On Thu, Feb 18, 2016 at 01:35:24PM +0100, Christian Rohmann wrote: > > > On 02/14/2016 11:42 PM, Roman Mamedov wrote: > > FWIW I had a persistently repeating deadlock on 4.1 and 4.3, but > > after upgrade to 4.4 it no longer happens. > > > Apparently also with 4.4 there is some sort of blocking happening ... > just at 38580:
OK, what does 'sysrq-w' say? Thanks, -liubo > > ---- cut ---- > > [Wed Feb 17 16:43:48 2016] INFO: task btrfs-cleaner:38580 blocked for > more than 120 seconds. > [Wed Feb 17 16:43:48 2016] Not tainted 4.4.0-customkernel #1 > [Wed Feb 17 16:43:48 2016] "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [Wed Feb 17 16:43:48 2016] btrfs-cleaner D ffff882c27295dc0 0 > 38580 2 0x00000000 > [Wed Feb 17 16:43:48 2016] ffff882c16fa6480 ffff88161a980280 > ffff882a3d744000 ffff882a3d743df8 > [Wed Feb 17 16:43:48 2016] ffff8815fead7104 ffff882c16fa6480 > 00000000ffffffff ffff8815fead7108 > [Wed Feb 17 16:43:48 2016] ffffffff81559a31 ffff8815fead7100 > ffffffff81559cba ffffffff8155b5a0 > [Wed Feb 17 16:43:48 2016] Call Trace: > [Wed Feb 17 16:43:48 2016] [<ffffffff81559a31>] ? schedule+0x31/0x80 > [Wed Feb 17 16:43:48 2016] [<ffffffff81559cba>] ? > schedule_preempt_disabled+0xa/0x10 > [Wed Feb 17 16:43:48 2016] [<ffffffff8155b5a0>] ? > __mutex_lock_slowpath+0x90/0x110 > [Wed Feb 17 16:43:48 2016] [<ffffffff8155b63b>] ? mutex_lock+0x1b/0x30 > [Wed Feb 17 16:43:48 2016] [<ffffffffa01bf51e>] ? > btrfs_delete_unused_bgs+0xee/0x3f0 [btrfs] > [Wed Feb 17 16:43:48 2016] [<ffffffff81559396>] ? __schedule+0x286/0x8f0 > [Wed Feb 17 16:43:48 2016] [<ffffffffa01c6ff7>] ? > cleaner_kthread+0x1a7/0x200 [btrfs] > [Wed Feb 17 16:43:48 2016] [<ffffffffa01c6e50>] ? > check_leaf+0x340/0x340 [btrfs] > [Wed Feb 17 16:43:48 2016] [<ffffffff8108df6f>] ? kthread+0xcf/0xf0 > [Wed Feb 17 16:43:48 2016] [<ffffffff8108dea0>] ? kthread_park+0x50/0x50 > [Wed Feb 17 16:43:48 2016] [<ffffffff8155d74f>] ? ret_from_fork+0x3f/0x70 > [Wed Feb 17 16:43:48 2016] [<ffffffff8108dea0>] ? kthread_park+0x50/0x50 > > [Wed Feb 17 17:23:48 2016] INFO: task btrfs-cleaner:38580 blocked for > more than 120 seconds. > [Wed Feb 17 17:23:48 2016] Not tainted 4.4.0-customkernel #1 > [Wed Feb 17 17:23:48 2016] "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [Wed Feb 17 17:23:48 2016] btrfs-cleaner D ffff881627a35dc0 0 > 38580 2 0x00000000 > [Wed Feb 17 17:23:48 2016] ffff882c16fa6480 ffff88161a956f00 > ffff882a3d744000 ffff882a3d743df8 > [Wed Feb 17 17:23:48 2016] ffff8815fead7104 ffff882c16fa6480 > 00000000ffffffff ffff8815fead7108 > [Wed Feb 17 17:23:48 2016] ffffffff81559a31 ffff8815fead7100 > ffffffff81559cba ffffffff8155b5a0 > [Wed Feb 17 17:23:48 2016] Call