fscache (and XFS?) issues

log

Mar 14 02:54:27 ahdin kernel: [50128.106275] INFO: task steam.exe:20809 blocked for more than 120 seconds.
Mar 14 02:54:27 ahdin kernel: [50128.106288]       Tainted: P           OE 3.16.0-31-generic #41~14.04.1-Ubuntu
Mar 14 02:54:27 ahdin kernel: [50128.106293] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 14 02:54:27 ahdin kernel: [50128.106298] steam.exe       D ffff88031fc93440     0 20809   2351 0x20020000
Mar 14 02:54:27 ahdin kernel: [50128.106308]  ffff8802b6fdb8a8 0000000000200082 ffff880097a45180 ffff8802b6fdbfd8
Mar 14 02:54:27 ahdin kernel: [50128.106316]  0000000000013440 0000000000013440 ffff8802217adbb0 ffff880097a45180
Mar 14 02:54:27 ahdin kernel: [50128.106323]  ffff8802c0e2b4b8 ffff8802c0e2b4d0 ffffffffc0470b62 ffffea000597ec80
Mar 14 02:54:27 ahdin kernel: [50128.106330] Call Trace:
Mar 14 02:54:27 ahdin kernel: [50128.106419]  [<ffffffffc0470b62>] ? xfs_vm_bmap+0x32/0xa0 [xfs]
Mar 14 02:54:27 ahdin kernel: [50128.106434]  [<ffffffff817675c9>] schedule+0x29/0x70
Mar 14 02:54:27 ahdin kernel: [50128.106443]  [<ffffffff8176a605>] rwsem_down_read_failed+0xf5/0x150
Mar 14 02:54:27 ahdin kernel: [50128.106452]  [<ffffffff81393544>] call_rwsem_down_read_failed+0x14/0x30
Mar 14 02:54:27 ahdin kernel: [50128.106459]  [<ffffffff81769c60>] ? down_read+0x20/0x30
Mar 14 02:54:27 ahdin kernel: [50128.106531]  [<ffffffffc04c12e4>] xfs_ilock+0xd4/0xe0 [xfs]
Mar 14 02:54:27 ahdin kernel: [50128.106585]  [<ffffffffc0470b62>] xfs_vm_bmap+0x32/0xa0 [xfs]
Mar 14 02:54:27 ahdin kernel: [50128.106598]  [<ffffffffc124063f>] cachefiles_read_or_alloc_pages+0x1df/0x9d0 [cachefiles]
Mar 14 02:54:27 ahdin kernel: [50128.106607]  [<ffffffff810b4925>] ? wake_up_bit+0x25/0x30
Mar 14 02:54:27 ahdin kernel: [50128.106628]  [<ffffffffc0555232>] ? fscache_run_op.isra.4+0x52/0x90 [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.106645]  [<ffffffffc05557d5>] ? fscache_submit_op+0x145/0x4a0 [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.106683]  [<ffffffffc0625a00>] ? nfs_fscache_can_enable+0x20/0x20 [nfs]
Mar 14 02:54:27 ahdin kernel: [50128.106703]  [<ffffffffc0557789>] __fscache_read_or_alloc_pages+0x1e9/0x350 [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.106737]  [<ffffffffc0626364>] __nfs_readpages_from_fscache+0x74/0x1b0 [nfs]
Mar 14 02:54:27 ahdin kernel: [50128.106770]  [<ffffffffc061dc48>] nfs_readpages+0xa8/0x180 [nfs]
Mar 14 02:54:27 ahdin kernel: [50128.106778]  [<ffffffff811abe74>] ? alloc_pages_current+0xa4/0x170
Mar 14 02:54:27 ahdin kernel: [50128.106787]  [<ffffffff81161977>] ? __page_cache_alloc+0x97/0xb0
Mar 14 02:54:27 ahdin kernel: [50128.106795]  [<ffffffff8116db0b>] __do_page_cache_readahead+0x18b/0x210
Mar 14 02:54:27 ahdin kernel: [50128.106803]  [<ffffffff8116dcd8>] ondemand_readahead+0x148/0x280
Mar 14 02:54:27 ahdin kernel: [50128.106811]  [<ffffffff8116de90>] page_cache_async_readahead+0x80/0xa0
Mar 14 02:54:27 ahdin kernel: [50128.106818]  [<ffffffff811631d1>] generic_file_read_iter+0x3a1/0x5e0
Mar 14 02:54:27 ahdin kernel: [50128.106849]  [<ffffffffc06160c3>] ? nfs_revalidate_mapping+0x203/0x300 [nfs]
Mar 14 02:54:27 ahdin kernel: [50128.106877]  [<ffffffffc06126eb>] nfs_file_read+0x5b/0xc0 [nfs]
Mar 14 02:54:27 ahdin kernel: [50128.106886]  [<ffffffff811d36be>] new_sync_read+0x7e/0xb0
Mar 14 02:54:27 ahdin kernel: [50128.106895]  [<ffffffff811d3d98>] vfs_read+0x98/0x170
Mar 14 02:54:27 ahdin kernel: [50128.106902]  [<ffffffff811d4ba2>] SyS_pread64+0x72/0xb0
Mar 14 02:54:27 ahdin kernel: [50128.106910]  [<ffffffff8106561c>] sys32_pread+0x1c/0x20
Mar 14 02:54:27 ahdin kernel: [50128.106916]  [<ffffffff8176e08c>] cstar_dispatch+0x7/0x21
Mar 14 02:54:27 ahdin kernel: [50128.106933] INFO: task kworker/u12:5:21118 blocked for more than 120 seconds.
