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Date: Mon, 21 Sep 2009 09:41:46 +0200 From: Mike Galbraith <efault@....de> To: Arjan van de Ven <arjan@...radead.org> Cc: Jan Kara <jack@...e.cz>, Jiri Kosina <jkosina@...e.cz>, Ulrich Lukas <stellplatz-nr.13a@...enparkplatz.de>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Poor desktop responsiveness with background I/O-operations On Mon, 2009-09-21 at 09:33 +0200, Arjan van de Ven wrote: > On Mon, 21 Sep 2009 09:25:08 +0200 > Mike Galbraith <efault@....de> wrote: > > I still occasionally see some largish numbers though, and suspect that > > depends on how much cache was evicted. > > if you run latencytop it'll at least tell you what kind of operating > was going on that hit the delay... One of the really bad ones for evolution is below. It was so bad that I had _plenty_ of time to get to a GUI free shell, and poke SysRq-W before killing the darn dd. [ 5112.427012] SysRq : Show Blocked State [ 5112.430995] task PC stack pid father [ 5112.430995] kjournald D 0000000000000002 0 1230 2 0x00000000 [ 5112.430995] ffff8800378d7c50 0000000000000046 0000000000000000 ffff8800a5ed53b0 [ 5112.430995] ffff8800bd2c0000 ffff8800378d7fd8 000000000000dd38 0000000000013480 [ 5112.430995] 0000000000004000 0000000000013480 ffff8800378d7bf0 00001000810e0c0a [ 5112.430995] Call Trace: [ 5112.430995] [<ffffffff812cacb4>] io_schedule+0x80/0xc6 [ 5112.430995] [<ffffffff8110df99>] sync_buffer+0x40/0x44 [ 5112.430995] [<ffffffff812cb373>] __wait_on_bit+0x4c/0x7e [ 5112.430995] [<ffffffff8110df59>] ? sync_buffer+0x0/0x44 [ 5112.430995] [<ffffffff8110df59>] ? sync_buffer+0x0/0x44 [ 5112.430995] [<ffffffff812cb414>] out_of_line_wait_on_bit+0x6f/0x7c [ 5112.430995] [<ffffffff81065e6f>] ? wake_bit_function+0x0/0x2f [ 5112.430995] [<ffffffff8110deff>] __wait_on_buffer+0x24/0x26 [ 5112.430995] [<ffffffffa0077e91>] journal_commit_transaction+0xca4/0x138b [jbd] [ 5112.430995] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.430995] [<ffffffffa007ba02>] kjournald+0x168/0x397 [jbd] [ 5112.430995] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.430995] [<ffffffffa007b89a>] ? kjournald+0x0/0x397 [jbd] [ 5112.430995] [<ffffffff81065acb>] kthread+0x82/0x8a [ 5112.625071] [<ffffffff8100ccca>] child_rip+0xa/0x20 [ 5112.625071] [<ffffffff8100c669>] ? restore_args+0x0/0x30 [ 5112.625071] [<ffffffff81065a49>] ? kthread+0x0/0x8a [ 5112.625071] [<ffffffff8100ccc0>] ? child_rip+0x0/0x20 [ 5112.625071] flush-8:16 D ffff8800bd2097f0 0 1236 2 0x00000000 [ 5112.625071] ffff8800bd209790 0000000000000046 0000000000000000 ffffffff810beb58 [ 5112.625071] ffff8800bd209740 ffff8800bd209fd8 000000000000dd38 0000000000013480 [ 5112.625071] 0000000000004000 0000000000013480 0000000001080001 0000000000000080 [ 5112.625071] Call Trace: [ 5112.625071] [<ffffffff810beb58>] ? get_page_from_freelist+0x33d/0x4a6 [ 5112.625071] [<ffffffff81174cb6>] ? cfq_may_queue+0x60/0xe1 [ 5112.625071] [<ffffffff812cacb4>] io_schedule+0x80/0xc6 [ 5112.625071] [<ffffffff81169184>] get_request_wait+0xf3/0x18f [ 5112.625071] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.625071] [<ffffffff8115f142>] ? elv_merge+0x37/0x19d [ 5112.625071] [<ffffffff8116954d>] __make_request+0x32d/0x45b [ 5112.625071] [<ffffffff811678ae>] generic_make_request+0x339/0x38b [ 5112.625071] [<ffffffff811679d4>] submit_bio+0xd4/0xdd [ 5112.625071] [<ffffffff8110ccfc>] submit_bh+0x106/0x129 [ 5112.625071] [<ffffffff8110f7a4>] __block_write_full_page+0x1eb/0x2d1 [ 5112.625071] [<ffffffff8110e197>] ? end_buffer_async_write+0x0/0x13f [ 5112.625071] [<ffffffff8110f94f>] block_write_full_page_endio+0xc5/0xca [ 5112.625071] [<ffffffff8110f969>] block_write_full_page+0x15/0x17 [ 5112.625071] [<ffffffffa0095e1f>] ext3_writeback_writepage+0x71/0x142 [ext3] [ 5112.625071] [<ffffffff810bf647>] __writepage+0x17/0x34 [ 5112.625071] [<ffffffff810bfd9f>] write_cache_pages+0x250/0x393 [ 5112.625071] [<ffffffff810bf630>] ? __writepage+0x0/0x34 [ 5112.625071] [<ffffffff810bff06>] generic_writepages+0x24/0x2a [ 5112.625071] [<ffffffff810bff34>] do_writepages+0x28/0x2a [ 5112.625071] [<ffffffff81106b94>] writeback_single_inode+0x181/0x395 [ 5112.625071] [<ffffffff811077fc>] writeback_inodes_wb+0x341/0x42f [ 5112.625071] [<ffffffff81107a2b>] wb_writeback+0x141/0x194 [ 5112.625071] [<ffffffff81095031>] ? call_rcu_sched+0x15/0x17 [ 5112.625071] [<ffffffff81095041>] ? call_rcu+0xe/0x10 [ 5112.625071] [<ffffffff81107bb9>] wb_do_writeback+0x7a/0x16b [ 5112.625071] [<ffffffff81107ce9>] bdi_writeback_task+0x3f/0xad [ 5112.625071] [<ffffffff810cca5d>] ? bdi_start_fn+0x0/0xd7 [ 5112.625071] [<ffffffff810ccad3>] bdi_start_fn+0x76/0xd7 [ 5112.625071] [<ffffffff810cca5d>] ? bdi_start_fn+0x0/0xd7 [ 5112.625071] [<ffffffff81065acb>] kthread+0x82/0x8a [ 5112.625071] [<ffffffff8100ccca>] child_rip+0xa/0x20 [ 5112.625071] [<ffffffff8100c669>] ? restore_args+0x0/0x30 [ 5112.625071] [<ffffffff81065a49>] ? kthread+0x0/0x8a [ 5112.625071] [<ffffffff8100ccc0>] ? child_rip+0x0/0x20 [ 5112.625071] console-kit-d D ffff8800b788c480 0 2963 1 0x00000000 [ 5112.625071] ffff8800bc59f6b8 0000000000000082 0000000000000000 ffffffffa0076655 [ 5112.625071] ffff8800bc59f628 ffff8800bc59ffd8 000000000000dd38 0000000000013480 [ 5112.625071] 0000000000004000 0000000000013480 ffff8800bd2f3c00 0000000000000000 [ 5112.625071] Call Trace: [ 5112.625071] [<ffffffffa0076655>] ? do_get_write_access+0x443/0x48b [jbd] [ 5112.625071] [<ffffffffa0076490>] do_get_write_access+0x27e/0x48b [jbd] [ 5112.625071] [<ffffffff81065e6f>] ? wake_bit_function+0x0/0x2f [ 5112.625071] [<ffffffffa00766c4>] journal_get_write_access+0x27/0x38 [jbd] [ 5112.625071] [<ffffffffa00a15fb>] __ext3_journal_get_write_access+0x24/0x4d [ext3] [ 