Trace: > [Wed Feb 17 17:23:48 2016] [<ffffffff81559a31>] ? schedule+0x31/0x80 > [Wed Feb 17 17:23:48 2016] [<ffffffff81559cba>] ? > schedule_preempt_disabled+0xa/0x10 > [Wed Feb 17 17:23:48 2016] [<ffffffff8155b5a0>] ? > __mutex_lock_slowpath+0x90/0x110 > [Wed Feb 17 17:23:48 2016] [<ffffffff8155b63b>] ? mutex_lock+0x1b/0x30 > [Wed Feb 17 17:23:48 2016] [<ffffffffa01bf51e>] ? > btrfs_delete_unused_bgs+0xee/0x3f0 [btrfs] > [Wed Feb 17 17:23:48 2016] [<ffffffff81559396>] ? __schedule+0x286/0x8f0 > [Wed Feb 17 17:23:48 2016] [<ffffffffa01c6ff7>] ? > cleaner_kthread+0x1a7/0x200 [btrfs] > [Wed Feb 17 17:23:48 2016] [<ffffffffa01c6e50>] ? > check_leaf+0x340/0x340 [btrfs] > [Wed Feb 17 17:23:48 2016] [<ffffffff8108df6f>] ? kthread+0xcf/0xf0 > [Wed Feb 17 17:23:48 2016] [<ffffffff8108dea0>] ? kthread_park+0x50/0x50 > [Wed Feb 17 17:23:48 2016] [<ffffffff8155d74f>] ? ret_from_fork+0x3f/0x70 > [Wed Feb 17 17:23:48 2016] [<ffffffff8108dea0>] ? kthread_park+0x50/0x50 > > [Wed Feb 17 17:57:48 2016] INFO: task btrfs-cleaner:38580 blocked for > more than 120 seconds. > [Wed Feb 17 17:57:48 2016] Not tainted 4.4.0-customkernel #1 > [Wed Feb 17 17:57:48 2016] "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [Wed Feb 17 17:57:48 2016] btrfs-cleaner D ffff881627a95dc0 0 > 38580 2 0x00000000 > [Wed Feb 17 17:57:48 2016] ffff882c16fa6480 ffff88161a980fc0 > ffff882a3d744000 ffff882a3d743df8 > [Wed Feb 17 17:57:48 2016] ffff8815fead7104 ffff882c16fa6480 > 00000000ffffffff ffff8815fead7108 > [Wed Feb 17 17:57:48 2016] ffffffff81559a31 ffff8815fead7100 > ffffffff81559cba ffffffff8155b5a0 > [Wed Feb 17 17:57:48 2016] Call Trace: > [Wed Feb 17 17:57:48 2016] [<ffffffff81559a31>] ? schedule+0x31/0x80 > [Wed Feb 17 17:57:48 2016] [<ffffffff81559cba>] ? > schedule_preempt_disabled+0xa/0x10 > [Wed Feb 17 17:57:48 2016] [<ffffffff8155b5a0>] ? > __mutex_lock_slowpath+0x90/0x110 > [Wed Feb 17 17:57:48 2016] [<ffffffff8155b63b>] ? mutex_lock+0x1b/0x30 > [Wed Feb 17 17:57:48 2016] [<ffffffffa01bf51e>] ? > btrfs_delete_unused_bgs+0xee/0x3f0 [btrfs] > [Wed Feb 17 17:57:48 2016] [<ffffffff81559396>] ? __schedule+0x286/0x8f0 > [Wed Feb 17 17:57:48 2016] [<ffffffffa01c6ff7>] ? > cleaner_kthread+0x1a7/0x200 [btrfs] > [Wed Feb 17 17:57:48 2016] [<ffffffffa01c6e50>] ? > check_leaf+0x340/0x340 [btrfs] > [Wed Feb 17 17:57:48 2016] [<ffffffff8108df6f>] ? kthread+0xcf/0xf0 > [Wed Feb 17 17:57:48 2016] [<ffffffff8108dea0>] ? kthread_park+0x50/0x50 > [Wed Feb 17 17:57:48 2016] [<ffffffff8155d74f>] ? ret_from_fork+0x3f/0x70 > [Wed Feb 17 17:57:48 2016] [<ffffffff8108dea0>] ? kthread_park+0x50/0x50 > > > ---- cut ---- > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
