On Sat, Sep 01, 2012 at 01:00:05AM +0000, James Harper wrote: > I'm getting a freeze and instability (see logs following this email) on my > system using bcache, and I suspect it might be due to lvm snapshots. > > Basically, I'm doing a restore of windows machines using Backup Exec inside > Xen (customer test restore), and it has been giving me trouble (for reasons > unrelated to bcache) and instead of rebuilding the restore machine every time > I attempt the restore I wanted to build it up then take a snapshot so I could > roll it back easily. > > My setup is: > sd[ab] > md (RAID1) > bcache > lvm > lvm snapshot > > with my Xen DomU using the snapshot. Before I started using the snapshot it > appeared to be working just fine in terms of problems at the Dom0 level. I > guess I'll have to run it not using the snapshot to prove it, but there is a > bit of effort required to get the DomU to the point where it is now so I'd > like to find a solution. > > On one occasion the Dom0 was still kind of usable and I could log in and > force a reboot using sysrq-trigger. This time it has just hung completely. > > Any suggestions? Anything in the following logs to suggest that bcache isn't > involved and I'm chasing the wrong problem?
Hmm. If it's related to lvm snapshots, there's a workaround I just added to the bcache-3.2 branch - I'd give that a try, looks plausible from your log. > > Thanks > > James > > [ 2044.256047] INFO: task kworker/u:5:186 blocked for more than 120 seconds. > [ 2044.256080] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2044.256112] kworker/u:5 D ffff8803ebc13740 0 186 2 > 0x00000000 > [ 2044.256116] ffff88038e6df0e0 0000000000000246 ffff88030acfe7c8 > ffff8803bb3ee870 > [ 2044.256120] 0000000000013740 ffff8803bbb71fd8 ffff8803bbb71fd8 > ffff8803bb3ee870 > [ 2044.256123] 0000000000000000 ffffffff81070283 ffffffff81348743 > ffff8803b9510ab0 > [ 2044.256127] Call Trace: > [ 2044.256134] [<ffffffff81070283>] ? arch_local_irq_disable+0x7/0x8 > [ 2044.256139] [<ffffffff81348743>] ? _raw_spin_lock_irqsave+0x14/0x35 > [ 2044.256143] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2044.256147] [<ffffffff81191747>] ? elv_merged_request+0x1f/0x43 > [ 2044.256152] [<ffffffff811b1103>] ? call_rwsem_down_write_failed+0x13/0x20 > [ 2044.256155] [<ffffffff81347ee9>] ? down_write+0x25/0x27 > [ 2044.256168] [<ffffffffa01919e9>] ? refill_dirty+0x5d/0x1e6 [bcache] > [ 2044.256174] [<ffffffffa0191e81>] ? read_dirty+0x30f/0x35b [bcache] > [ 2044.256178] [<ffffffff810e8a23>] ? arch_local_irq_restore+0x7/0x8 > [ 2044.256184] [<ffffffffa0191b72>] ? refill_dirty+0x1e6/0x1e6 [bcache] > [ 2044.256187] [<ffffffff8105abc9>] ? process_one_work+0x125/0x296 > [ 2044.256190] [<ffffffff8105b995>] ? worker_thread+0xc4/0x164 > [ 2044.256193] [<ffffffff8105b8d1>] ? manage_workers.isra.22+0x160/0x160 > [ 2044.256196] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2044.256199] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2044.256202] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2044.256205] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2044.256208] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2044.256213] INFO: task flush-252:0:881 blocked for more than 120 seconds. > [ 2044.256236] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2044.256265] flush-252:0 D ffff8803ebc93740 0 881 2 > 0x00000000 > [ 2044.256268] ffff8803d4830080 0000000000000246 000000000000000f > ffff8803d4830e60 > [ 2044.256271] 0000000000013740 ffff8803ceba9fd8 ffff8803ceba9fd8 > ffff8803d4830e60 > [ 2044.256274] 0000000000000008 ffff8803bae9f858 ffffffff810ea17f > ffff8803b9510ab0 > [ 2044.256277] Call Trace: > [ 2044.256281] [<ffffffff810ea17f>] ? ____cache_alloc+0xb1/0x1f7 > [ 2044.256284] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2044.256287] [<ffffffff811b10d4>] ? call_rwsem_down_read_failed+0x14/0x30 > [ 2044.256290] [<ffffffff81347ec2>] ? down_read+0x17/0x19 > [ 2044.256296] [<ffffffffa0194924>] ? request_write+0x7c/0x2a9 [bcache] > [ 2044.256299] [<ffffffff81196c93>] ? generic_make_request+0x14e/0x19e > [ 2044.256302] [<ffffffff81196db7>] ? submit_bio+0xd4/0x100 > [ 2044.256305] [<ffffffff8111ea89>] ? bio_alloc_bioset+0x45/0xc7 > [ 2044.256309] [<ffffffff8111b40f>] ? submit_bh+0xde/0xf9 > [ 2044.256313] [<ffffffff8111d47b>] ? __block_write_full_page+0x1f7/0x2ed > [ 2044.256315] [<ffffffff8111b6a0>] ? drop_buffers+0x8f/0x8f > [ 2044.256318] [<ffffffff811203e5>] ? blkdev_get_blocks+0x85/0x85 > [ 2044.256322] [<ffffffff810ba39d>] ? __writepage+0xa/0x21 > [ 2044.256325] [<ffffffff810bac73>] ? write_cache_pages+0x1d3/0x2e4 > [ 2044.256328] [<ffffffff810ba393>] ? page_index+0x14/0x14 > [ 2044.256331] [<ffffffff810badbc>] ? generic_writepages+0x38/0x54 > [ 2044.256334] [<ffffffff8111602b>] ? writeback_single_inode+0x119/0x2c7 > [ 2044.256339] [<ffffffff81007241>] ? get_phys_to_machine+0x12/0x5d > [ 2044.256341] [<ffffffff81116499>] ? writeback_sb_inodes+0x14e/0x200 > [ 2044.256344] [<ffffffff810040fa>] ? xen_mc_flush+0x11d/0x160 > [ 2044.256347] [<ffffffff811165b4>] ? __writeback_inodes_wb+0x69/0xab > [ 2044.256349] [<ffffffff8111670a>] ? wb_writeback+0x114/0x24f > [ 2044.256352] [<ffffffff81348743>] ? _raw_spin_lock_irqsave+0x14/0x35 > [ 2044.256355] [<ffffffff81116b60>] ? wb_do_writeback+0x146/0x1bb > [ 2044.256359] [<ffffffff81051acc>] ? del_timer_sync+0x32/0x3c > [ 2044.256361] [<ffffffff81116c74>] ? bdi_writeback_thread+0x9f/0x1ee > [ 2044.256364] [<ffffffff81116bd5>] ? wb_do_writeback+0x1bb/0x1bb > [ 2044.256367] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2044.256369] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2044.256372] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2044.256374] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2044.256377] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2044.256388] INFO: task blkback.2.hda:5686 blocked for more than 120 > seconds. > [ 2044.256412] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2044.256441] blkback.2.hda D ffff8803ebc13740 0 