Got this soon after boot:
[ 720.086389] INFO: task pidgin:11330 blocked for more than 120 seconds.
[ 720.086402] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.086406] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.086411] pidgin D 0000000000000004 0 11330 5187 0x00000080
[ 720.086423] ffff8803d7233c30 0000000000000082 ffff8803d7233c00
ffff8803d7233fd8
[ 720.086433] ffff8804066345d0 00000000000141c0 ffff88041e3141c0
ffff8804066345d0
[ 720.086441] ffff8803d7233cd0 0000000000000002 ffffffff810fda1a
ffff8803d7233c40
[ 720.086450] Call Trace:
[ 720.086468] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.086494] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.086502] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.086510] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.086519] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.086528] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.086536] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.086544] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.086553] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.086562] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.086573] [<ffffffff813159e0>] ? debug_smp_processor_id+0x17/0x19
[ 720.086581] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.086592] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.086602] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.086611] [<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[ 720.086620] [<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[ 720.086628] [<ffffffff8123883d>] btrfs_sync_file+0x8b/0x2b3
[ 720.086636] [<ffffffff8132042f>] ? __percpu_counter_add+0x8c/0xa6
[ 720.086647] [<ffffffff81157087>] ? __sb_end_write+0x2d/0x5b
[ 720.086657] [<ffffffff8117a1a7>] vfs_fsync_range+0x18/0x22
[ 720.086663] [<ffffffff8117a1cd>] vfs_fsync+0x1c/0x1e
[ 720.086670] [<ffffffff8117a3d9>] do_fsync+0x2c/0x4c
[ 720.086678] [<ffffffff8117a5e2>] SyS_fsync+0x10/0x14
[ 720.086686] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
[ 720.086698] INFO: task BrowserBlocking:12907 blocked for more than 120
seconds.
[ 720.086702] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.086706] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.086709] BrowserBlocking D 0000000000000007 0 12907 5254 0x00000080
[ 720.086718] ffff8803bc35dc30 0000000000000086 ffff8803bc35dc00
ffff8803bc35dfd8
[ 720.086726] ffff8803d704e090 00000000000141c0 ffff88041e3d41c0
ffff8803d704e090
[ 720.086734] ffff8803bc35dcd0 0000000000000002 ffffffff810fda1a
ffff8803bc35dc40
[ 720.086742] Call Trace:
[ 720.086751] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.086759] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.086767] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.086774] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.086783] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.086791] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.086797] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.086803] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.086810] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.086820] [<ffffffff810fdbef>] ? file_accessed+0x13/0x15
[ 720.086826] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.086833] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.086841] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.086849] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.086857] [<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[ 720.086866] [<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[ 720.086873] [<ffffffff8123883d>] btrfs_sync_file+0x8b/0x2b3
[ 720.086880] [<ffffffff8117a1a7>] vfs_fsync_range+0x18/0x22
[ 720.086887] [<ffffffff8117a1cd>] vfs_fsync+0x1c/0x1e
[ 720.086893] [<ffffffff8117a3d9>] do_fsync+0x2c/0x4c
[ 720.086901] [<ffffffff8117a5f9>] SyS_fdatasync+0x13/0x17
[ 720.086907] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
[ 720.086912] INFO: task Chrome_DBThread:12908 blocked for more than 120
seconds.