5112.625071] [<ffffffffa0092901>] ext3_new_blocks+0x333/0x669 [ext3] [ 5112.625071] [<ffffffffa0096654>] ext3_get_blocks_handle+0x3ec/0x92d [ext3] [ 5112.625071] [<ffffffff8110c866>] ? alloc_buffer_head+0x1e/0x51 [ 5112.625071] [<ffffffffa0096c3a>] ext3_get_block+0xa5/0xe3 [ext3] [ 5112.625071] [<ffffffff8110ec0a>] __block_prepare_write+0x1f0/0x3d2 [ 5112.625071] [<ffffffffa0076e49>] ? start_this_handle+0x37d/0x474 [jbd] [ 5112.625071] [<ffffffffa0096b95>] ? ext3_get_block+0x0/0xe3 [ext3] [ 5112.625071] [<ffffffffa007709a>] ? journal_start+0x60/0xca [jbd] [ 5112.625071] [<ffffffff8110ef7c>] block_write_begin+0x85/0xd5 [ 5112.625071] [<ffffffffa0098130>] ext3_write_begin+0xf0/0x1e7 [ext3] [ 5112.625071] [<ffffffffa0096b95>] ? ext3_get_block+0x0/0xe3 [ext3] [ 5112.625071] [<ffffffff810ba9e8>] generic_file_buffered_write+0x11f/0x277 [ 5112.625071] [<ffffffff810bafe1>] __generic_file_aio_write+0x351/0x385 [ 5112.625071] [<ffffffff810bb07b>] generic_file_aio_write+0x66/0xad [ 5112.625071] [<ffffffff810e75b4>] do_sync_write+0xec/0x132 [ 5112.625071] [<ffffffff810c176a>] ? lru_cache_add_lru+0x2b/0x2d [ 5112.625071] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.625071] [<ffffffff8117c94f>] ? __up_read+0x9e/0xa7 [ 5112.625071] [<ffffffff81151f8c>] ? security_file_permission+0x16/0x18 [ 5112.625071] [<ffffffff810e8053>] vfs_write+0xb3/0x16f [ 5112.625071] [<ffffffff810e81dd>] sys_write+0x4c/0x74 [ 5112.625071] [<ffffffff8100bc1b>] system_call_fastpath+0x16/0x1b [ 5112.625071] dd D ffff8800b788c480 0 8587 6686 0x00000000 [ 5112.625071] ffff8800a5e2faa8 0000000000000086 0000000000000000 ffffffff812cab8c [ 5112.625071] ffff8800a5e2fbe0 ffff8800a5e2ffd8 000000000000dd38 0000000000013480 [ 5112.625071] 0000000000004000 0000000000013480 ffff8800a5e2fa28 ffffffff810b9b1c [ 5112.625071] Call Trace: [ 5112.625071] [<ffffffff812cab8c>] ? thread_return+0x60/0x108 [ 5112.625071] [<ffffffff810b9b1c>] ? find_get_page+0x28/0x89 [ 5112.625071] [<ffffffffa0076490>] do_get_write_access+0x27e/0x48b [jbd] [ 5112.625071] [<ffffffff81065e6f>] ? wake_bit_function+0x0/0x2f [ 5112.625071] [<ffffffffa00766c4>] journal_get_write_access+0x27/0x38 [jbd] [ 5112.625071] [<ffffffffa00a15fb>] __ext3_journal_get_write_access+0x24/0x4d [ext3] [ 5112.625071] [<ffffffffa00953f5>] ext3_reserve_inode_write+0x44/0x80 [ext3] [ 5112.625071] [<ffffffffa0095460>] ext3_mark_inode_dirty+0x2f/0x4c [ext3] [ 5112.625071] [<ffffffffa0095605>] ext3_dirty_inode+0xab/0xc2 [ext3] [ 5112.625071] [<ffffffff81107392>] __mark_inode_dirty+0x34/0x15d [ 5112.625071] [<ffffffff810fc6af>] file_update_time+0xbe/0x102 [ 5112.625071] [<ffffffff810baef7>] __generic_file_aio_write+0x267/0x385 [ 5112.625071] [<ffffffff810b8427>] ? perf_swcounter_ctx_event+0x16c/0x1c6 [ 5112.625071] [<ffffffff810bb07b>] generic_file_aio_write+0x66/0xad [ 5112.625071] [<ffffffff810e75b4>] do_sync_write+0xec/0x132 [ 5112.625071] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.625071] [<ffffffff8117ffa0>] ? __clear_user+0x17/0x55 [ 5112.625071] [<ffffffff81151f8c>] ? security_file_permission+0x16/0x18 [ 5112.625071] [<ffffffff810e8053>] vfs_write+0xb3/0x16f [ 5112.625071] [<ffffffff810e81dd>] sys_write+0x4c/0x74 [ 5112.625071] [<ffffffff8100bc1b>] system_call_fastpath+0x16/0x1b [ 5112.625071] perf D ffff8800b788c480 0 8588 6686 0x00000000 [ 5112.625071] ffff8800a5f115d8 0000000000000082 0000000000000000 000004a57bce3b78 [ 5112.625071] ffff8800be035f40 ffff8800a5f11fd8 000000000000dd38 0000000000013480 [ 5112.625071] 0000000000004000 0000000000013480 ffff8800a5f11558 ffffffff810b9b1c [ 5112.625071] Call Trace: [ 5112.625071] [<ffffffff810b9b1c>] ? find_get_page+0x28/0x89 [ 5112.625071] [<ffffffffa0076490>] do_get_write_access+0x27e/0x48b [jbd] [ 5112.625071] [<ffffffff81065e6f>] ? wake_bit_function+0x0/0x2f [ 5112.625071] [<ffffffffa00766c4>] journal_get_write_access+0x27/0x38 [jbd] [ 5112.625071] [<ffffffffa00a15fb>] __ext3_journal_get_write_access+0x24/0x4d [ext3] [ 5112.625071] [<ffffffffa00953f5>] ext3_reserve_inode_write+0x44/0x80 [ext3] [ 5112.625071] [<ffffffffa0095460>] ext3_mark_inode_dirty+0x2f/0x4c [ext3] [ 5112.625071] [<ffffffffa0095605>] ext3_dirty_inode+0xab/0xc2 [ext3] [ 5112.625071] [<ffffffff81107392>] __mark_inode_dirty+0x34/0x15d [ 5112.625071] [<ffffffffa0092672>] ext3_new_blocks+0xa4/0x669 [ext3] [ 5112.625071] [<ffffffff81110195>] ? __bread+0x13/0x92 [ 5112.625071] [<ffffffffa00959c4>] ? ext3_get_branch+0x7b/0xee [ext3] [ 5112.625071] [<ffffffffa0096654>] ext3_get_blocks_handle+0x3ec/0x92d [ext3] [ 5112.625071] [<ffffffffa0096c3a>] ext3_get_block+0xa5/0xe3 [ext3] [ 5112.625071] [<ffffffff8110ec0a>] __block_prepare_write+0x1f0/0x3d2 [ 5112.625071] [<ffffffffa0076e49>] ? start_this_handle+0x37d/0x474 [jbd] [ 5112.625071] [<ffffffffa0096b95>] ? ext3_get_block+0x0/0xe3 [ext3] [ 5112.625071] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.625071] [<ffffffff8110ef7c>] block_write_begin+0x85/0xd5 [ 5112.625071] [<ffffffffa0098130>] ext3_write_begin+0xf0/0x1e7 [ext3] [ 5112.625071] [<ffffffffa0096b95>] ? ext3_get_block+0x0/0xe3 [ext3] [ 5112.625071] [<ffffffff810ba9e8>] generic_file_buffered_write+0x11f/0x277 [ 5112.625071] [<ffffffff810bafe1>] __generic_file_aio_write+0x351/0x385 [ 5112.625071] [<ffffffff8100c669>] ? restore_args+0x0/0x30 [ 5112.625071] [<ffffffff812cb922>] ? mutex_lock+0x1c/0x3b [ 5112.625071] [<ffffffff810bb07b>] generic_file_aio_write+0x66/0xad [ 5112.625071] [<ffffffff810e75b4>] do_sync_write+0xec/0x132 [ 5112.625071] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.625071] [<ffffffff812cab6a>] ? thread_return+0x3e/0x108 [ 5112.625071] [<ffffffff81151f8c>] ? security_file_permission+0x16/0x18 [ 5112.625071] [<ffffffff810e8053>] vfs_write+0xb3/0x16f [ 