5686 2 > 0x00000000 > [ 2044.256444] ffff8803d6752340 0000000000000246 ffffffff8103b30f > ffff88038e6de9f0 > [ 2044.256447] 0000000000013740 ffff8803c1759fd8 ffff8803c1759fd8 > ffff88038e6de9f0 > [ 2044.256450] ffffffff8103f12c ffff8803ebc1b900 ffff8803bbfa9540 > ffff8803b9510ab0 > [ 2044.256453] Call Trace: > [ 2044.256457] [<ffffffff8103b30f>] ? ttwu_do_wakeup+0x2d/0xd2 > [ 2044.256461] [<ffffffff8103f12c>] ? try_to_wake_up+0x171/0x181 > [ 2044.256464] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2044.256467] [<ffffffff811b10d4>] ? call_rwsem_down_read_failed+0x14/0x30 > [ 2044.256470] [<ffffffff81347ec2>] ? down_read+0x17/0x19 > [ 2044.256476] [<ffffffffa0194924>] ? request_write+0x7c/0x2a9 [bcache] > [ 2044.256478] [<ffffffff81196c93>] ? generic_make_request+0x14e/0x19e > [ 2044.256481] [<ffffffff81196db7>] ? submit_bio+0xd4/0x100 > [ 2044.256484] [<ffffffffa03a3a46>] ? dispatch_rw_block_io+0x48a/0x525 > [xen_blkback] > [ 2044.256488] [<ffffffff81007241>] ? get_phys_to_machine+0x12/0x5d > [ 2044.256490] [<ffffffff810047ad>] ? pfn_to_mfn+0x13/0x29 > [ 2044.256493] [<ffffffff81003125>] ? xen_end_context_switch+0xe/0x1c > [ 2044.256496] [<ffffffff810037cd>] ? xen_mc_issue.constprop.23+0x10/0x4d > [ 2044.256499] [<ffffffff8100d02f>] ? load_TLS+0x7/0xa > [ 2044.256502] [<ffffffff8100d68f>] ? __switch_to+0x141/0x25e > [ 2044.256505] [<ffffffff8103bc3c>] ? pick_next_task_fair+0xfd/0x111 > [ 2044.256508] [<ffffffffa03a3cea>] ? __do_block_io_op+0x209/0x236 > [xen_blkback] > [ 2044.256512] [<ffffffffa03a4021>] ? xen_blkif_schedule+0x2e2/0x3d9 > [xen_blkback] > [ 2044.256515] [<ffffffff8105f187>] ? abort_exclusive_wait+0x79/0x79 > [ 2044.256518] [<ffffffffa03a3d3f>] ? xen_blkif_be_int+0x28/0x28 > [xen_blkback] > [ 2044.256521] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2044.256523] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2044.256526] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2044.256529] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2044.256532] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2044.256535] INFO: task blkback.3.hda:6241 blocked for more than 120 > seconds. > [ 2044.256559] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2044.256587] blkback.3.hda D ffff8803ebc13740 0 6241 2 > 0x00000000 > [ 2044.256590] ffffffff8160d020 0000000000000246 000000000000000f > ffff88038e17aa70 > [ 2044.256594] 0000000000013740 ffff880309891fd8 ffff880309891fd8 > ffff88038e17aa70 > [ 2044.256597] 0000000000000008 ffff8803bae9f858 0000000000000000 > ffff8803b9510ab0 > [ 2044.256600] Call Trace: > [ 2044.256603] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2044.256606] [<ffffffff811b10d4>] ? call_rwsem_down_read_failed+0x14/0x30 > [ 2044.256609] [<ffffffff81347ec2>] ? down_read+0x17/0x19 > [ 2044.256615] [<ffffffffa0194924>] ? request_write+0x7c/0x2a9 [bcache] > [ 2044.256618] [<ffffffff81196c93>] ? generic_make_request+0x14e/0x19e > [ 2044.256620] [<ffffffff81196db7>] ? submit_bio+0xd4/0x100 > [ 