Hello, today i had the following bcache deadlock - where in the end xfs failed. Is this a known bug? any patch i can apply? INFO: task bcache:335 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. bcache D ffff88103842fd18 0 335 2 0x00080000 Workqueue: bcache bch_data_insert_keys [bcache] ffff88103842fd18 00ff88103842fde0 ffff88103b25a580 ffff8801812c0000 ffff881038430000 ffff88103842fd88 0000000000000003 ffff88103520cd00 ffff881035200000 ffff88103842fd30 ffffffff906e30b5 ffff88103b25a580 Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffffc05c2d6b>] __closure_sync+0x4b/0x2e0 [bcache] [<ffffffffc05b2c5c>] bch_journal+0xec/0x360 [bcache] [<ffffffffc05b422f>] bch_data_insert_keys+0x9f/0xe0 [bcache] [<ffffffff9009eda1>] process_one_work+0x201/0x4a0 [<ffffffff9009f73b>] rescuer_thread+0x22b/0x3e0 [<ffffffff900a52f8>] kthread+0xd8/0xf0 [<ffffffff906e7ac5>] ret_from_fork+0x55/0x80 DWARF2 unwinder stuck at ret_from_fork+0x55/0x80 Leftover inexact backtrace: [2544108.748799] [<ffffffff900a5220>] ? kthread_park+0x60/0x60 INFO: task bcache_writebac:382 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. bcache_writebac D ffff88103440bd08 0 382 2 0x00080000 ffff88103440bd08 00ff88103440bd18 ffff88103823cb00 ffff880181548000 ffff88103440c000 ffff881035530ac8 ffff881035530ae0 ffff881035530ad0 ffff881035530ac8 ffff88103440bd20 ffffffff906e30b5 ffff88103823cb00 Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff906e5b57>] rwsem_down_write_failed+0x1e7/0x390 [<ffffffff903e05d7>] call_rwsem_down_write_failed+0x17/0x30 DWARF2 unwinder stuck at call_rwsem_down_write_failed+0x17/0x30 Leftover inexact backtrace: [2544108.750407] [<ffffffff906e5254>] down_write+0x24/0x40 [<ffffffffc05c2598>] bch_writeback_thread+0x58/0x480 [bcache] [<ffffffffc05c2540>] ? read_dirty+0x500/0x500 [bcache] [<ffffffff900a52f8>] kthread+0xd8/0xf0 [<ffffffff900a5220>] ? kthread_park+0x60/0x60 [<ffffffff906e7ac5>] ret_from_fork+0x55/0x80 [<ffffffff900a5220>] ? kthread_park+0x60/0x60 INFO: task bcache_writebac:385 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. bcache_writebac D ffff88102b697d08 0 385 2 0x00080000 ffff88102b697d08 00ff88102b697d18 ffff8810384ca580 ffff880181562580 ffff88102b698000 ffff881038220ac8 ffff881038220ae0 ffff881038220ad0 ffff881038220ac8 ffff88102b697d20 ffffffff906e30b5 ffff8810384ca580 Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff906e5b57>] rwsem_down_write_failed+0x1e7/0x390 [<ffffffff903e05d7>] call_rwsem_down_write_failed+0x17/0x30 DWARF2 unwinder stuck at call_rwsem_down_write_failed+0x17/0x30 Leftover inexact backtrace: [2544108.752030] [<ffffffff906e5254>] down_write+0x24/0x40 [<ffffffffc05c2598>] bch_writeback_thread+0x58/0x480 [bcache] [<ffffffffc05c2540>] ? read_dirty+0x500/0x500 [bcache] [<ffffffff900a52f8>] kthread+0xd8/0xf0 [<ffffffff900a5220>] ? kthread_park+0x60/0x60 [<ffffffff906e7ac5>] ret_from_fork+0x55/0x80 [<ffffffff900a5220>] ? kthread_park+0x60/0x60 INFO: task tp_osd_tp:4126 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. tp_osd_tp D ffff880f31eebe38 0 4126 1 0x00080000 ffff880f31eebe38 000000000047ffff ffff880f31ebcb00 ffff880181548000 ffff880f31eec000 ffffffff90e81564 ffff880f31ebcb00 00000000ffffffff ffffffff90e81568 ffff880f31eebe50 ffffffff906e30b5 ffffffff90e81560 Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff906e339e>] schedule_preempt_disabled+0xe/0x10 [<ffffffff906e4ce5>] __mutex_lock_slowpath+0x95/0x110 [<ffffffff906e4d77>] mutex_lock+0x17/0x30 [<ffffffff9016bb62>] lru_add_drain_all+0x32/0x180 [<ffffffff9019ec6a>] SyS_fadvise64+0x1ca/0x280 [<ffffffff906e7685>] entry_SYSCALL_64_fastpath+0x1e/0xb6 DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xb6 Leftover inexact backtrace: [2544108.753700] INFO: task tp_osd_tp:4355 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. tp_osd_tp D ffff881005f6fd38 0 4355 1 0x00080004 ffff881005f6fd38 0000000000000000 ffff880efb4acb00 ffff88018154a580 ffff881005f70000 ffff881005f6fe90 ffff881005f6fe88 ffff880efb4acb00 000000000000000c ffff881005f6fd50 ffffffff906e30b5 7fffffffffffffff Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff906e6396>] schedule_timeout+0x1b6/0x270 [<ffffffff906e442f>] wait_for_completion+0x9f/0x110 [<ffffffff9009fcdf>] flush_work+0xff/0x1a0 [<ffffffff9016bc6c>] lru_add_drain_all+0x13c/0x180 [<ffffffff9019ec6a>] SyS_fadvise64+0x1ca/0x280 [<ffffffff906e7685>] entry_SYSCALL_64_fastpath+0x1e/0xb6 DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xb6 Leftover inexact backtrace: [2544108.755357] INFO: task tp_fstore_op:4925 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. tp_fstore_op D ffff880e26defdd0 0 4925 1 0x00080004 ffff880e26defdd0 00ff88103e354780 ffff880e383fa580 ffff880181548000 ffff880e26df0000 ffff88103d40af18 ffff880e26defe8c ffff880e383fa580 ffff880fc353b000 ffff880e26defde8 ffffffff906e30b5 00004742000518a8 Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff903558b6>] _xfs_log_force_lsn+0x196/0x320 [<ffffffff903385ec>] __xfs_fsync+0xec/0x1c0 [<ffffffff903386d8>] xfs_file_fsync+0x18/0x20 [<ffffffff902086de>] vfs_fsync_range+0x4e/0xb0 [<ffffffff9020879d>] do_fsync+0x3d/0x70 [<ffffffff90208a20>] SyS_fsync+0x10/0x20 [<ffffffff906e7685>] entry_SYSCALL_64_fastpath+0x1e/0xb6 DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xb6 Leftover inexact backtrace: [2544108.757028] INFO: task tp_fstore_op:4927 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. tp_fstore_op D ffff880e37867bb8 0 4927 1 0x00080004 ffff880e37867bb8 00ff880e37867be0 ffff880e0f0e0000 ffff880181562580 ffff880e37868000 ffff88107fd75b80 7fffffffffffffff ffffffff906e3880 ffff880e37867d10 ffff880e37867bd0 ffffffff906e30b5 0000000000000000 Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff906e6396>] schedule_timeout+0x1b6/0x270 [<ffffffff906e2854>] io_schedule_timeout+0xa4/0x110 [<ffffffff906e389b>] bit_wait_io+0x1b/0x70 [<ffffffff906e34cd>] __wait_on_bit+0x5d/0x90 [<ffffffff9015a23b>] wait_on_page_bit+0x7b/0x80 [<ffffffff9015a324>] __filemap_fdatawait_range+0xe4/0x140 [<ffffffff9015a394>] filemap_fdatawait_range+0x14/0x30 [<ffffffff9015c1af>] filemap_write_and_wait_range+0x3f/0x70 [<ffffffff9033854d>] __xfs_fsync+0x4d/0x1c0 [<ffffffff903386d8>] xfs_file_fsync+0x18/0x20 [<ffffffff902086de>] vfs_fsync_range+0x4e/0xb0 [<ffffffff9020879d>] do_fsync+0x3d/0x70 [<ffffffff90208a43>] SyS_fdatasync+0x13/0x20 [<ffffffff906e7685>] entry_SYSCALL_64_fastpath+0x1e/0xb6 DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xb6 Leftover inexact backtrace: [2544108.758684] INFO: task tp_osd_tp:4998 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. tp_osd_tp D ffff880dbbb2f7c8 0 4998 1 0x00080004 ffff880dbbb2f7c8 00ff880af4b96d80 ffff881007b1cb00 ffff88018151a580 ffff880dbbb30000 ffff88102dcf9b30 ffff881007b1cb00 0000000000000001 ffff880fc6255000 ffff880dbbb2f7e0 ffffffff906e30b5 7fffffffffffffff Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff906e6396>] schedule_timeout+0x1b6/0x270 [<ffffffff906e4ecf>] __down+0x6f/0xb0 [<ffffffff900cfce1>] down+0x41/0x50 [<ffffffff90332fdc>] xfs_buf_lock+0x3c/0x100 [<ffffffff90333215>] _xfs_buf_find+0x175/0x3b0 [<ffffffff9033347a>] xfs_buf_get_map+0x2a/0x270 [<ffffffff9033420d>] xfs_buf_read_map+0x2d/0x180 [<ffffffff903616ea>] xfs_trans_read_buf_map+0xfa/0x340 [<ffffffff90313260>] xfs_da_read_buf+0xb0/0xe0 [<ffffffff90319d20>] xfs_dir3_leaf_read.constprop.15+0x30/0x60 [<ffffffff9031b481>] xfs_dir2_leaf_lookup_int+0x51/0x290 [<ffffffff9031b6f0>] xfs_dir2_leaf_lookup+0x30/0x140 [<ffffffff90316607>] xfs_dir_lookup+0x177/0x190 [<ffffffff9034534a>] xfs_lookup+0x5a/0x110 [<ffffffff903420d8>] xfs_vn_lookup+0x58/0xa0 [<ffffffff901dfc93>] lookup_real+0x23/0x60 [<ffffffff901e16e3>] __lookup_hash+0x33/0x40 [<ffffffff901e2aca>] walk_component+0x20a/0x2e0 [<ffffffff901e3b87>] path_lookupat+0x67/0x120 [<ffffffff901e53ca>] filename_lookup+0x9a/0x110 [<ffffffff901e54f6>] user_path_at_empty+0x36/0x40 [<ffffffff901db533>] vfs_fstatat+0x53/0xa0 [<ffffffff901db9af>] SYSC_newstat+0x1f/0x40 [<ffffffff901dbaae>] SyS_newstat+0xe/0x10 [<ffffffff906e7685>] entry_SYSCALL_64_fastpath+0x1e/0xb6 DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xb6 Leftover inexact backtrace: [2544108.760372] INFO: task xfsaild/bcache0:4209 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. xfsaild/bcache0 D ffff880f21713d40 0 4209 2 0x00080000 ffff880f21713d40 00ff88101d607000 ffff881034bc0000 ffff880181530000 ffff880f21714000 ffff881034bc0000 ffff88101d607000 ffff88101d607128 ffff880ff00a3c00 ffff880f21713d58 ffffffff906e30b5 0000000000000000 Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff903554f7>] _xfs_log_force+0x137/0x280 [<ffffffff90355666>] xfs_log_force+0x26/0x90 [<ffffffff90360445>] xfsaild+0x155/0x6b0 [<ffffffff900a52f8>] kthread+0xd8/0xf0 [<ffffffff906e7ac5>] ret_from_fork+0x55/0x80 DWARF2 unwinder stuck at ret_from_fork+0x55/0x80 Leftover inexact backtrace: [2544108.762015] [<ffffffff900a5220>] ? kthread_park+0x60/0x60 INFO: task tp_fstore_op:4909 blocked for more than 120 seconds. Not tainted 4.4.120+555-ph #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. tp_fstore_op D ffff880e10e17888 0 4909 1 0x00080004 ffff880e10e17888 00ff880e10e17878 ffff880eda1dcb00 ffffffff90e134c0 ffff880e10e18000 ffff88015609ac30 ffff880eda1dcb00 0000000000000001 ffff88102a45d300 ffff880e10e178a0 ffffffff906e30b5 7fffffffffffffff Call Trace: [<ffffffff906e30b5>] schedule+0x35/0x80 [<ffffffff906e6396>] schedule_timeout+0x1b6/0x270 [<ffffffff906e4ecf>] __down+0x6f/0xb0 [<ffffffff900cfce1>] down+0x41/0x50 [<ffffffff90332fdc>] xfs_buf_lock+0x3c/0x100 [<ffffffff90333215>] _xfs_buf_find+0x175/0x3b0 [<ffffffff9033347a>] xfs_buf_get_map+0x2a/0x270 [<ffffffff9033420d>] xfs_buf_read_map+0x2d/0x180 [<ffffffff903616ea>] xfs_trans_read_buf_map+0xfa/0x340 [<ffffffff90313260>] xfs_da_read_buf+0xb0/0xe0 [<ffffffff902fa379>] xfs_attr3_leaf_read+0x29/0x60 [<ffffffff902f8464>] xfs_attr_leaf_addname+0x44/0x3f0 [<ffffffff902f907c>] xfs_attr_set+0x1fc/0x4d0 [<ffffffff9035198c>] xfs_xattr_set+0x5c/0xa0 [<ffffffff901fa567>] generic_setxattr+0x67/0x80 [<ffffffff901fae52>] __vfs_setxattr_noperm+0x52/0xd0 [<ffffffff901faf77>] vfs_setxattr+0xa7/0xb0 [<ffffffff901fb0a8>] setxattr+0x128/0x200 [<ffffffff901fb47d>] SyS_fsetxattr+0x7d/0xa0 [<ffffffff906e7685>] entry_SYSCALL_64_fastpath+0x1e/0xb6 DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xb6 Leftover inexact backtrace: [2544108.763689] Stefan -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