[ 720.086916] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.086920] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.086923] Chrome_DBThread D 0000000000000006 0 12908 5254 0x00000080
[ 720.086930] ffff8803bc32dc30 0000000000000086 ffff8803bc32dc00
ffff8803bc32dfd8
[ 720.086937] ffff8803d5406410 00000000000141c0 ffff88041e3941c0
ffff8803d5406410
[ 720.086945] ffff8803bc32dcd0 0000000000000002 ffffffff810fda1a
ffff8803bc32dc40
[ 720.086953] Call Trace:
[ 720.086961] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.086969] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.086977] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.086985] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.086993] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.087001] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.087008] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.087014] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.087020] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.087032] [<ffffffff8111ce6c>] ? pagefault_enable+0xe/0x21
[ 720.087040] [<ffffffff8111cfe2>] ? copy_page_to_iter+0x163/0x26b
[ 720.087049] [<ffffffff810fdbef>] ? file_accessed+0x13/0x15
[ 720.087055] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.087061] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.087070] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.087077] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.087086] [<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[ 720.087095] [<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[ 720.087101] [<ffffffff8123885a>] btrfs_sync_file+0xa8/0x2b3
[ 720.087109] [<ffffffff8117a1a7>] vfs_fsync_range+0x18/0x22
[ 720.087115] [<ffffffff8117a1cd>] vfs_fsync+0x1c/0x1e
[ 720.087122] [<ffffffff8117a3d9>] do_fsync+0x2c/0x4c
[ 720.087129] [<ffffffff8117a5f9>] SyS_fdatasync+0x13/0x17
[ 720.087135] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
[ 720.087143] INFO: task IndexedDB:12914 blocked for more than 120 seconds.
[ 720.087147] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.087150] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.087153] IndexedDB D 0000000000000003 0 12914 5254 0x00000080
[ 720.087160] ffff8803b9ee7c30 0000000000000086 ffff8803b9ee7c00
ffff8803b9ee7fd8
[ 720.087168] ffff8803d5666390 00000000000141c0 ffff88041e2d41c0
ffff8803d5666390
[ 720.087175] ffff8803b9ee7cd0 0000000000000002 ffffffff810fda1a
ffff8803b9ee7c40
[ 720.087183] Call Trace:
[ 720.087192] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.087200] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.087208] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.087215] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.087224] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.087232] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.087238] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.087244] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.087251] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.087261] [<ffffffff8161d274>] ? mutex_unlock+0x16/0x18
[ 720.087268] [<ffffffff81239c74>] ? btrfs_file_aio_write+0x3e9/0x4b6
[ 720.087275] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.087281] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.087289] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.087297] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.087305] [<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[ 720.087314] [<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[ 720.087321] [<ffffffff8123885a>] btrfs_sync_file+0xa8/0x2b3
[ 720.087328] [<ffffffff8132042f>] ? __percpu_counter_add+0x8c/0xa6
[ 720.087336] [<ffffffff8117a1a7>] vfs_fsync_range+0x18/0x22
[ 720.087342] [<ffffffff8117a1cd>] vfs_fsync+0x1c/0x1e
[ 720.087349] [<ffffffff8117a3d9>] do_fsync+0x2c/0x4c
[ 720.087356] [<ffffffff8117a5f9>] SyS_fdatasync+0x13/0x17
[ 720.087362] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
[ 720.087368] INFO: task BrowserBlocking:12917 blocked for more than 120
seconds.
[ 720.087372] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.087375] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.087379] BrowserBlocking D 0000000000000000 0 12917 5254 0x00000080
[ 720.087385] ffff8803bc3c3c30 0000000000000086 ffff8803bc3c3c00
ffff8803bc3c3fd8
[ 720.087393] ffff8803cf788050 00000000000141c0 ffff88041e2141c0
ffff8803cf788050
[ 720.087400] ffff8803bc3c3cd0 0000000000000002 ffffffff810fda1a
ffff8803bc3c3c40
[ 720.087408] Call Trace:
[ 720.087416] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.087424] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.087432] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.087440] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.087448] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.087456] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.087462] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.087468] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.087475] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.087483] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.087489] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.087498] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.087505] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.087514] [<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[ 720.087522] [<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[ 720.087529] [<ffffffff8123883d>] btrfs_sync_file+0x8b/0x2b3
[ 720.087536] [<ffffffff81157087>] ? __sb_end_write+0x2d/0x5b
[ 720.087544] [<ffffffff8117a1a7>] vfs_fsync_range+0x18/0x22
[ 720.087550] [<ffffffff8117a1cd>] vfs_fsync+0x1c/0x1e
[ 720.087557] [<ffffffff8117a3d9>] do_fsync+0x2c/0x4c
[ 720.087564] [<ffffffff8117a5e2>] SyS_fsync+0x10/0x14
[ 720.087570] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
[ 720.087577] INFO: task BrowserBlocking:12933 blocked for more than 120
seconds.
