntu SMP Sat Sep 18 13:29:53 UTC 2010 x86_64 GNU/Linux Oct 4 09:32:44 topaz kernel: [405000.890225] INFO: task scp:27169 blocked for more than 120 seconds. Oct 4 09:32:44 topaz kernel: [405000.890231] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. Oct 4 09:32:44 topaz kernel: [405000.890234] scp D 00010267dc02 0 27169 29503 0x0004 Oct 4 09:32:44 topaz kernel: [405000.890241] 88012f8b9c08 0086 8802 00015980 Oct 4 09:32:44 topaz kernel: [405000.890248] 88012f8b9fd8 00015980 88012f8b9fd8 88011cdb5b80 Oct 4 09:32:44 topaz kernel: [405000.890254] 00015980 00015980 88012f8b9fd8 00015980 Oct 4 09:32:44 topaz kernel: [405000.890259] Call Trace: Oct 4 09:32:44 topaz kernel: [405000.890272] [81100b60] ? sync_page+0x0/0x50 Oct 4 09:32:44 topaz kernel: [405000.890279] [8159ca93] io_schedule+0x73/0xc0 Oct 4 09:32:44 topaz kernel: [405000.890283] [81100b9d] sync_page+0x3d/0x50 Oct 4 09:32:44 topaz kernel: [405000.890287] [8159d10f] __wait_on_bit+0x5f/0x90 Oct 4 09:32:44 topaz kernel: [405000.890292] [81100d53] wait_on_page_bit+0x73/0x80 Oct 4 09:32:44 topaz kernel: [405000.890297] [8107f120] ? wake_bit_function+0x0/0x40 Oct 4 09:32:44 topaz kernel: [405000.890303] [8110b675] ? pagevec_lookup_tag+0x25/0x40 Oct 4 09:32:44 topaz kernel: [405000.890307] [8110121d] filemap_fdatawait_range+0x10d/0x1a0 Oct 4 09:32:44 topaz kernel: [405000.890312] [811012db] filemap_fdatawait+0x2b/0x30 Oct 4 09:32:44 topaz kernel: [405000.890316] [811015e4] filemap_write_and_wait+0x44/0x50 Oct 4 09:32:44 topaz kernel: [405000.890334] [a01abf3c] nfs_setattr+0x14c/0x160 [nfs] Oct 4 09:32:44 topaz kernel: [405000.890341] [8116bebb] notify_change+0x16b/0x310 Oct 4 09:32:44 topaz kernel: [405000.890347] [8135cb9e] ? tty_ldisc_deref+0xe/0x10 Oct 4 09:32:44 topaz kernel: [405000.890352] [81152364] do_truncate+0x64/0xa0 Oct 4 09:32:44 topaz kernel: [405000.890356] [811525fb] T.782+0xeb/0x110 Oct 4 09:32:44 topaz kernel: [405000.890360] [8115262e] sys_ftruncate+0xe/0x10 Oct 4 09:32:44 topaz kernel: [405000.890366] [8100a0f2] system_call_fastpath+0x16/0x1b Oct 4 09:32:44 topaz kernel: [405000.890371] INFO: task flush-0:26:27661 blocked for more than 120 seconds. Oct 4 09:32:44 topaz kernel: [405000.890373] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. Oct 4 09:32:44 topaz kernel: [405000.890376] flush-0:26D 000102694b5b 0 27661 2 0x Oct 4 09:32:44 topaz kernel: [405000.890383] 8801324fda40 0046 00015980 Oct 4 09:32:44 topaz kernel: [405000.890388] 8801324fdfd8 00015980 8801324fdfd8 88015ab28000 Oct 4 09:32:44 topaz kernel: [405000.890394] 00015980 00015980 8801324fdfd8 00015980 Oct 4 09:32:44 topaz kernel: [405000.890399] Call Trace: Oct 4 09:32:44 topaz kernel: [405000.890404] [81100b60] ? sync_page+0x0/0x50 Oct 4 09:32:44 topaz kernel: [405000.890410] [8159ca93] io_schedule+0x73/0xc0 Oct 4 09:32:44 topaz kernel: [405000.890415] [81100b9d] sync_page+0x3d/0x50 Oct 4 09:32:44 topaz kernel: [405000.890420] [8159d10f] __wait_on_bit+0x5f/0x90 Oct 4 09:32:44 topaz kernel: [405000.890423] [81100d53] wait_on_page_bit+0x73/0x80 Oct 4 09:32:44 topaz kernel: [405000.890428] [8107f120] ? wake_bit_function+0x0/0x40 Oct 4 09:32:44 topaz kernel: [405000.890432] [8110b675] ? pagevec_lookup_tag+0x25/0x40 Oct 4 09:32:44 topaz kernel: [405000.890436] [8110121d] filemap_fdatawait_range+0x10d/0x1a0 Oct 4 09:32:44 topaz kernel: [405000.890441] [811012db] filemap_fdatawait+0x2b/0x30 Oct 4 09:32:44 topaz kernel: [405000.890446] [81175648] writeback_single_inode+0x2e8/0x3f0 Oct 4 09:32:44 topaz kernel: [405000.890451] [81175ba5] writeback_sb_inodes+0x195/0x280 Oct 4 09:32:44 topaz kernel: [405000.890455] [811765fc] wb_writeback+0x12c/0x2b0 Oct 4 09:32:44 topaz kernel: [405000.890461] [8106fefc] ? lock_timer_base+0x3c/0x70 Oct 4 09:32:44 topaz kernel: [405000.890465] [810709f2] ? del_timer_sync+0x22/0x30 Oct 4 09:32:44 topaz kernel: [405000.890470] [81176829] wb_do_writeback+0xa9/0x190 Oct 4 09:32:44 topaz kernel: [405000.890474] [81070010] ? process_timeout+0x0/0x10 Oct 4 09:32:44 topaz kernel: [405000.890479] [81176963] bdi_writeback_task+0x53/0x160 Oct 4 09:32:44 topaz kernel: [405000.890483] [8107efa7] ? bit_waitqueue+0x17/0xd0 Oct 4 09:32:44 topaz
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
For the information of this bug's followers, installing cgroup-bin caused me lock-ups and INFO: task * blocked for more than 120 seconds messages. https://bugs.launchpad.net/ubuntu/+source/libcgroup/+bug/598335 -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
Please check this bug: https://bugzilla.kernel.org/show_bug.cgi?id=16219 I have same problems described here and I have found that in my case it is a kernel bug related to GUID partition tables I am still writing the bug report. ** Bug watch added: Linux Kernel Bug Tracker #16219 http://bugzilla.kernel.org/show_bug.cgi?id=16219 -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