2044.256623] [<ffffffffa03a3a46>] ? dispatch_rw_block_io+0x48a/0x525 > [xen_blkback] > [ 2044.256627] [<ffffffff81007241>] ? get_phys_to_machine+0x12/0x5d > [ 2044.256629] [<ffffffff810047ad>] ? pfn_to_mfn+0x13/0x29 > [ 2044.256632] [<ffffffff81003f5f>] ? arch_local_irq_restore+0x7/0x8 > [ 2044.256634] [<ffffffff810040fa>] ? xen_mc_flush+0x11d/0x160 > [ 2044.256637] [<ffffffff81003125>] ? xen_end_context_switch+0xe/0x1c > [ 2044.256639] [<ffffffff810037cd>] ? xen_mc_issue.constprop.23+0x10/0x4d > [ 2044.256642] [<ffffffff8100d02f>] ? load_TLS+0x7/0xa > [ 2044.256645] [<ffffffff8100d68f>] ? __switch_to+0x141/0x25e > [ 2044.256647] [<ffffffff8103bc3c>] ? pick_next_task_fair+0xfd/0x111 > [ 2044.256651] [<ffffffffa03a3cea>] ? __do_block_io_op+0x209/0x236 > [xen_blkback] > [ 2044.256654] [<ffffffffa03a4021>] ? xen_blkif_schedule+0x2e2/0x3d9 > [xen_blkback] > [ 2044.256657] [<ffffffff8105f187>] ? abort_exclusive_wait+0x79/0x79 > [ 2044.256660] [<ffffffffa03a3d3f>] ? xen_blkif_be_int+0x28/0x28 > [xen_blkback] > [ 2044.256663] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2044.256665] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2044.256668] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2044.256671] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2044.256673] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2044.256676] INFO: task kworker/0:1:6250 blocked for more than 120 seconds. > [ 2044.256699] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2044.256728] kworker/0:1 D ffff8803ebc13740 0 6250 2 > 0x00000000 > [ 2044.256731] ffff8803d6752340 0000000000000246 000000000000000f > ffff8803bbadca30 > [ 2044.256734] 0000000000013740 ffff8803d74f7fd8 ffff8803d74f7fd8 > ffff8803bbadca30 > [ 2044.256737] 0000000000000008 ffff8803bae9f858 0000000000000000 > ffff8803b9510ab0 > [ 2044.256740] Call Trace: > [ 2044.256743] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2044.256747] [<ffffffff811b10d4>] ? call_rwsem_down_read_failed+0x14/0x30 > [ 2044.256750] [<ffffffff81347ec2>] ? down_read+0x17/0x19 > [ 2044.256755] [<ffffffffa0194924>] ? request_write+0x7c/0x2a9 [bcache] > [ 2044.256758] [<ffffffff81196c93>] ? generic_make_request+0x14e/0x19e > [ 2044.256761] [<ffffffff81196db7>] ? submit_bio+0xd4/0x100 > [ 2044.256766] [<ffffffffa01bc4e0>] ? dispatch_io+0x1b3/0x1ee [dm_mod] > [ 2044.256771] [<ffffffffa01bc22a>] ? km_next_page+0x17/0x17 [dm_mod] > [ 2044.256776] [<ffffffffa01bc1fc>] ? bvec_next_page+0x6/0x6 [dm_mod] > [ 2044.256781] [<ffffffffa01bc5b1>] ? sync_io+0x96/0x117 [dm_mod] > [ 2044.256786] [<ffffffff811a7bd7>] ? cpumask_next_and+0x2a/0x36 > [ 2044.256791] [<ffffffffa01bc720>] ? dm_io+0xee/0x1b0 [dm_mod] > [ 2044.256795] [<ffffffffa01bc22a>] ? km_next_page+0x17/0x17 [dm_mod] > [ 2044.256800] [<ffffffffa01bc1fc>] ? bvec_next_page+0x6/0x6 [dm_mod] > [ 2044.256805] [<ffffffffa028f863>] ? chunk_io+0x8d/0xf0 [dm_snapshot] > [ 2044.256808] [<ffffffff810b8008>] ? get_pageblock_flags_group+0x3e/0x72 > [ 2044.256811] [<ffffffffa028f029>] ? copy_callback+0x38/0x38 [dm_snapshot] > [ 2044.256815] [<ffffffffa028fcf8>] ? persistent_commit_exception+0xaa/0x107 > [dm_snapshot] > [ 2044.256819] [<ffffffffa028eff1>] ? pending_complete+0x1c4/0x1c4 > [dm_snapshot] > [ 2044.256825] [<ffffffffa01bd20a>] ? run_complete_job+0x66/0x95 [dm_mod] > [ 2044.256830] [<ffffffffa01bd1a4>] ? do_work+0x5d/0x5d [dm_mod] > [ 2044.256834] [<ffffffffa01bd07b>] ? process_jobs+0x24/0xf0 [dm_mod] > [ 2044.256839] [<ffffffffa01bd147>] ? process_jobs+0xf0/0xf0 [dm_mod] > [ 2044.256844] [<ffffffffa01bd16f>] ? do_work+0x28/0x5d [dm_mod] > [ 2044.256847] [<ffffffff81070283>] ? arch_local_irq_disable+0x7/0x8 > [ 2044.256849] [<ffffffff8105abc9>] ? process_one_work+0x125/0x296 > [ 2044.256852] [<ffffffff8105b995>] ? worker_thread+0xc4/0x164 > [ 2044.256854] [<ffffffff8105b8d1>] ? manage_workers.isra.22+0x160/0x160 > [ 2044.256857] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2044.256860] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2044.256863] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2044.256865] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2044.256868] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2164.256009] INFO: task kworker/u:5:186 blocked for more than 120 seconds. > [ 2164.256037] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2164.256066] kworker/u:5 D ffff8803ebc13740 0 186 2 > 0x00000000 > [ 2164.256070] ffff88038e6df0e0 0000000000000246 ffff88030acfe7c8 > ffff8803bb3ee870 > [ 2164.256074] 0000000000013740 ffff8803bbb71fd8 ffff8803bbb71fd8 > ffff8803bb3ee870 > [ 2164.256077] 0000000000000000 ffffffff81070283 ffffffff81348743 > ffff8803b9510ab0 > [ 2164.256081] Call Trace: > [ 2164.256088] [<ffffffff81070283>] ? arch_local_irq_disable+0x7/0x8 > [ 2164.256094] [<ffffffff81348743>] ? _raw_spin_lock_irqsave+0x14/0x35 > [ 2164.256097] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2164.256102] [<ffffffff81191747>] ? elv_merged_request+0x1f/0x43 > [ 2164.256106] [<ffffffff811b1103>] ? call_rwsem_down_write_failed+0x13/0x20 > [ 2164.256109] [<ffffffff81347ee9>] ? down_write+0x25/0x27 > [ 2164.256123] [<ffffffffa01919e9>] ? refill_dirty+0x5d/0x1e6 [bcache] > [ 2164.256129] [<ffffffffa0191e81>] ? read_dirty+0x30f/0x35b [bcache] > [ 2164.256132] [<ffffffff810e8a23>] ? arch_local_irq_restore+0x7/0x8 > [ 2164.256138] [<ffffffffa0191b72>] ? refill_dirty+0x1e6/0x1e6 [bcache] > [ 2164.256142] [<ffffffff8105abc9>] ? process_one_work+0x125/0x296 > [ 2164.256144] [<ffffffff8105b995>] ? worker_thread+0xc4/0x164 > [ 2164.256147] [<ffffffff8105b8d1>] ? manage_workers.isra.22+0x160/0x160 > [ 2164.256150] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2164.256153] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2164.256157] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2164.256159] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2164.256162] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2164.256167] INFO: task kjournald:314 blocked for more than 120 seconds. > [ 