Mar 14 02:54:27 ahdin kernel: [50128.106939]       Tainted: P           OE 3.16.0-31-generic #41~14.04.1-Ubuntu
Mar 14 02:54:27 ahdin kernel: [50128.106943] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 14 02:54:27 ahdin kernel: [50128.106946] kworker/u12:5   D ffff88031fc13440     0 21118      2 0x00000000
Mar 14 02:54:27 ahdin kernel: [50128.106969] Workqueue: fscache_operation fscache_op_work_func [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.106973]  ffff8801f1c73358 0000000000000046 ffff88025ded5180 ffff8801f1c73fd8
Mar 14 02:54:27 ahdin kernel: [50128.106980]  0000000000013440 0000000000013440 ffffffff81c1a480 ffff8800c39b9090
Mar 14 02:54:27 ahdin kernel: [50128.106986]  ffffea000404c6c0 ffff88031ffd9e98 ffff8800c39b9058 ffff8800c39b9068
Mar 14 02:54:27 ahdin kernel: [50128.106992] Call Trace:
Mar 14 02:54:27 ahdin kernel: [50128.106999]  [<ffffffff817675c9>] schedule+0x29/0x70
Mar 14 02:54:27 ahdin kernel: [50128.107018]  [<ffffffffc055621d>] __fscache_wait_on_page_write+0x5d/0xa0 [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.107026]  [<ffffffff810b4d10>] ? prepare_to_wait_event+0x100/0x100
Mar 14 02:54:27 ahdin kernel: [50128.107044]  [<ffffffffc055650d>] __fscache_maybe_release_page+0x4d/0x190 [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.107077]  [<ffffffffc06260ae>] nfs_fscache_release_page+0x5e/0xc0 [nfs]
Mar 14 02:54:27 ahdin kernel: [50128.107110]  [<ffffffffc0621c21>] nfs_migrate_page+0x31/0x60 [nfs]
Mar 14 02:54:27 ahdin kernel: [50128.107118]  [<ffffffff811bc916>] move_to_new_page+0x76/0x210
Mar 14 02:54:27 ahdin kernel: [50128.107125]  [<ffffffff8119a573>] ? try_to_unmap+0x73/0xa0
Mar 14 02:54:27 ahdin kernel: [50128.107131]  [<ffffffff81199280>] ? try_to_unmap_nonlinear+0x570/0x570
Mar 14 02:54:27 ahdin kernel: [50128.107138]  [<ffffffff811bd298>] migrate_pages+0x6c8/0x7f0
Mar 14 02:54:27 ahdin kernel: [50128.107145]  [<ffffffff81183fa0>] ? isolate_freepages_block+0x340/0x340
Mar 14 02:54:27 ahdin kernel: [50128.107153]  [<ffffffff81183240>] ? s_show+0x40/0x40
Mar 14 02:54:27 ahdin kernel: [50128.107159]  [<ffffffff811851e0>] compact_zone+0x370/0x4c0
Mar 14 02:54:27 ahdin kernel: [50128.107165]  [<ffffffff811853be>] compact_zone_order+0x8e/0xd0
Mar 14 02:54:27 ahdin kernel: [50128.107172]  [<ffffffff811856a9>] try_to_compact_pages+0xf9/0x170
Mar 14 02:54:27 ahdin kernel: [50128.107181]  [<ffffffff8175cf25>] __alloc_pages_direct_compact+0xa5/0x199
Mar 14 02:54:27 ahdin kernel: [50128.107189]  [<ffffffff8175d729>] __alloc_pages_slowpath+0x710/0x775
Mar 14 02:54:27 ahdin kernel: [50128.107198]  [<ffffffff8116b523>] __alloc_pages_nodemask+0x273/0x2a0
Mar 14 02:54:27 ahdin kernel: [50128.107205]  [<ffffffff811abe74>] alloc_pages_current+0xa4/0x170
Mar 14 02:54:27 ahdin kernel: [50128.107213]  [<ffffffff811b694b>] new_slab+0x32b/0x410
