Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754969Ab2BFMYr (ORCPT ); Mon, 6 Feb 2012 07:24:47 -0500 Received: from krak.alatek.krakow.pl ([46.170.108.42]:57942 "HELO krak.alatek.krakow.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754889Ab2BFMYO (ORCPT ); Mon, 6 Feb 2012 07:24:14 -0500 X-Greylist: delayed 1326 seconds by postgrey-1.27 at vger.kernel.org; Mon, 06 Feb 2012 07:24:13 EST From: Pawel Sikora To: linux-kernel@vger.kernel.org Cc: gregkh@linuxfoundation.org, arekm@pld-linux.org, neilb@suse.de Subject: [3.2.2] tasks blocked during matrix auto checking. Date: Mon, 06 Feb 2012 13:02 +0100 Message-ID: <2156863.jdbU24e2Kr@pawels> User-Agent: KMail/4.8.0 (Linux/3.0.19-1; KDE/4.8.0; x86_64; ; ) MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 24624 Lines: 355 Hi, on heavy loaded opterons i've noticed some blocked tasks during matrix auto checking. is it a known issue? (...) [401836.109354] md: data-check of RAID array md0 [401836.109364] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. [401836.109368] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check. [401836.109388] md: using 128k window, over a total of 8000256k. [401836.111441] md: delaying data-check of md2 until md0 has finished (they share one or more physical units) [401914.274728] md: md0: data-check done. [401914.293562] md: data-check of RAID array md2 [401914.293566] md: minimum _guaranteed_ speed: 1000 KB/sec/disk. [401914.293569] md: using maximum available idle IO bandwidth (but not more than 200000 KB/sec) for data-check. [401914.293589] md: using 128k window, over a total of 849514496k. [402723.026480] INFO: task kjournald:1546 blocked for more than 120 seconds. [402723.026484] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [402723.026488] kjournald D 0000000107312539 0 1546 2 0x00000000 [402723.026494] ffff88030ae67cd0 0000000000000046 ffff880f00000000 ffffffffa00768b1 [402723.026503] ffff88030b81bd40 ffff88030ae67fd8 ffff88030ae67fd8 ffff88030ae67fd8 [402723.026509] ffff88030bcb4c90 ffff88030b81bd40 ffff88030ae67ce0 0000000104dd2828 [402723.026515] Call Trace: [402723.026544] [] ? journal_commit_transaction+0x151/0x13d0 [jbd] [402723.026552] [] schedule+0x3a/0x50 [402723.026560] [] journal_commit_transaction+0x156/0x13d0 [jbd] [402723.026567] [] ? try_to_del_timer_sync+0x8d/0x130 [402723.026572] [] ? _raw_spin_unlock_irqrestore+0x3a/0x70 [402723.026577] [] ? trace_hardirqs_on+0xd/0x10 [402723.026582] [] ? __init_waitqueue_head+0x60/0x60 [402723.026587] [] ? try_to_del_timer_sync+0x130/0x130 [402723.026594] [] kjournald+0xeb/0x250 [jbd] [402723.026598] [] ? __init_waitqueue_head+0x60/0x60 [402723.026606] [] ? commit_timeout+0x10/0x10 [jbd] [402723.026610] [] kthread+0xa2/0xb0 [402723.026613] [] ? trace_hardirqs_on+0xd/0x10 [402723.026618] [] kernel_thread_helper+0x4/0x10 [402723.026622] [] ? retint_restore_args+0x13/0x13 [402723.026626] [] ? __init_kthread_worker+0x70/0x70 [402723.026630] [] ? gs_change+0x13/0x13 [402723.026632] no locks held by kjournald/1546. [402723.026642] INFO: task nscd:3037 blocked for more than 120 seconds. [402723.026645] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [402723.026647] nscd D 0000000107312a90 0 3037 1 0x00000000 [402723.026652] ffff880f04fb7df8 0000000000000046 ffff880300000000 ffffffff814a18e6 [402723.026658] ffff880f04c49ea0 ffff880f04fb7fd8 ffff880f04fb7fd8 ffff880f04fb7fd8 [402723.026663] ffff88030bce0f50 ffff880f04c49ea0 ffff880f04fb7dd8 0000000100000006 [402723.026668] Call Trace: [402723.026672] [] ? rwsem_down_failed_common+0xa6/0x150 [402723.026677] [] schedule+0x3a/0x50 [402723.026681] [] rwsem_down_failed_common+0xb5/0x150 [402723.026686] [] rwsem_down_write_failed+0x13/0x20 [402723.026692] [] call_rwsem_down_write_failed+0x13/0x20 [402723.026696] [] ? down_write+0x4d/0x60 [402723.026701] [] ? sys_mmap_pgoff+0x125/0x230 [402723.026707] [] ? sysret_check+0x2e/0x69 [402723.026710] [] sys_mmap_pgoff+0x125/0x230 [402723.026714] [] ? trace_hardirqs_on_thunk+0x3a/0x3f [402723.026720] [] sys_mmap+0x1d/0x20 [402723.026724] [] system_call_fastpath+0x16/0x1b [402723.026727] 1 lock held by nscd/3037: [402723.026729] #0: (&mm->mmap_sem){++++++}, at: [] sys_mmap_pgoff+0x125/0x230 [402723.026737] INFO: task nscd:3039 blocked for more than 120 seconds. [402723.026740] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [402723.026742] nscd D 0000000107311eb7 0 3039 1 0x00000000 [402723.026746] ffff880f047cd8b8 0000000000000046 ffffffff00000000 ffff880f047cd970 [402723.026752] ffff880f04c4dbe0 ffff880f047cdfd8 ffff880f047cdfd8 ffff880f047cdfd8 [402723.026757] ffffffff8180d020 ffff880f04c4dbe0 ffff880f047cd8b8 000000018108c4a8 [402723.026762] Call Trace: [402723.026767] [] ? __wait_on_buffer+0x30/0x30 [402723.026771] [] schedule+0x3a/0x50 [402723.026774] [] io_schedule+0x8a/0xd0 [402723.026777] [] sleep_on_buffer+0x9/0x10 [402723.026781] [] __wait_on_bit_lock+0x52/0xb0 [402723.026785] [] ? __lock_acquire+0x4cb/0x1ce0 [402723.026788] [] ? __wait_on_buffer+0x30/0x30 [402723.026793] [] out_of_line_wait_on_bit_lock+0x77/0x90 [402723.026797] [] ? autoremove_wake_function+0x40/0x40 [402723.026801] [] __lock_buffer+0x2e/0x30 [402723.026808] [] do_get_write_access+0x49c/0x500 [jbd] [402723.026812] [] ? __find_get_block+0xc6/0x220 [402723.026819] [] ? start_this_handle+0x358/0x450 [jbd] [402723.026822] [] ? __getblk+0x27/0x280 [402723.026837] [] ? ext3_dirty_inode+0x59/0x90 [ext3] [402723.026844] [] journal_get_write_access+0x2b/0x50 [jbd] [402723.026857] [] __ext3_journal_get_write_access+0x28/0x60 [ext3] [402723.026866] [] ext3_reserve_inode_write+0x73/0xa0 [ext3] [402723.026876] [] ext3_mark_inode_dirty+0x3f/0xc0 [ext3] [402723.026882] [] ? journal_start+0x117/0x190 [jbd] [402723.026891] [] ext3_dirty_inode+0x59/0x90 [ext3] [402723.026897] [] __mark_inode_dirty+0x37/0x240 [402723.026902] [] file_update_time+0xcf/0x130 [402723.026906] [] ? __set_page_dirty_buffers+0xc4/0xe0 [402723.026910] [] do_wp_page+0x39c/0x6c0 [402723.026914] [] handle_pte_fault+0x26d/0xa00 [402723.026919] [] ? mem_cgroup_count_vm_event+0x16/0xb0 [402723.026923] [] ? mem_cgroup_count_vm_event+0x7a/0xb0 [402723.026927] [] handle_mm_fault+0x1d8/0x2e0 [402723.026932] [] do_page_fault+0x145/0x500 [402723.026938] [] ? vfsmount_lock_local_unlock+0x1c/0x30 [402723.026942] [] ? mntput_no_expire+0x2b/0xe0 [402723.026947] [] ? mntput+0x1a/0x30 [402723.026952] [] ? fput+0x191/0x270 [402723.026956] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [402723.026960] [] page_fault+0x25/0x30 [402723.026964] 2 locks held by nscd/3039: [402723.026965] #0: (&mm->mmap_sem){++++++}, at: [] do_page_fault+0xe0/0x500 [402723.026971] #1: (jbd_handle){+.+...}, at: [] start_this_handle+0x358/0x450 [jbd] [403443.026433] INFO: task kjournald:1546 blocked for more than 120 seconds. [403443.026437] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [403443.026441] kjournald D 000000010734d6f2 0 1546 2 0x00000000 [403443.026447] ffff88030ae67cd0 0000000000000046 ffff880f00000000 ffffffffa00768b1 [403443.026456] ffff88030b81bd40 ffff88030ae67fd8 ffff88030ae67fd8 ffff88030ae67fd8 [403443.026461] ffffffff8180d020 ffff88030b81bd40 ffff88030ae67ce0 0000000104dd2828 [403443.026467] Call Trace: [403443.026496] [] ? journal_commit_transaction+0x151/0x13d0 [jbd] [403443.026504] [] schedule+0x3a/0x50 [403443.026512] [] journal_commit_transaction+0x156/0x13d0 [jbd] [403443.026519] [] ? try_to_del_timer_sync+0x8d/0x130 [403443.026524] [] ? _raw_spin_unlock_irqrestore+0x3a/0x70 [403443.026529] [] ? trace_hardirqs_on+0xd/0x10 [403443.026535] [] ? __init_waitqueue_head+0x60/0x60 [403443.026539] [] ? try_to_del_timer_sync+0x130/0x130 [403443.026547] [] kjournald+0xeb/0x250 [jbd] [403443.026551] [] ? __init_waitqueue_head+0x60/0x60 [403443.026558] [] ? commit_timeout+0x10/0x10 [jbd] [403443.026562] [] kthread+0xa2/0xb0 [403443.026565] [] ? trace_hardirqs_on+0xd/0x10 [403443.026571] [] kernel_thread_helper+0x4/0x10 [403443.026575] [] ? retint_restore_args+0x13/0x13 [403443.026578] [] ? __init_kthread_worker+0x70/0x70 [403443.026582] [] ? gs_change+0x13/0x13 [403443.026585] no locks held by kjournald/1546. [403443.026594] INFO: task nscd:3039 blocked for more than 120 seconds. [403443.026596] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [403443.026599] nscd D 000000010734d0dc 0 3039 1 0x00000000 [403443.026604] ffff880f047cd8b8 0000000000000046 ffffffff00000000 ffff880f047cd970 [403443.026610] ffff880f04c4dbe0 ffff880f047cdfd8 ffff880f047cdfd8 ffff880f047cdfd8 [403443.026615] ffffffff8180d020 ffff880f04c4dbe0 ffff880f047cd8b8 000000018108c4a8 [403443.026620] Call Trace: [403443.026625] [] ? __wait_on_buffer+0x30/0x30 [403443.026629] [] schedule+0x3a/0x50 [403443.026633] [] io_schedule+0x8a/0xd0 [403443.026636] [] sleep_on_buffer+0x9/0x10 [403443.026640] [] __wait_on_bit_lock+0x52/0xb0 [403443.026644] [] ? __lock_acquire+0x4cb/0x1ce0 [403443.026647] [] ? __wait_on_buffer+0x30/0x30 [403443.026651] [] out_of_line_wait_on_bit_lock+0x77/0x90 [403443.026655] [] ? autoremove_wake_function+0x40/0x40 [403443.026659] [] __lock_buffer+0x2e/0x30 [403443.026666] [] do_get_write_access+0x49c/0x500 [jbd] [403443.026670] [] ? __find_get_block+0xc6/0x220 [403443.026677] [] ? start_this_handle+0x358/0x450 [jbd] [403443.026681] [] ? __getblk+0x27/0x280 [403443.026696] [] ? ext3_dirty_inode+0x59/0x90 [ext3] [403443.026703] [] journal_get_write_access+0x2b/0x50 [jbd] [403443.026715] [] __ext3_journal_get_write_access+0x28/0x60 [ext3] [403443.026725] [] ext3_reserve_inode_write+0x73/0xa0 [ext3] [403443.026734] [] ext3_mark_inode_dirty+0x3f/0xc0 [ext3] [403443.026741] [] ? journal_start+0x117/0x190 [jbd] [403443.026750] [] ext3_dirty_inode+0x59/0x90 [ext3] [403443.026755] [] __mark_inode_dirty+0x37/0x240 [403443.026760] [] file_update_time+0xcf/0x130 [403443.026763] [] ? __set_page_dirty_buffers+0xc4/0xe0 [403443.026768] [] do_wp_page+0x39c/0x6c0 [403443.026772] [] handle_pte_fault+0x26d/0xa00 [403443.026777] [] ? mem_cgroup_count_vm_event+0x16/0xb0 [403443.026780] [] ? mem_cgroup_count_vm_event+0x7a/0xb0 [403443.026785] [] handle_mm_fault+0x1d8/0x2e0 [403443.026789] [] do_page_fault+0x145/0x500 [403443.026794] [] ? vfsmount_lock_local_unlock+0x1c/0x30 [403443.026799] [] ? mntput_no_expire+0x2b/0xe0 [403443.026803] [] ? mntput+0x1a/0x30 [403443.026808] [] ? fput+0x191/0x270 [403443.026814] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [403443.026818] [] page_fault+0x25/0x30 [403443.026821] 2 locks held by nscd/3039: [403443.026823] #0: (&mm->mmap_sem){++++++}, at: [] do_page_fault+0xe0/0x500 [403443.026830] #1: (jbd_handle){+.+...}, at: [] start_this_handle+0x358/0x450 [jbd] [403563.026391] INFO: task kjournald:1546 blocked for more than 120 seconds. [403563.026395] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [403563.026399] kjournald D 000000010734d6f2 0 1546 2 0x00000000 [403563.026406] ffff88030ae67cd0 0000000000000046 ffff880f00000000 ffffffffa00768b1 [403563.026416] ffff88030b81bd40 ffff88030ae67fd8 ffff88030ae67fd8 ffff88030ae67fd8 [403563.026424] ffffffff8180d020 ffff88030b81bd40 ffff88030ae67ce0 0000000104dd2828 [403563.026432] Call Trace: [403563.026461] [] ? journal_commit_transaction+0x151/0x13d0 [jbd] [403563.026471] [] schedule+0x3a/0x50 [403563.026479] [] journal_commit_transaction+0x156/0x13d0 [jbd] [403563.026488] [] ? try_to_del_timer_sync+0x8d/0x130 [403563.026494] [] ? _raw_spin_unlock_irqrestore+0x3a/0x70 [403563.026501] [] ? trace_hardirqs_on+0xd/0x10 [403563.026507] [] ? __init_waitqueue_head+0x60/0x60 [403563.026512] [] ? try_to_del_timer_sync+0x130/0x130 [403563.026521] [] kjournald+0xeb/0x250 [jbd] [403563.026525] [] ? __init_waitqueue_head+0x60/0x60 [403563.026533] [] ? commit_timeout+0x10/0x10 [jbd] [403563.026537] [] kthread+0xa2/0xb0 [403563.026541] [] ? trace_hardirqs_on+0xd/0x10 [403563.026546] [] kernel_thread_helper+0x4/0x10 [403563.026550] [] ? retint_restore_args+0x13/0x13 [403563.026556] [] ? __init_kthread_worker+0x70/0x70 [403563.026560] [] ? gs_change+0x13/0x13 [403563.026564] no locks held by kjournald/1546. [403563.026575] INFO: task nscd:3039 blocked for more than 120 seconds. [403563.026579] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [403563.026583] nscd D 000000010734d0dc 0 3039 1 0x00000000 [403563.026590] ffff880f047cd8b8 0000000000000046 ffffffff00000000 ffff880f047cd970 [403563.026598] ffff880f04c4dbe0 ffff880f047cdfd8 ffff880f047cdfd8 ffff880f047cdfd8 [403563.026605] ffffffff8180d020 ffff880f04c4dbe0 ffff880f047cd8b8 000000018108c4a8 [403563.026613] Call Trace: [403563.026619] [] ? __wait_on_buffer+0x30/0x30 [403563.026624] [] schedule+0x3a/0x50 [403563.026629] [] io_schedule+0x8a/0xd0 [403563.026632] [] sleep_on_buffer+0x9/0x10 [403563.026637] [] __wait_on_bit_lock+0x52/0xb0 [403563.026641] [] ? __lock_acquire+0x4cb/0x1ce0 [403563.026645] [] ? __wait_on_buffer+0x30/0x30 [403563.026650] [] out_of_line_wait_on_bit_lock+0x77/0x90 [403563.026655] [] ? autoremove_wake_function+0x40/0x40 [403563.026659] [] __lock_buffer+0x2e/0x30 [403563.026667] [] do_get_write_access+0x49c/0x500 [jbd] [403563.026672] [] ? __find_get_block+0xc6/0x220 [403563.026680] [] ? start_this_handle+0x358/0x450 [jbd] [403563.026684] [] ? __getblk+0x27/0x280 [403563.026700] [] ? ext3_dirty_inode+0x59/0x90 [ext3] [403563.026707] [] journal_get_write_access+0x2b/0x50 [jbd] [403563.026722] [] __ext3_journal_get_write_access+0x28/0x60 [ext3] [403563.026733] [] ext3_reserve_inode_write+0x73/0xa0 [ext3] [403563.026743] [] ext3_mark_inode_dirty+0x3f/0xc0 [ext3] [403563.026752] [] ? journal_start+0x117/0x190 [jbd] [403563.026762] [] ext3_dirty_inode+0x59/0x90 [ext3] [403563.026769] [] __mark_inode_dirty+0x37/0x240 [403563.026774] [] file_update_time+0xcf/0x130 [403563.026778] [] ? __set_page_dirty_buffers+0xc4/0xe0 [403563.026784] [] do_wp_page+0x39c/0x6c0 [403563.026789] [] handle_pte_fault+0x26d/0xa00 [403563.026794] [] ? mem_cgroup_count_vm_event+0x16/0xb0 [403563.026798] [] ? mem_cgroup_count_vm_event+0x7a/0xb0 [403563.026803] [] handle_mm_fault+0x1d8/0x2e0 [403563.026808] [] do_page_fault+0x145/0x500 [403563.026815] [] ? vfsmount_lock_local_unlock+0x1c/0x30 [403563.026820] [] ? mntput_no_expire+0x2b/0xe0 [403563.026826] [] ? mntput+0x1a/0x30 [403563.026832] [] ? fput+0x191/0x270 [403563.026839] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [403563.026843] [] page_fault+0x25/0x30 [403563.026847] 2 locks held by nscd/3039: [403563.026850] #0: (&mm->mmap_sem){++++++}, at: [] do_page_fault+0xe0/0x500 [403563.026859] #1: (jbd_handle){+.