Hi, I got these during heavy IO (fs indexing):
[175200.080150] INFO: task akonadi_baloo_i:6489 blocked for more than 480 seconds. [175200.080160] Not tainted 3.16.0-rc2-12.gfc9498b-desktop+ #2 [175200.080164] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [175200.080169] akonadi_baloo_i D ffff88011fc13a00 0 6489 6330 0x00000000 [175200.080178] ffff8800db70bc78 0000000000000086 ffff8800b3fd4390 0000000000013a00 [175200.080186] ffff8800db70bfd8 0000000000013a00 ffff8800b3fd4390 ffff88011fc14310 [175200.080192] ffff88011ffcb408 ffff8800db70bd00 0000000000000002 ffffffff81140710 [175200.080198] Call Trace: [175200.080212] [<ffffffff81140710>] ? wait_on_page_read+0x60/0x60 [175200.080223] [<ffffffff816101fa>] io_schedule+0xaa/0x140 [175200.080230] [<ffffffff81140719>] sleep_on_page+0x9/0x10 [175200.080237] [<ffffffff81610763>] __wait_on_bit_lock+0x43/0xa0 [175200.080244] [<ffffffff81140815>] __lock_page+0x65/0x70 [175200.080251] [<ffffffff810a3570>] ? autoremove_wake_function+0x30/0x30 [175200.080322] [<ffffffffc05001a9>] ? flush_write_bio+0x9/0x10 [btrfs] [175200.080367] [<ffffffffc05041a8>] extent_write_cache_pages.isra.28.constprop.46+0x2d8/0x3e0 [btrfs] [175200.080411] [<ffffffffc05060f8>] extent_writepages+0x48/0x60 [btrfs] [175200.080451] [<ffffffffc04e9460>] ? btrfs_writepage_end_io_hook+0x1a0/0x1a0 [btrfs] [175200.080489] [<ffffffffc04e6e83>] btrfs_writepages+0x23/0x30 [btrfs] [175200.080496] [<ffffffff8114de79>] do_writepages+0x19/0x30 [175200.080503] [<ffffffff81142281>] __filemap_fdatawrite_range+0x51/0x60 [175200.080510] [<ffffffff8114233e>] filemap_fdatawrite_range+0xe/0x10 [175200.080549] [<ffffffffc04f53e9>] btrfs_sync_file+0x49/0x310 [btrfs] [175200.080558] [<ffffffff8107c134>] ? task_work_run+0xb4/0xf0 [175200.080564] [<ffffffff811e302c>] do_fsync+0x4c/0x80 [175200.080570] [<ffffffff811e32ab>] SyS_fsync+0xb/0x10 [175200.080577] [<ffffffff816145ad>] system_call_fastpath+0x1a/0x1f [175200.080588] INFO: task kworker/u12:4:7346 blocked for more than 480 seconds. [175200.080592] Not tainted 3.16.0-rc2-12.gfc9498b-desktop+ #2 [175200.080595] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [175200.080599] kworker/u12:4 D ffff88011fcd3a00 0 7346 2 0x00000000 [175200.080609] Workqueue: writeback bdi_writeback_workfn (flush-btrfs-5) [175200.080613] ffff880060c5b9d8 0000000000000046 ffff88003ffec510 0000000000013a00 [175200.080619] ffff880060c5bfd8 0000000000013a00 ffff88003ffec510 ffff88011fcd4310 [175200.080625] ffff88011ffc9608 ffff880060c5ba60 0000000000000002 ffffffff81140710 [175200.080630] Call Trace: [175200.080638] [<ffffffff81140710>] ? wait_on_page_read+0x60/0x60 [175200.080645] [<ffffffff816101fa>] io_schedule+0xaa/0x140 [175200.080652] [<ffffffff81140719>] sleep_on_page+0x9/0x10 [175200.080659] [<ffffffff81610763>] __wait_on_bit_lock+0x43/0xa0 [175200.080665] [<ffffffff81140815>] __lock_page+0x65/0x70 [175200.080671] [<ffffffff810a3570>] ? autoremove_wake_function+0x30/0x30 [175200.080713] [<ffffffffc05001a9>] ? flush_write_bio+0x9/0x10 [btrfs] [175200.080754] [<ffffffffc05041a8>] extent_write_cache_pages.isra.28.constprop.46+0x2d8/0x3e0 [btrfs] [175200.080797] [<ffffffffc05060f8>] extent_writepages+0x48/0x60 [btrfs] [175200.080836] [<ffffffffc04e9460>] ? btrfs_writepage_end_io_hook+0x1a0/0x1a0 [btrfs] [175200.080874] [<ffffffffc04e6e83>] btrfs_writepages+0x23/0x30 [btrfs] [175200.080880] [<ffffffff8114de79>] do_writepages+0x19/0x30 [175200.080888] [<ffffffff811dbacb>] __writeback_single_inode+0x3b/0x2c0 [175200.080894] [<ffffffff810a3180>] ? wake_up_bit+0x20/0x30 [175200.081050] [<ffffffff811dca87>] writeback_sb_inodes+0x247/0x3e0 [175200.081059] [<ffffffff811dccb7>] __writeback_inodes_wb+0x97/0xd0 [175200.081072] [<ffffffff811dcefb>] wb_writeback+0x20b/0x340 [175200.081078] [<ffffffff811df3b9>] bdi_writeback_workfn+0x1d9/0x490 [175200.081086] [<ffffffff81078333>] process_one_work+0x173/0x4c0 [175200.081092] [<ffffffff81078ba3>] worker_thread+0x63/0x540 [175200.081100] [<ffffffff81078b40>] ? create_and_start_worker+0x40/0x40 [175200.081106] [<ffffffff8107efb6>] kthread+0xd6/0xf0 [175200.081112] [<ffffffff8107eee0>] ? kthread_create_on_node+0x180/0x180 [175200.081118] [<ffffffff816144fc>] ret_from_fork+0x7c/0xb0 [175200.081124] [<ffffffff8107eee0>] ? kthread_create_on_node+0x180/0x180 [175200.081136] INFO: task kworker/u12:10:9821 blocked for more than 480 seconds. [175200.081140] Not tainted 3.16.0-rc2-12.gfc9498b-desktop+ #2 [175200.081143] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [175200.081146] kworker/u12:10 D ffff88011fc13a00 0 9821 2 0x00000000 [175200.081196] Workqueue: btrfs-delalloc normal_work_helper [btrfs] [175200.081200] ffff88000392f858 0000000000000046 ffff8800039b2210 0000000000013a00 [175200.081206] ffff88000392ffd8 0000000000013a00 ffff8800039b2210 ffff88011fc14310 [175200.081211] ffff88011ffcd988 ffff88000392f8e0 0000000000000002 ffffffff81140710 [175200.081217] Call Trace: [175200.081224] [<ffffffff81140710>] ? wait_on_page_read+0x60/0x60 [175200.081231] [<ffffffff816101fa>] io_schedule+0xaa/0x140 [175200.081237] [<ffffffff81140719>] sleep_on_page+0x9/0x10 [175200.081244] [<ffffffff81610763>] __wait_on_bit_lock+0x43/0xa0 [175200.081251] [<ffffffff81140815>] __lock_page+0x65/0x70 [175200.081257] [<ffffffff810a3570>] ? autoremove_wake_function+0x30/0x30 [175200.081264] [<ffffffff811414bc>] pagecache_get_page+0xac/0x1d0 [175200.081306] [<ffffffffc0526017>] io_ctl_prepare_pages+0x67/0x180 [btrfs] [175200.081349] [<ffffffffc0527d13>] __load_free_space_cache+0x1d3/0x680 [btrfs] [175200.081392] [<ffffffffc05282b4>] load_free_space_cache+0xf4/0x1b0 [btrfs] [175200.081425] [<ffffffffc04c6cd2>] cache_block_group+0x192/0x390 [btrfs] [175200.081431] [<ffffffff810a3540>] ? prepare_to_wait_event+0x100/0x100 [175200.081465] [<ffffffffc04d1dea>] find_free_extent+0x95a/0xdb0 [btrfs] [175200.081500] [<ffffffffc04d2400>] btrfs_reserve_extent+0x60/0x150 [btrfs] [175200.081539] [<ffffffffc04eb4db>] cow_file_range+0x12b/0x400 [btrfs] [175200.081582] [<ffffffffc04e9460>] ? btrfs_writepage_end_io_hook+0x1a0/0x1a0 [btrfs] [175200.081621] [<ffffffffc04ec7b5>] submit_compressed_extents+0x1f5/0x460 [btrfs] [175200.081661] [<ffffffffc04eca20>] ? submit_compressed_extents+0x460/0x460 [btrfs] [175200.081704] [<ffffffffc04ecaa1>] async_cow_submit+0x81/0x90 [btrfs] [175200.081746] [<ffffffffc05142c3>] normal_work_helper+0x1b3/0x340 [btrfs] [175200.081753] [<ffffffff81078333>] process_one_work+0x173/0x4c0 [175200.081760] [<ffffffff81078ba3>] worker_thread+0x63/0x540 [175200.081767] [<ffffffff81078b40>] ? create_and_start_worker+0x40/0x40 [175200.081773] [<ffffffff8107efb6>] kthread+0xd6/0xf0 [175200.081779] [<ffffffff8107eee0>] ? kthread_create_on_node+0x180/0x180 [175200.081785] [<ffffffff816144fc>] ret_from_fork+0x7c/0xb0 [175200.081791] [<ffffffff8107eee0>] ? kthread_create_on_node+0x180/0x180 [175200.081797] INFO: task baloo_file_extr:10005 blocked for more than 480 seconds. [175200.081801] Not tainted 3.16.0-rc2-12.gfc9498b-desktop+ #2 [175200.081803] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [175200.081806] baloo_file_extr D ffff88011fc93a00 0 10005 6266 0x00000004 [175200.081812] ffff8800c748fc78 0000000000000086 ffff8800a2a44390 0000000000013a00 [175200.081821] ffff8800c748ffd8 0000000000013a00 ffff8800a2a44390 ffff88011fc94310 [175200.081826] ffff88011ffcace8 ffff8800c748fd00 0000000000000002 ffffffff81140710 [175200.081832] Call Trace: [175200.081839] [<ffffffff81140710>] ? wait_on_page_read+0x60/0x60 [175200.081846] [<ffffffff816101fa>] io_schedule+0xaa/0x140 [175200.081852] [<ffffffff81140719>] sleep_on_page+0x9/0x10 [175200.081859] [<ffffffff81610763>] __wait_on_bit_lock+0x43/0xa0 [175200.081866] [<ffffffff81140815>] __lock_page+0x65/0x70 [175200.081871] [<ffffffff810a3570>] ? autoremove_wake_function+0x30/0x30 [175200.081913] [<ffffffffc05001a9>] ? flush_write_bio+0x9/0x10 [btrfs] [175200.082079] [<ffffffffc05041a8>] extent_write_cache_pages.isra.28.constprop.46+0x2d8/0x3e0 [btrfs] [175200.082122] [<ffffffffc05060f8>] extent_writepages+0x48/0x60 [btrfs] [175200.082160] [<ffffffffc04e9460>] ? btrfs_writepage_end_io_hook+0x1a0/0x1a0 [btrfs] [175200.082198] [<ffffffffc04e6e83>] btrfs_writepages+0x23/0x30 [btrfs] [175200.082205] [<ffffffff8114de79>] do_writepages+0x19/0x30 [175200.082212] [<ffffffff81142281>] __filemap_fdatawrite_range+0x51/0x60 [175200.082219] [<ffffffff8114233e>] filemap_fdatawrite_range+0xe/0x10 [175200.082259] [<ffffffffc04f53e9>] btrfs_sync_file+0x49/0x310 [btrfs] [175200.082266] [<ffffffff8107c134>] ? task_work_run+0xb4/0xf0 [175200.082272] [<ffffffff811e302c>] do_fsync+0x4c/0x80 [175200.082278] [<ffffffff811e32ab>] SyS_fsync+0xb/0x10 [175200.082284] [<ffffffff816145ad>] system_call_fastpath+0x1a/0x1f Marc -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