2164.256189] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2164.256250] kjournald D ffff8803ebc13740 0 314 2 > 0x00000000 > [ 2164.256253] ffffffff8160d020 0000000000000246 ffff8803bbd02ea8 > ffff8803bbd02af0 > [ 2164.256256] 0000000000013740 ffff8803b7c0dfd8 ffff8803b7c0dfd8 > ffff8803bbd02af0 > [ 2164.256259] ffffffff81348743 0000000000000200 ffffffff8107027b > ffff8803099082c0 > [ 2164.256262] Call Trace: > [ 2164.256265] [<ffffffff81348743>] ? _raw_spin_lock_irqsave+0x14/0x35 > [ 2164.256268] [<ffffffff8107027b>] ? arch_local_irq_restore+0x7/0x8 > [ 2164.256273] [<ffffffffa01d2d26>] ? journal_commit_transaction+0x148/0xe4e > [jbd] > [ 2164.256277] [<ffffffff8100d02f>] ? load_TLS+0x7/0xa > [ 2164.256281] [<ffffffff8103bc3c>] ? pick_next_task_fair+0xfd/0x111 > [ 2164.256284] [<ffffffff81038470>] ? mmdrop+0xd/0x1c > [ 2164.256287] [<ffffffff8103a5cf>] ? finish_task_switch+0x7e/0xad > [ 2164.256290] [<ffffffff8105f187>] ? abort_exclusive_wait+0x79/0x79 > [ 2164.256293] [<ffffffff8107027b>] ? arch_local_irq_restore+0x7/0x8 > [ 2164.256296] [<ffffffff81348743>] ? _raw_spin_lock_irqsave+0x14/0x35 > [ 2164.256301] [<ffffffffa01d6bf2>] ? kjournald+0xe1/0x235 [jbd] > [ 2164.256304] [<ffffffff8105f187>] ? abort_exclusive_wait+0x79/0x79 > [ 2164.256309] [<ffffffffa01d6b11>] ? journal_init_dev+0xef/0xef [jbd] > [ 2164.256312] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2164.256314] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2164.256317] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2164.256319] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2164.256322] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2164.256324] INFO: task flush-252:0:881 blocked for more than 120 seconds. > [ 2164.256379] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2164.256464] flush-252:0 D ffff8803ebc93740 0 881 2 > 0x00000000 > [ 2164.256467] ffff8803d4830080 0000000000000246 000000000000000f > ffff8803d4830e60 > [ 2164.256470] 0000000000013740 ffff8803ceba9fd8 ffff8803ceba9fd8 > ffff8803d4830e60 > [ 2164.256473] 0000000000000008 ffff8803bae9f858 ffffffff810ea17f > ffff8803b9510ab0 > [ 2164.256476] Call Trace: > [ 2164.256479] [<ffffffff810ea17f>] ? ____cache_alloc+0xb1/0x1f7 > [ 2164.256482] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2164.256486] [<ffffffff811b10d4>] ? call_rwsem_down_read_failed+0x14/0x30 > [ 2164.256489] [<ffffffff81347ec2>] ? down_read+0x17/0x19 > [ 2164.256496] [<ffffffffa0194924>] ? request_write+0x7c/0x2a9 [bcache] > [ 2164.256504] [<ffffffff81196c93>] ? generic_make_request+0x14e/0x19e > [ 2164.256507] [<ffffffff81196db7>] ? submit_bio+0xd4/0x100 > [ 2164.256510] [<ffffffff8111ea89>] ? bio_alloc_bioset+0x45/0xc7 > [ 2164.256515] [<ffffffff8111b40f>] ? submit_bh+0xde/0xf9 > [ 2164.256518] [<ffffffff8111d47b>] ? __block_write_full_page+0x1f7/0x2ed > [ 2164.256521] [<ffffffff8111b6a0>] ? drop_buffers+0x8f/0x8f > [ 2164.256523] [<ffffffff811203e5>] ? blkdev_get_blocks+0x85/0x85 > [ 2164.256527] [<ffffffff810ba39d>] ? __writepage+0xa/0x21 > [ 