5112.625071] [<ffffffff810e81dd>] sys_write+0x4c/0x74 [ 5112.625071] [<ffffffff8100bc1b>] system_call_fastpath+0x16/0x1b [ 5112.625071] evolution.bin D 0000000000000082 0 8638 6627 0x00000000 [ 5112.625071] ffff880099339c08 0000000000000086 0000000000000000 ffffffff811157a6 [ 5112.625071] ffffffffa0096b95 ffff880099339fd8 000000000000dd38 0000000000013480 [ 5112.625071] 0000000000004000 0000000000013480 ffffea0001c5ae08 00000000009ff29b [ 5112.625071] Call Trace: [ 5112.625071] [<ffffffff811157a6>] ? mpage_readpages+0x10a/0x120 [ 5112.625071] [<ffffffffa0096b95>] ? ext3_get_block+0x0/0xe3 [ext3] [ 5112.625071] [<ffffffff812cacb4>] io_schedule+0x80/0xc6 [ 5112.625071] [<ffffffff810b9d22>] sync_page+0x46/0x4a [ 5112.625071] [<ffffffff810b9d34>] sync_page_killable+0xe/0x35 [ 5112.625071] [<ffffffff812cb263>] __wait_on_bit_lock+0x4a/0x92 [ 5112.625071] [<ffffffff810b9d26>] ? sync_page_killable+0x0/0x35 [ 5112.625071] [<ffffffff810b9c54>] __lock_page_killable+0x68/0x6f [ 5112.625071] [<ffffffff81065e6f>] ? wake_bit_function+0x0/0x2f [ 5112.625071] [<ffffffff810bb480>] generic_file_aio_read+0x3be/0x5bb [ 5112.625071] [<ffffffff810e76e6>] do_sync_read+0xec/0x132 [ 5112.625071] [<ffffffff810c176a>] ? lru_cache_add_lru+0x2b/0x2d [ 5112.625071] [<ffffffff81065e32>] ? autoremove_wake_function+0x0/0x3d [ 5112.625071] [<ffffffff81151f8c>] ? security_file_permission+0x16/0x18 [ 5112.625071] [<ffffffff810e82b5>] vfs_read+0xb0/0x16c [ 5112.625071] [<ffffffff810e843f>] sys_read+0x4c/0x75 [ 5112.625071] [<ffffffff8100bc1b>] system_call_fastpath+0x16/0x1b [ 5112.625071] hal-acl-tool D ffff8800b788c480 0 8675 2964 0x00000000 [ 5112.625071] ffff880037b3db78 0000000000000082 ffff88007af907e0 ffff880062b7f7e0 [ 5112.625071] ffff880037b3dac8 ffff880037b3dfd8 000000000000dd38 0000000000013480 [ 5112.625071] 0000000000004000 0000000000013480 ffff880037b3db18 ffffffff8110d414 [ 5112.625071] Call Trace: [ 5112.625071] [<ffffffff8110d414>] ? __getblk+0x2d/0x2ae [ 5112.625071] [<ffffffffa0076490>] do_get_write_access+0x27e/0x48b [jbd] [ 5112.625071] [<ffffffff81065e6f>] ? wake_bit_function+0x0/0x2f [ 5112.625071] [<ffffffffa00766c4>] journal_get_write_access+0x27/0x38 [jbd] [ 5112.625071] [<ffffffffa00a15fb>] __ext3_journal_get_write_access+0x24/0x4d [ext3] [ 5112.625071] [<ffffffffa0093ef8>] ext3_new_inode+0x4d4/0x96d [ext3] [ 5112.625071] [<ffffffffa009afca>] ext3_create+0x76/0xf3 [ext3] [ 5112.625071] [<ffffffff810f2be9>] vfs_create+0xa2/0x117 [ 5112.625071] [<ffffffff810f50fb>] do_filp_open+0x327/0xa39 [ 5112.625071] [<ffffffff810f2e69>] ? getname+0x31/0x1b3 [ 5112.625071] [<ffffffff810e513e>] do_sys_open+0x62/0x109 [ 5112.625071] [<ffffffff810e5218>] sys_open+0x20/0x22 [ 5112.625071] [<ffffffff8100bc1b>] system_call_fastpath+0x16/0x1b -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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