[ 720.087580] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.087584] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.087587] BrowserBlocking D 0000000000000000 0 12933 5254 0x00000080
[ 720.087593] ffff8803b798bc30 0000000000000086 ffff8803b798bc00
ffff8803b798bfd8
[ 720.087601] ffff8800bb862190 00000000000141c0 ffff88041e2141c0
ffff8800bb862190
[ 720.087608] ffff8803b798bcd0 0000000000000002 ffffffff810fda1a
ffff8803b798bc40
[ 720.087616] Call Trace:
[ 720.087624] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.087632] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.087640] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.087648] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.087656] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.087664] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.087670] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.087676] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.087683] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.087712] [<ffffffff8161d274>] ? mutex_unlock+0x16/0x18
[ 720.087719] [<ffffffff81239c74>] ? btrfs_file_aio_write+0x3e9/0x4b6
[ 720.087725] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.087731] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.087740] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.087748] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.087756] [<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[ 720.087765] [<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[ 720.087771] [<ffffffff8123885a>] btrfs_sync_file+0xa8/0x2b3
[ 720.087778] [<ffffffff8132042f>] ? __percpu_counter_add+0x8c/0xa6
[ 720.087786] [<ffffffff8117a1a7>] vfs_fsync_range+0x18/0x22
[ 720.087793] [<ffffffff8117a1cd>] vfs_fsync+0x1c/0x1e
[ 720.087799] [<ffffffff8117a3d9>] do_fsync+0x2c/0x4c
[ 720.087806] [<ffffffff8117a5f9>] SyS_fdatasync+0x13/0x17
[ 720.087812] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
[ 720.087881] INFO: task mutt:13900 blocked for more than 120 seconds.
[ 720.087885] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.087888] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.087892] mutt D 0000000000000006 0 13900 7279 0x00000080
[ 720.087898] ffff880096b45b40 0000000000000086 ffff880096b45b10
ffff880096b45fd8
[ 720.087906] ffff880096a341d0 00000000000141c0 ffff88041e3941c0
ffff880096a341d0
[ 720.087913] ffff880096b45be0 0000000000000002 ffffffff810fda1a
ffff880096b45b50
[ 720.087921] Call Trace:
[ 720.087930] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.087938] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.087945] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.087953] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.087961] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.087969] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.087975] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.087981] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.087988] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.087996] [<ffffffff8110a5b2>] ? pagevec_lookup_entries+0x1e/0x26
[ 720.088003] [<ffffffff8110ae23>] ? truncate_inode_pages_range+0x2a9/0x3ad
[ 720.088013] [<ffffffff81211106>] ? setup_items_for_insert+0x2ba/0x2da
[ 720.088019] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.088025] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.088034] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.088042] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.088050] [<ffffffff810ff179>] __filemap_fdatawrite_range+0x55/0x57
[ 720.088059] [<ffffffff810ff1ef>] filemap_fdatawrite_range+0x13/0x15
[ 720.088067] [<ffffffff8123fcda>] btrfs_wait_ordered_range+0x85/0x11a
[ 720.088074] [<ffffffff8123321e>] btrfs_truncate+0x45/0x22b
[ 720.088081] [<ffffffff81233cb1>] btrfs_setattr+0x19b/0x273
[ 720.088090] [<ffffffff8116b148>] notify_change+0x1be/0x2a6
[ 720.088100] [<ffffffff81153d74>] do_truncate+0x69/0x90
[ 720.088108] [<ffffffff811579d5>] ? __sb_start_write+0x9f/0xd3
[ 720.088117] [<ffffffff81153fff>] do_sys_ftruncate.constprop.6+0xbf/0xf3
[ 720.088126] [<ffffffff81154064>] SyS_ftruncate+0xe/0x10
[ 720.088132] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
[ 720.088153] INFO: task kworker/u16:51:15411 blocked for more than 120
seconds.