Mar 14 02:54:27 ahdin kernel: [50128.107221]  [<ffffffff8175f56e>] __slab_alloc+0x2ab/0x43e
Mar 14 02:54:27 ahdin kernel: [50128.107230]  [<ffffffff8138a2e5>] ? __radix_tree_preload+0x35/0xa0
Mar 14 02:54:27 ahdin kernel: [50128.107238]  [<ffffffff811b72ab>] kmem_cache_alloc+0x18b/0x1e0
Mar 14 02:54:27 ahdin kernel: [50128.107246]  [<ffffffff8138a2e5>] ? __radix_tree_preload+0x35/0xa0
Mar 14 02:54:27 ahdin kernel: [50128.107254]  [<ffffffff8138a2e5>] __radix_tree_preload+0x35/0xa0
Mar 14 02:54:27 ahdin kernel: [50128.107262]  [<ffffffff8138a3a9>] radix_tree_maybe_preload+0x19/0x20
Mar 14 02:54:27 ahdin kernel: [50128.107269]  [<ffffffff8116213b>] __add_to_page_cache_locked+0x6b/0x240
Mar 14 02:54:27 ahdin kernel: [50128.107277]  [<ffffffff81162358>] add_to_page_cache_lru+0x28/0x80
Mar 14 02:54:27 ahdin kernel: [50128.107284]  [<ffffffff81162450>] pagecache_get_page+0xa0/0x1f0
Mar 14 02:54:27 ahdin kernel: [50128.107292]  [<ffffffff811625cf>] grab_cache_page_write_begin+0x2f/0x50
Mar 14 02:54:27 ahdin kernel: [50128.107346]  [<ffffffffc0470dd4>] xfs_vm_write_begin+0x34/0xe0 [xfs]
Mar 14 02:54:27 ahdin kernel: [50128.107400]  [<ffffffffc0470bf9>] ? xfs_vm_write_end+0x29/0x80 [xfs]
Mar 14 02:54:27 ahdin kernel: [50128.107407]  [<ffffffff81161625>] generic_perform_write+0xc5/0x1b0
Mar 14 02:54:27 ahdin kernel: [50128.107467]  [<ffffffffc047db03>] xfs_file_buffered_aio_write.isra.9+0x103/0x1c0 [xfs]
Mar 14 02:54:27 ahdin kernel: [50128.107524]  [<ffffffffc047dc43>] xfs_file_write_iter+0x83/0x130 [xfs]
Mar 14 02:54:27 ahdin kernel: [50128.107532]  [<ffffffff811d3771>] new_sync_write+0x81/0xb0
Mar 14 02:54:27 ahdin kernel: [50128.107545]  [<ffffffffc1241129>] cachefiles_write_page+0x149/0x300 [cachefiles]
Mar 14 02:54:27 ahdin kernel: [50128.107564]  [<ffffffffc0556d74>] fscache_write_op+0x154/0x250 [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.107581]  [<ffffffffc0556142>] fscache_op_work_func+0x22/0x50 [fscache]
Mar 14 02:54:27 ahdin kernel: [50128.107589]  [<ffffffff81089f32>] process_one_work+0x182/0x450
Mar 14 02:54:27 ahdin kernel: [50128.107595]  [<ffffffff8108a6a3>] worker_thread+0x123/0x5a0
Mar 14 02:54:27 ahdin kernel: [50128.107602]  [<ffffffff8108a580>] ? rescuer_thread+0x380/0x380
Mar 14 02:54:27 ahdin kernel: [50128.107609]  [<ffffffff81091312>] kthread+0xd2/0xf0
Mar 14 02:54:27 ahdin kernel: [50128.107617]  [<ffffffff81091240>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 14 02:54:27 ahdin kernel: [50128.107625]  [<ffffffff8176b5bc>] ret_from_fork+0x7c/0xb0
Mar 14 02:54:27 ahdin kernel: [50128.107632]  [<ffffffff81091240>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 14 02:56:27 ahdin kernel: [50248.029242] INFO: task steam.exe:20809 blocked for more than 120 seconds.