2164.256530] [<ffffffff810bac73>] ? write_cache_pages+0x1d3/0x2e4 > [ 2164.256533] [<ffffffff810ba393>] ? page_index+0x14/0x14 > [ 2164.256536] [<ffffffff810badbc>] ? generic_writepages+0x38/0x54 > [ 2164.256539] [<ffffffff8111602b>] ? writeback_single_inode+0x119/0x2c7 > [ 2164.256543] [<ffffffff81007241>] ? get_phys_to_machine+0x12/0x5d > [ 2164.256546] [<ffffffff81116499>] ? writeback_sb_inodes+0x14e/0x200 > [ 2164.256548] [<ffffffff810040fa>] ? xen_mc_flush+0x11d/0x160 > [ 2164.256551] [<ffffffff811165b4>] ? __writeback_inodes_wb+0x69/0xab > [ 2164.256554] [<ffffffff8111670a>] ? wb_writeback+0x114/0x24f > [ 2164.256557] [<ffffffff81348743>] ? _raw_spin_lock_irqsave+0x14/0x35 > [ 2164.256559] [<ffffffff81116b60>] ? wb_do_writeback+0x146/0x1bb > [ 2164.256563] [<ffffffff81051acc>] ? del_timer_sync+0x32/0x3c > [ 2164.256565] [<ffffffff81116c74>] ? bdi_writeback_thread+0x9f/0x1ee > [ 2164.256568] [<ffffffff81116bd5>] ? wb_do_writeback+0x1bb/0x1bb > [ 2164.256571] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2164.256573] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2164.256576] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2164.256578] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2164.256581] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2164.256591] INFO: task blkback.2.hda:5686 blocked for more than 120 > seconds. > [ 2164.256647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2164.256732] blkback.2.hda D ffff8803ebc13740 0 5686 2 > 0x00000000 > [ 2164.256735] ffff8803d6752340 0000000000000246 ffffffff8103b30f > ffff88038e6de9f0 > [ 2164.256738] 0000000000013740 ffff8803c1759fd8 ffff8803c1759fd8 > ffff88038e6de9f0 > [ 2164.256741] ffffffff8103f12c ffff8803ebc1b900 ffff8803bbfa9540 > ffff8803b9510ab0 > [ 2164.256744] Call Trace: > [ 2164.256747] [<ffffffff8103b30f>] ? ttwu_do_wakeup+0x2d/0xd2 > [ 2164.256750] [<ffffffff8103f12c>] ? try_to_wake_up+0x171/0x181 > [ 2164.256753] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2164.256757] [<ffffffff811b10d4>] ? call_rwsem_down_read_failed+0x14/0x30 > [ 2164.256760] [<ffffffff81347ec2>] ? down_read+0x17/0x19 > [ 2164.256766] [<ffffffffa0194924>] ? request_write+0x7c/0x2a9 [bcache] > [ 2164.256768] [<ffffffff81196c93>] ? generic_make_request+0x14e/0x19e > [ 2164.256771] [<ffffffff81196db7>] ? submit_bio+0xd4/0x100 > [ 2164.256774] [<ffffffffa03a3a46>] ? dispatch_rw_block_io+0x48a/0x525 > [xen_blkback] > [ 2164.256778] [<ffffffff81007241>] ? get_phys_to_machine+0x12/0x5d > [ 2164.256781] [<ffffffff810047ad>] ? pfn_to_mfn+0x13/0x29 > [ 2164.256784] [<ffffffff81003125>] ? xen_end_context_switch+0xe/0x1c > [ 2164.256786] [<ffffffff810037cd>] ? xen_mc_issue.constprop.23+0x10/0x4d > [ 2164.256789] [<ffffffff8100d02f>] ? load_TLS+0x7/0xa > [ 2164.256792] [<ffffffff8100d68f>] ? __switch_to+0x141/0x25e > [ 2164.256795] [<ffffffff8103bc3c>] ? pick_next_task_fair+0xfd/0x111 > [ 2164.256798] [<ffffffffa03a3cea>] ? __do_block_io_op+0x209/0x236 > [xen_blkback] > [ 2164.256801] [<ffffffffa03a4021>] ? xen_blkif_schedule+0x2e2/0x3d9 > [xen_blkback] > [ 2164.256804] [<ffffffff8105f187>] ? abort_exclusive_wait+0x79/0x79 > [ 2164.256807] [<ffffffffa03a3d3f>] ? xen_blkif_be_int+0x28/0x28 > [xen_blkback] > [ 2164.256810] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2164.256813] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2164.256816] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2164.256818] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2164.256821] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > [ 2164.256824] INFO: task blkback.3.hda:6241 blocked for more than 120 > seconds. > [ 2164.256880] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > this message. > [ 2164.256965] blkback.3.hda D ffff8803ebc13740 0 6241 2 > 0x00000000 > [ 2164.256968] ffffffff8160d020 0000000000000246 000000000000000f > ffff88038e17aa70 > [ 2164.256971] 0000000000013740 ffff880309891fd8 ffff880309891fd8 > ffff88038e17aa70 > [ 2164.256974] 0000000000000008 ffff8803bae9f858 0000000000000000 > ffff8803b9510ab0 > [ 2164.256977] Call Trace: > [ 2164.256980] [<ffffffff8134853c>] ? rwsem_down_failed_common+0xdc/0x110 > [ 2164.256984] [<ffffffff811b10d4>] ? call_rwsem_down_read_failed+0x14/0x30 > [ 2164.256987] [<ffffffff81347ec2>] ? down_read+0x17/0x19 > [ 2164.256993] [<ffffffffa0194924>] ? request_write+0x7c/0x2a9 [bcache] > [ 2164.256995] [<ffffffff81196c93>] ? generic_make_request+0x14e/0x19e > [ 2164.256998] [<ffffffff81196db7>] ? submit_bio+0xd4/0x100 > [ 2164.257001] [<ffffffffa03a3a46>] ? dispatch_rw_block_io+0x48a/0x525 > [xen_blkback] > [ 2164.257004] [<ffffffff81007241>] ? get_phys_to_machine+0x12/0x5d > [ 2164.257007] [<ffffffff810047ad>] ? pfn_to_mfn+0x13/0x29 > [ 2164.257009] [<ffffffff81003f5f>] ? arch_local_irq_restore+0x7/0x8 > [ 2164.257012] [<ffffffff810040fa>] ? xen_mc_flush+0x11d/0x160 > [ 2164.257015] [<ffffffff81003125>] ? xen_end_context_switch+0xe/0x1c > [ 2164.257017] [<ffffffff810037cd>] ? xen_mc_issue.constprop.23+0x10/0x4d > [ 2164.257020] [<ffffffff8100d02f>] ? load_TLS+0x7/0xa > [ 2164.257022] [<ffffffff8100d68f>] ? __switch_to+0x141/0x25e > [ 2164.257025] [<ffffffff8103bc3c>] ? pick_next_task_fair+0xfd/0x111 > [ 2164.257028] [<ffffffffa03a3cea>] ? __do_block_io_op+0x209/0x236 > [xen_blkback] > [ 2164.257032] [<ffffffffa03a4021>] ? xen_blkif_schedule+0x2e2/0x3d9 > [xen_blkback] > [ 2164.257035] [<ffffffff8105f187>] ? abort_exclusive_wait+0x79/0x79 > [ 2164.257038] [<ffffffffa03a3d3f>] ? xen_blkif_be_int+0x28/0x28 > [xen_blkback] > [ 2164.257041] [<ffffffff8105ec54>] ? kthread+0x76/0x7e > [ 2164.257043] [<ffffffff8134f834>] ? kernel_thread_helper+0x4/0x10 > [ 2164.257046] [<ffffffff8134d8f3>] ? int_ret_from_sys_call+0x7/0x1b > [ 2164.257048] [<ffffffff813488fc>] ? retint_restore_args+0x5/0x6 > [ 2164.257051] [<ffffffff8134f830>] ? gs_change+0x13/0x13 > -- > To unsubscribe from this list: send the line "unsubscribe linux-bcache" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-bcache" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
