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Date: Thu, 2 Oct 2008 21:23:55 -0700 From: Arjan van de Ven <arjan@...radead.org> To: Arjan van de Ven <arjan@...radead.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, Jens Axboe <jens.axboe@...cle.com>, linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk> Subject: Re: [PATCH] Give kjournald a IOPRIO_CLASS_RT io priority On Thu, 2 Oct 2008 21:01:17 -0700 Arjan van de Ven <arjan@...radead.org> wrote: > > _ > > > > perhaps for varying values of "1". > caught a few, a few were over 3 1/2 seconds in stall time (specifically I know this for the last one) (I've stripped out the ? entries to keep them reasonable) [ 410.168277] WARNING: at kernel/sched.c:5652 io_schedule+0x77/0xb0() [ 410.168347] Pid: 699, comm: kjournald Not tainted 2.6.27-rc8-tip #50 [ 410.168366] [<c042ee64>] warn_on_slowpath+0x41/0x65 [ 410.168414] [<c070ec83>] io_schedule+0x77/0xb0 [ 410.168421] [<c04abc72>] sync_buffer+0x33/0x37 [ 410.168429] [<c070f123>] __wait_on_bit+0x36/0x5d [ 410.168445] [<c070f1f5>] out_of_line_wait_on_bit+0xab/0xb3 [ 410.168471] [<c04abbd1>] __wait_on_buffer+0x19/0x1c [ 410.168478] [<c04de796>] journal_commit_transaction+0x484/0xcb2 [ 410.168519] [<c04e14ae>] kjournald+0xc7/0x1ea [ 410.168544] [<c043fb87>] kthread+0x3b/0x61 [ 410.168559] [<c040499f>] kernel_thread_helper+0x7/0x10 [ 410.168567] ======================= [ 410.168572] ---[ end trace de523043f88bd9a7 ]--- [ 451.605034] ------------[ cut here ]------------ [ 451.605041] WARNING: at kernel/sched.c:5652 io_schedule+0x77/0xb0() [ 451.605114] Pid: 699, comm: kjournald Tainted: G W 2.6.27-rc8-tip #50 [ 451.605133] [<c042ee64>] warn_on_slowpath+0x41/0x65 [ 451.605182] [<c070ec83>] io_schedule+0x77/0xb0 [ 451.605189] [<c04abc72>] sync_buffer+0x33/0x37 [ 451.605198] [<c070f123>] __wait_on_bit+0x36/0x5d [ 451.605213] [<c070f1f5>] out_of_line_wait_on_bit+0xab/0xb3 [ 451.605240] [<c04abbd1>] __wait_on_buffer+0x19/0x1c [ 451.605248] [<c04de796>] journal_commit_transaction+0x484/0xcb2 [ 451.605300] [<c04e14ae>] kjournald+0xc7/0x1ea [ 451.605324] [<c043fb87>] kthread+0x3b/0x61 [ 451.605339] [<c040499f>] kernel_thread_helper+0x7/0x10 [ 451.605348] ======================= [ 451.605353] ---[ end trace de523043f88bd9a7 ]--- [ 514.780993] ------------[ cut here ]------------ [ 514.781001] WARNING: at kernel/sched.c:5652 io_schedule+0x77/0xb0() [ 514.781074] Pid: 699, comm: kjournald Tainted: G W 2.6.27-rc8-tip #50 [ 514.781092] [<c042ee64>] warn_on_slowpath+0x41/0x65 [ 514.781152] [<c070ec83>] io_schedule+0x77/0xb0 [ 514.781159] [<c04abc72>] sync_buffer+0x33/0x37 [ 514.781167] [<c070f010>] __wait_on_bit_lock+0x34/0x5e [ 514.781183] [<c070f0e5>] out_of_line_wait_on_bit_lock+0xab/0xb3 [ 