+...}, at: [] start_this_handle+0x358/0x450 [jbd] [403683.026369] INFO: task kjournald:1546 blocked for more than 120 seconds. [403683.026373] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [403683.026377] kjournald D 000000010734d6f2 0 1546 2 0x00000000 [403683.026383] ffff88030ae67cd0 0000000000000046 ffff880f00000000 ffffffffa00768b1 [403683.026392] ffff88030b81bd40 ffff88030ae67fd8 ffff88030ae67fd8 ffff88030ae67fd8 [403683.026397] ffffffff8180d020 ffff88030b81bd40 ffff88030ae67ce0 0000000104dd2828 [403683.026403] Call Trace: [403683.026432] [] ? journal_commit_transaction+0x151/0x13d0 [jbd] [403683.026441] [] schedule+0x3a/0x50 [403683.026448] [] journal_commit_transaction+0x156/0x13d0 [jbd] [403683.026455] [] ? try_to_del_timer_sync+0x8d/0x130 [403683.026460] [] ? _raw_spin_unlock_irqrestore+0x3a/0x70 [403683.026465] [] ? trace_hardirqs_on+0xd/0x10 [403683.026471] [] ? __init_waitqueue_head+0x60/0x60 [403683.026475] [] ? try_to_del_timer_sync+0x130/0x130 [403683.026483] [] kjournald+0xeb/0x250 [jbd] [403683.026486] [] ? __init_waitqueue_head+0x60/0x60 [403683.026494] [] ? commit_timeout+0x10/0x10 [jbd] [403683.026498] [] kthread+0xa2/0xb0 [403683.026501] [] ? trace_hardirqs_on+0xd/0x10 [403683.026506] [] kernel_thread_helper+0x4/0x10 [403683.026510] [] ? retint_restore_args+0x13/0x13 [403683.026514] [] ? __init_kthread_worker+0x70/0x70 [403683.026518] [] ? gs_change+0x13/0x13 [403683.026521] no locks held by kjournald/1546. [403683.026530] INFO: task nscd:3039 blocked for more than 120 seconds. [403683.026532] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [403683.026535] nscd D 000000010734d0dc 0 3039 1 0x00000000 [403683.026540] ffff880f047cd8b8 0000000000000046 ffffffff00000000 ffff880f047cd970 [403683.026545] ffff880f04c4dbe0 ffff880f047cdfd8 ffff880f047cdfd8 ffff880f047cdfd8 [403683.026551] ffffffff8180d020 ffff880f04c4dbe0 ffff880f047cd8b8 000000018108c4a8 [403683.026556] Call Trace: [403683.026561] [] ? __wait_on_buffer+0x30/0x30 [403683.026565] [] schedule+0x3a/0x50 [403683.026568] [] io_schedule+0x8a/0xd0 [403683.026572] [] sleep_on_buffer+0x9/0x10 [403683.026576] [] __wait_on_bit_lock+0x52/0xb0 [403683.026579] [] ? __lock_acquire+0x4cb/0x1ce0 [403683.026583] [] ? __wait_on_buffer+0x30/0x30 [403683.026587] [] out_of_line_wait_on_bit_lock+0x77/0x90 [403683.026591] [] ? autoremove_wake_function+0x40/0x40 [403683.026594] [] __lock_buffer+0x2e/0x30 [403683.026602] [] do_get_write_access+0x49c/0x500 [jbd] [403683.026606] [] ? __find_get_block+0xc6/0x220 [403683.026612] [] ? start_this_handle+0x358/0x450 [jbd] [403683.026616] [] ? __getblk+0x27/0x280 [403683.026631] [] ? ext3_dirty_inode+0x59/0x90 [ext3] [403683.026638] [] journal_get_write_access+0x2b/0x50 [jbd] [403683.026651] [] __ext3_journal_get_write_access+0x28/0x60 [ext3] [403683.026660] [] ext3_reserve_inode_write+0x73/0xa0 [ext3] [403683.026670] [] ext3_mark_inode_dirty+0x3f/0xc0 [ext3] [403683.026677] [] ? journal_start+0x117/0x190 [jbd] [403683.026686] [] ext3_dirty_inode+0x59/0x90 [ext3] [403683.026691] [] __mark_inode_dirty+0x37/0x240 [403683.026696] [] file_update_time+0xcf/0x130 [403683.026699] [] ? __set_page_dirty_buffers+0xc4/0xe0 [403683.026704] [] do_wp_page+0x39c/0x6c0 [403683.026708] [] handle_pte_fault+0x26d/0xa00 [403683.026713] [] ? mem_cgroup_count_vm_event+0x16/0xb0 [403683.026716] [] ? mem_cgroup_count_vm_event+0x7a/0xb0 [403683.026720] [] handle_mm_fault+0x1d8/0x2e0 [403683.026725] [] do_page_fault+0x145/0x500 [403683.026730] [] ? vfsmount_lock_local_unlock+0x1c/0x30 [403683.026735] [] ? mntput_no_expire+0x2b/0xe0 [403683.026739] [] ? mntput+0x1a/0x30 [403683.026744] [] ? fput+0x191/0x270 [403683.026750] [] ? trace_hardirqs_off_thunk+0x3a/0x3c [403683.026754] [] page_fault+0x25/0x30 [403683.026757] 2 locks held by nscd/3039: [403683.026759] #0: (&mm->mmap_sem){++++++}, at: [] do_page_fault+0xe0/0x500 [403683.026766] #1: (jbd_handle){+.+...}, at: [] start_this_handle+0x358/0x450 [jbd] [403683.026782] INFO: task syslog-ng:4035 blocked for more than 120 seconds. [403683.026785] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [403683.026788] syslog-ng D 000000010735714a 0 4035 4034 0x00000000 [403683.026793] ffff880451e43c88 0000000000000046 ffff880f00000000 ffffffffa0074223 [403683.026799] ffff880704028000 ffff880451e43fd8 ffff880451e43fd8 ffff880451e43fd8 [403683.026805] ffff88030bce6b30 ffff880704028000 ffff880451e43c98 0000000104dd2828 [403683.026811] Call Trace: [403683.026822] [] ? start_this_handle+0x223/0x450 [jbd] [403683.026827] [] schedule+0x3a/0x50 [403683.026834] [] start_this_handle+0x228/0x450 [jbd] [403683.026840] [] ? is_module_address+0x9/0x20 [403683.026844] [] ? static_obj+0x5a/0x70 [403683.026848] [] ? __init_waitqueue_head+0x60/0x60 [403683.026855] [] journal_start+0x117/0x190 [jbd] [403683.026865] [] ? ext3_xattr_get+0xdc/0x290 [ext3] [403683.026876] [] ext3_journal_start_sb+0x31/0x60 [ext3] [403683.026885] [] ext3_dirty_inode+0x35/0x90 [ext3] [403683.026889] [] __mark_inode_dirty+0x37/0x240 [403683.026898] [] ext3_setattr+0x158/0x360 [ext3] [403683.026902] [] notify_change+0x1a2/0x340 [403683.026906] [] chown_common+0x98/0xc0 [403683.026911] [] ? sysret_check+0x2e/0x69 [403683.026915] [] sys_fchown+0x95/0xb0 [403683.026919] [] system_call_fastpath+0x16/0x1b [403683.026922] 1 lock held by syslog-ng/4035: [403683.026924] #0: (&sb->s_type->i_mutex_key#10){+.+.+.}, at: [] chown_common+0x76/0xc0 [409637.741265] md: md2: data-check done. 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