[ 720.088157] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.088160] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.088163] kworker/u16:51 D 0000000000000000 0 15411 2 0x00000080
[ 720.088179] Workqueue: btrfs-delalloc normal_work_helper
[ 720.088183] ffff8800751db860 0000000000000046 ffff8800751db830
ffff8800751dbfd8
[ 720.088190] ffff8800751d8550 00000000000141c0 ffff88041e2541c0
ffff8800751d8550
[ 720.088198] ffff8800751db900 0000000000000002 ffffffff810fda1a
ffff8800751db870
[ 720.088206] Call Trace:
[ 720.088214] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.088222] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.088230] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.088238] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.088246] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.088254] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.088260] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.088268] [<ffffffff810fe3c9>] lock_page+0x19/0x1c
[ 720.088276] [<ffffffff810fe425>] find_lock_entry+0x33/0x55
[ 720.088284] [<ffffffff810fe455>] find_lock_page+0xe/0x1b
[ 720.088293] [<ffffffff810fe93e>] find_or_create_page+0x31/0x83
[ 720.088302] [<ffffffff8125edca>] io_ctl_prepare_pages+0x49/0x11c
[ 720.088310] [<ffffffff8126097a>] __load_free_space_cache+0x1be/0x56c
[ 720.088319] [<ffffffff81260e0e>] load_free_space_cache+0xe6/0x199
[ 720.088330] [<ffffffff810764de>] ? get_parent_ip+0xd/0x3c
[ 720.088339] [<ffffffff81215c2e>] cache_block_group+0x1c4/0x343
[ 720.088345] [<ffffffff8108473d>] ? finish_wait+0x65/0x65
[ 720.088354] [<ffffffff8121a966>] find_free_extent+0x391/0x89e
[ 720.088363] [<ffffffff8121afce>] btrfs_reserve_extent+0x70/0x114
[ 720.088370] [<ffffffff8123087c>] cow_file_range+0x1b0/0x388
[ 720.088377] [<ffffffff8123152b>] submit_compressed_extents+0x102/0x40f
[ 720.088384] [<ffffffff8122fa27>] ? async_cow_free+0x24/0x27
[ 720.088391] [<ffffffff812318be>] async_cow_submit+0x86/0x8b
[ 720.088399] [<ffffffff812505c1>] normal_work_helper+0x194/0x240
[ 720.088408] [<ffffffff81065d2e>] process_one_work+0x195/0x2d2
[ 720.088415] [<ffffffff8106624a>] worker_thread+0x136/0x205
[ 720.088422] [<ffffffff81066114>] ? rescuer_thread+0x27a/0x27a
[ 720.088429] [<ffffffff8106b467>] kthread+0xae/0xb6
[ 720.088435] [<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[ 720.088441] [<ffffffff81625abc>] ret_from_fork+0x7c/0xb0
[ 720.088447] [<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[ 720.088453] INFO: task kworker/u16:55:15415 blocked for more than 120
seconds.
[ 720.088456] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.088460] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.088463] kworker/u16:55 D 0000000000000000 0 15415 2 0x00000080
[ 720.088475] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-1)
[ 720.088480] ffff8800752a5a00 0000000000000046 ffff8800752a59d0
ffff8800752a5fd8
[ 720.088488] ffff8800b9ef4550 00000000000141c0 ffff88041e2541c0
ffff8800b9ef4550
[ 720.088496] ffff8800752a5aa0 0000000000000002 ffffffff810fda1a
ffff8800752a5a10
[ 720.088503] Call Trace:
[ 720.088512] [<ffffffff810fda1a>] ? wait_on_page_read+0x3c/0x3c
[ 720.088520] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.088528] [<ffffffff8161c9bb>] io_schedule+0x60/0x7a