Since there are no additional comments in bug #494476, has anyone launched a new report? As Darren pointed out above, it might be useful to have a template to look at when submitting related bugs. Searching for bugs where tasks are blocked for more than 120 seconds gives heaps of results but it's difficult to tell if they're related or not - some are even tagged as fixed. -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
tom, Please file a new bug regardless. The Ubuntu Kernel Team is moving to a model whereby all affected reporters open new bug so that specific data can be logged for each of them. I want all affected reporters to open new bug reports for this issue. Thanks! ~JFo -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 276476] Re: Idle-priority scheduling bug blocks tasks
Hi, I think this makes sense. Even though it may result in a common fix for all. But one thing that might help, is maybe provide a set of steps for how to file information about this sort of bug. Some of us aren't kernel experts, but if we can gather the information in a common way when we open a new bug, it could help you. Darren tom, Please file a new bug regardless. The Ubuntu Kernel Team is moving to a model whereby all affected reporters open new bug so that specific data can be logged for each of them. I want all affected reporters to open new bug reports for this issue. Thanks! ~JFo -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a direct subscriber of the bug. Status in âlinuxâ package in Ubuntu: Fix Released Bug description: INFO: task blocked for more than 120 seconds is a diagnostic message for when a process that wants to run is blocked from running for a long time. This bug report refers to a specific problem with idle-priority scheduling that has now been fixed. If you are up to date and are still getting the task blocked message, it is a different bug, so please file a new bug report. To unsubscribe from this bug, go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/276476/+subscribe -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
** Summary changed: - INFO: task blocked for more than 120 seconds causes system freeze + Idle-priority scheduling bug blocks tasks -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
** Description changed: - The following commits can be cleanly cherry-picked into 2.6.28 to fix this bug: - cce7ade803699463ecc62a065ca522004f7ccb3d - 6bc912b71b6f33b041cfde93ca3f019cbaa852bc + INFO: task blocked for more than 120 seconds is a diagnostic message + for when a process that wants to run is blocked from running for a long + time. - Original description: - Npviewer segfaults when visiting a website on Firefox with flash content. After that thunderbird, firefox stop responding and they have to be force quitted. Their processes (thunderbird.bin and firefox) can't be killed with kill -9 or killall. After a while these messages turn up on terminal: - - (taken from kern.log) - Sep 30 22:37:19 ubuntu kernel: [19808.392380] INFO: task thunderbird-bin:28288 blocked for more than 120 seconds. - Sep 30 22:37:19 ubuntu kernel: [19808.392418] echo 0 /proc/sys/kernel/hung_task_timeout_secs disables this message. - - I have to reboot using Sysreq + reisub. - - This happens at least once a day on fully updated (as of 30.09.2008) - Intrebid Ibex on x86_64. - - uname -a: Linux ubuntu 2.6.27-4-generic #1 SMP Wed Sep 24 01:29:06 UTC - 2008 x86_64 GNU/Linux - - Attached kern.log with relevant bits of two separate occasions. + This bug report refers to a specific problem with idle-priority + scheduling that has now been fixed. If you are up to date and are still + getting the task blocked message, it is a different bug, so please + file a new bug report. -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
So you're saying people who are still affected by the task blocked for more than 120 seconds bug should all file their own report (like Alvin suggested in #50)? Or can we just all add to bug 494476? -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 276476] Re: Idle-priority scheduling bug blocks tasks
If it appears to have the same cause (in this case, ext4 access or perhaps disk access in general), then follow that bug. If it appears to be triggered by something else, file a new bug. If in doubt, file a new bug. It can always be marked as a duplicate later if after investigation it's revealed to be the same issue. -- Idle-priority scheduling bug blocks tasks https://bugs.launchpad.net/bugs/276476 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
