On Sun, Jan 20, 2013 at 12:44 AM, Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > Hi, > > I and some others hit a similiar problem in Linux-Next > (next-20130118), please see [1] and [2]. > > [3] has a interim analyze of my problems. > > After suspecting the problem was caused by TTY-NEXT, it turned out to > be a JBD2 problem finally. > The freezer/pm_test was helpful to hit the issue (Thanks Rafael for the hint!). > > So, the issue has two faces: TTY and JBD2. > [4] gives a list and URLs of the patches I had to apply to have a > clean system again. > > After applying the two TTY patches (without Eric's JBD2-fix!) the > call-trace after freezer/pm_test looked like this; > > [ 433.527986] PM: Syncing filesystems ... done. > [ 433.843761] PM: Preparing system for mem sleep > [ 436.306002] Freezing user space processes ... > [ 456.304956] Freezing of tasks failed after 20.01 seconds (1 tasks > refusing to freeze, wq_busy=0): > [ 456.305060] Cache I/O D ffffffff8180d780 0 2132 1 0x00000004 > [ 456.305065] ffff88007b9dfe18 0000000000000046 ffff88007b9dfdc8 > 0000000300000001 > [ 456.305069] ffff880097e21720 ffff88007b9dffd8 ffff88007b9dffd8 > ffff88007b9dffd8 > [ 456.305072] ffff880119b32e40 ffff880097e21720 ffff88007b9dfe28 > ffff880118077800 > [ 456.305076] Call Trace: > [ 456.305085] [<ffffffff816b7469>] schedule+0x29/0x70 > [ 456.305089] [<ffffffff8129067d>] jbd2_log_wait_commit+0xcd/0x1a0 > [ 456.305094] [<ffffffff8107eac0>] ? add_wait_queue+0x60/0x60 > [ 456.305098] [<ffffffff812307a5>] ext4_sync_file+0x205/0x380 > [ 456.305103] [<ffffffff811c43ad>] do_fsync+0x5d/0x90 > [ 456.305108] [<ffffffff8119442b>] ? sys_write+0x6b/0xa0 > [ 456.305111] [<ffffffff811c4790>] sys_fsync+0x10/0x20 > [ 456.305114] [<ffffffff816c0edd>] system_call_fastpath+0x1a/0x1f > [ 456.305122] > [ 456.305124] Restarting tasks ... done. > [ 456.315056] video LNXVIDEO:00: Restoring backlight state > > After applying Eric's patch [5], I could not hit the call-trace again. > NOTE: The patch is from December 2012 and is not shipped in latest Linux-Next. > > The attached testcase script was helpful to force the call-trace. > I have run 50 loops of it w/o an issue! > > Feel free to add a Reported-by/Tested-by. > ( The issue kept me busy for the last days. ) > > Regards, > - Sedat - > > [1] http://marc.info/?t=135283664600002&r=1&w=2 > [2] http://marc.info/?t=135862023700004&r=1&w=2 > [3] http://marc.info/?l=linux-kernel&m=135862010419101&w=2 > [4] http://marc.info/?l=linux-next&m=135863550923093&w=2 > [5] http://patchwork.ozlabs.org/patch/207237/ Hi all, this is really ugly... I could cry! GRRR, I have hit the original issue again while running my testcase script! [ 363.831226] PM: Syncing filesystems ... done. [ 363.988855] PM: Preparing system for mem sleep [ 369.032965] Freezing user space processes ... (elapsed 0.11 seconds) done. [ 369.145792] Freezing remaining freezable tasks ... [ 389.137643] Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): [ 389.137760] jbd2/loop0-8 D ffffffff8180d780 0 295 2 0x00000000 [ 389.137769] ffff8801181dfb68 0000000000000046 ffff880117de5c80 0000000000000001 [ 389.137778] ffff880117de5c80 ffff8801181dffd8 ffff8801181dffd8 ffff8801181dffd8 [ 389.137784] ffffffff81c15440 ffff880117de5c80 ffff8801181dfb68 ffff88011fa14738 [ 389.137791] Call Trace: [ 389.137810] [<ffffffff811c6830>] ? __wait_on_buffer+0x30/0x30 [ 389.137819] [<ffffffff816b7479>] schedule+0x29/0x70 [ 389.137825] [<ffffffff816b754f>] io_schedule+0x8f/0xd0 [ 389.137832] [<ffffffff811c683e>] sleep_on_buffer+0xe/0x20 [ 389.137842] [<ffffffff816b5d4f>] __wait_on_bit+0x5f/0x90 [ 389.137849] [<ffffffff811c5ef1>] ? submit_bh+0x121/0x1e0 [ 389.137856] [<ffffffff811c6830>] ? __wait_on_buffer+0x30/0x30 [ 389.137864] [<ffffffff816b5dfc>] out_of_line_wait_on_bit+0x7c/0x90 [ 389.137873] [<ffffffff8107eb00>] ? autoremove_wake_function+0x40/0x40 [ 389.137879] [<ffffffff811c682e>] __wait_on_buffer+0x2e/0x30 [ 389.137891] [<ffffffff8128c02c>] jbd2_journal_commit_transaction+0x18cc/0x1d60 [ 389.137899] [<ffffffff816b860e>] ? _raw_spin_lock_irqsave+0x2e/0x40 [ 389.137908] [<ffffffff81069fbf>] ? try_to_del_timer_sync+0x4f/0x70 [ 389.137915] [<ffffffff81290836>] kjournald2+0xd6/0x3e0 [ 389.137921] [<ffffffff8107eac0>] ? add_wait_queue+0x60/0x60 [ 389.137926] [<ffffffff81290760>] ? commit_timeout+0x10/0x10 [ 389.137932] [<ffffffff8107ded0>] kthread+0xc0/0xd0 [ 389.137939] [<ffffffff8107de10>] ? flush_kthread_worker+0xb0/0xb0 [ 389.137946] [<ffffffff816c0e2c>] ret_from_fork+0x7c/0xb0 [ 389.137951] [<ffffffff8107de10>] ? flush_kthread_worker+0xb0/0xb0 [ 389.138017] [ 389.138021] Restarting kernel threads ... done. [ 389.138173] Restarting tasks ... done. [ 389.147980] video LNXVIDEO:00: Restoring backlight state I suspect there are still issues in JBD2 (BTW I run here EXT4FS). [ 389.137643] Freezing of tasks failed after 20.01 seconds (1 tasks refusing to freeze, wq_busy=0): [ 389.137760] jbd2/loop0-8 D ffffffff8180d780 0 295 2 0x00000000 Have a good night, /me -> watching TV! - Sedat - -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