514.781210] [<c04abfa1>] __lock_buffer+0x24/0x2a [ 514.781218] [<c04de597>] journal_commit_transaction+0x285/0xcb2 [ 514.781288] [<c04e14ae>] kjournald+0xc7/0x1ea [ 514.781313] [<c043fb87>] kthread+0x3b/0x61 [ 514.781334] [<c040499f>] kernel_thread_helper+0x7/0x10 [ 514.781345] ======================= [ 514.781352] ---[ end trace de523043f88bd9a7 ]--- [ 517.064300] ------------[ cut here ]------------ [ 517.064379] Pid: 699, comm: kjournald Tainted: G W 2.6.27-rc8-tip #50 [ 517.064398] [<c042ee64>] warn_on_slowpath+0x41/0x65 [ 517.064474] [<c070ec83>] io_schedule+0x77/0xb0 [ 517.064481] [<c04abc72>] sync_buffer+0x33/0x37 [ 517.064490] [<c070f123>] __wait_on_bit+0x36/0x5d [ 517.064505] [<c070f1f5>] out_of_line_wait_on_bit+0xab/0xb3 [ 517.064530] [<c04abbd1>] __wait_on_buffer+0x19/0x1c [ 517.064538] [<c04de796>] journal_commit_transaction+0x484/0xcb2 [ 517.064579] [<c04e14ae>] kjournald+0xc7/0x1ea [ 517.064603] [<c043fb87>] kthread+0x3b/0x61 [ 517.064618] [<c040499f>] kernel_thread_helper+0x7/0x10 [ 517.064626] ======================= [ 517.064631] ---[ end trace de523043f88bd9a7 ]--- [ 517.067487] ------------[ cut here ]------------ [ 517.067493] WARNING: at kernel/sched.c:5652 io_schedule+0x77/0xb0() [ 517.067556] Pid: 4320, comm: claws-mail Tainted: G W 2.6.27-rc8-tip #50 [ 517.067572] [<c042ee64>] warn_on_slowpath+0x41/0x65 [ 517.067652] [<c070ec83>] io_schedule+0x77/0xb0 [ 517.067659] [<c04abc72>] sync_buffer+0x33/0x37 [ 517.067666] [<c070f010>] __wait_on_bit_lock+0x34/0x5e [ 517.067682] [<c070f0e5>] out_of_line_wait_on_bit_lock+0xab/0xb3 [ 517.067707] [<c04abfa1>] __lock_buffer+0x24/0x2a [ 517.067715] [<c04dd7fc>] do_get_write_access+0x64/0x3b1 [ 517.067743] [<c04ddb64>] journal_get_write_access+0x1b/0x2a [ 517.067752] [<c04da374>] __ext3_journal_get_write_access+0x19/0x3c [ 517.067761] [<c04cf672>] ext3_reserve_inode_write+0x34/0x68 [ 517.067769] [<c04cf6d5>] ext3_mark_inode_dirty+0x2f/0x46 [ 517.067777] [<c04cf7f7>] ext3_dirty_inode+0x53/0x67 [ 517.067784] [<c04a7bed>] __mark_inode_dirty+0x29/0x144 [ 517.067794] [<c049e60f>] file_update_time+0x80/0xa9 [ 517.067803] [<c046b66c>] __generic_file_aio_write_nolock+0x2f0/0x41b [ 517.067842] [<c046bf0d>] generic_file_aio_write+0x5a/0xb7 [ 517.067850] [<c04cdc65>] ext3_file_write+0x1a/0x89 [ 517.067858] [<c048da41>] do_sync_write+0xab/0xe9 [ 517.067896] [<c048e302>] vfs_write+0x8a/0x12e [ 517.067903] [<c048e43f>] sys_write+0x3b/0x60 [ 517.067910] [<c0403b0b>] sysenter_do_call+0x12/0x2f [ 517.067919] ======================= [ 517.067923] ---[ end trace de523043f88bd9a7 ]--- -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- 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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