[ 720.088535] [<ffffffff810fda28>] sleep_on_page+0xe/0x12
[ 720.088544] [<ffffffff8161cd4b>] __wait_on_bit_lock+0x46/0x8a
[ 720.088552] [<ffffffff810fdae3>] __lock_page+0x69/0x6b
[ 720.088558] [<ffffffff81084771>] ? autoremove_wake_function+0x34/0x34
[ 720.088564] [<ffffffff81240c41>] lock_page+0x1e/0x21
[ 720.088571] [<ffffffff8124470e>]
extent_write_cache_pages.isra.16.constprop.32+0x10e/0x2c6
[ 720.088579] [<ffffffff81244b6c>] extent_writepages+0x4b/0x5c
[ 720.088585] [<ffffffff8122ee1f>] ? btrfs_submit_direct+0x3f4/0x3f4
[ 720.088594] [<ffffffff816227cc>] ? preempt_count_add+0x77/0x8d
[ 720.088602] [<ffffffff8122d3fa>] btrfs_writepages+0x28/0x2a
[ 720.088610] [<ffffffff811082b1>] do_writepages+0x1e/0x2c
[ 720.088616] [<ffffffff81175ef2>] __writeback_single_inode+0x7d/0x238
[ 720.088623] [<ffffffff81176c2a>] writeback_sb_inodes+0x1eb/0x339
[ 720.088630] [<ffffffff81176dec>] __writeback_inodes_wb+0x74/0xb7
[ 720.088637] [<ffffffff81176f67>] wb_writeback+0x138/0x293
[ 720.088644] [<ffffffff811774ce>] bdi_writeback_workfn+0xc9/0x329
[ 720.088655] [<ffffffff8100d047>] ? load_TLS+0xb/0xf
[ 720.088661] [<ffffffff810733c1>] ? mmdrop+0x11/0x20
[ 720.088669] [<ffffffff81065d2e>] process_one_work+0x195/0x2d2
[ 720.088676] [<ffffffff8106624a>] worker_thread+0x136/0x205
[ 720.088683] [<ffffffff81066114>] ? rescuer_thread+0x27a/0x27a
[ 720.088689] [<ffffffff8106b467>] kthread+0xae/0xb6
[ 720.088695] [<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[ 720.088701] [<ffffffff81625abc>] ret_from_fork+0x7c/0xb0
[ 720.088707] [<ffffffff8106b3b9>] ? __kthread_parkme+0x61/0x61
[ 720.088726] INFO: task sync:18457 blocked for more than 120 seconds.
[ 720.088730] Not tainted 3.15.0-rc5-amd64-i915-preempt-20140216s1 #1
[ 720.088733] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 720.088737] sync D 0000000000000001 0 18457 18373 0x00000080
[ 720.088743] ffff8802e6fe3d60 0000000000000086 ffff8800b9ef4cdc
ffff8802e6fe3fd8
[ 720.088751] ffff8802aa324190 00000000000141c0 7fffffffffffffff
ffff8802e6fe3e98
[ 720.088758] 0000000000000002 ffffffff8161be00 7fffffffffffffff
ffff8802e6fe3d70
[ 720.088766] Call Trace:
[ 720.088775] [<ffffffff8161be00>] ? sock_rps_reset_flow+0x36/0x36
[ 720.088783] [<ffffffff8161c816>] schedule+0x73/0x75
[ 720.088791] [<ffffffff8161be39>] schedule_timeout+0x39/0x129
[ 720.088798] [<ffffffff8161ef3b>] ? _raw_spin_unlock+0x17/0x2a
[ 720.088805] [<ffffffff810764de>] ? get_parent_ip+0xd/0x3c
[ 720.088813] [<ffffffff816227cf>] ? preempt_count_add+0x7a/0x8d
[ 720.088821] [<ffffffff8161cffc>] __wait_for_common+0x11a/0x159
[ 720.088831] [<ffffffff810780a9>] ? wake_up_state+0x12/0x12
[ 720.088838] [<ffffffff8117a1cf>] ? vfs_fsync+0x1e/0x1e
[ 720.088846] [<ffffffff8161d05f>] wait_for_completion+0x24/0x26
[ 720.088852] [<ffffffff81176485>] sync_inodes_sb+0xb6/0x1a0
[ 720.088860] [<ffffffff8117a1cf>] ? vfs_fsync+0x1e/0x1e
[ 720.088867] [<ffffffff8117a1e3>] sync_inodes_one_sb+0x14/0x16
[ 720.088874] [<ffffffff81157cf4>] iterate_supers+0x6e/0xc2
[ 720.088881] [<ffffffff8117a4be>] sys_sync+0x32/0x80
[ 720.088888] [<ffffffff81625b6d>] system_call_fastpath+0x1a/0x1f
--
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
.... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/
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