Mar 14 02:56:27 ahdin kernel: [50248.029254]       Tainted: P           OE 3.16.0-31-generic #41~14.04.1-Ubuntu
Mar 14 02:56:27 ahdin kernel: [50248.029259] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 14 02:56:27 ahdin kernel: [50248.029264] steam.exe       D ffff88031fc93440     0 20809   2351 0x20020000
Mar 14 02:56:27 ahdin kernel: [50248.029275]  ffff8802b6fdb8a8 0000000000200082 ffff880097a45180 ffff8802b6fdbfd8
Mar 14 02:56:27 ahdin kernel: [50248.029282]  0000000000013440 0000000000013440 ffff8802217adbb0 ffff880097a45180
Mar 14 02:56:27 ahdin kernel: [50248.029290]  ffff8802c0e2b4b8 ffff8802c0e2b4d0 ffffffffc0470b62 ffffea000597ec80
Mar 14 02:56:27 ahdin kernel: [50248.029296] Call Trace:
Mar 14 02:56:27 ahdin kernel: [50248.029386]  [<ffffffffc0470b62>] ? xfs_vm_bmap+0x32/0xa0 [xfs]
Mar 14 02:56:27 ahdin kernel: [50248.029397]  [<ffffffff817675c9>] schedule+0x29/0x70
Mar 14 02:56:27 ahdin kernel: [50248.029405]  [<ffffffff8176a605>] rwsem_down_read_failed+0xf5/0x150
Mar 14 02:56:27 ahdin kernel: [50248.029415]  [<ffffffff81393544>] call_rwsem_down_read_failed+0x14/0x30
Mar 14 02:56:27 ahdin kernel: [50248.029422]  [<ffffffff81769c60>] ? down_read+0x20/0x30
Mar 14 02:56:27 ahdin kernel: [50248.029493]  [<ffffffffc04c12e4>] xfs_ilock+0xd4/0xe0 [xfs]
Mar 14 02:56:27 ahdin kernel: [50248.029547]  [<ffffffffc0470b62>] xfs_vm_bmap+0x32/0xa0 [xfs]
Mar 14 02:56:27 ahdin kernel: [50248.029559]  [<ffffffffc124063f>] cachefiles_read_or_alloc_pages+0x1df/0x9d0 [cachefiles]
Mar 14 02:56:27 ahdin kernel: [50248.029569]  [<ffffffff810b4925>] ? wake_up_bit+0x25/0x30
Mar 14 02:56:27 ahdin kernel: [50248.029589]  [<ffffffffc0555232>] ? fscache_run_op.isra.4+0x52/0x90 [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.029606]  [<ffffffffc05557d5>] ? fscache_submit_op+0x145/0x4a0 [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.029644]  [<ffffffffc0625a00>] ? nfs_fscache_can_enable+0x20/0x20 [nfs]
Mar 14 02:56:27 ahdin kernel: [50248.029664]  [<ffffffffc0557789>] __fscache_read_or_alloc_pages+0x1e9/0x350 [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.029698]  [<ffffffffc0626364>] __nfs_readpages_from_fscache+0x74/0x1b0 [nfs]
Mar 14 02:56:27 ahdin kernel: [50248.029731]  [<ffffffffc061dc48>] nfs_readpages+0xa8/0x180 [nfs]
Mar 14 02:56:27 ahdin kernel: [50248.029739]  [<ffffffff811abe74>] ? alloc_pages_current+0xa4/0x170
Mar 14 02:56:27 ahdin kernel: [50248.029748]  [<ffffffff81161977>] ? __page_cache_alloc+0x97/0xb0
Mar 14 02:56:27 ahdin kernel: [50248.029756]  [<ffffffff8116db0b>] __do_page_cache_readahead+0x18b/0x210
Mar 14 02:56:27 ahdin kernel: [50248.029764]  [<ffffffff8116dcd8>] ondemand_readahead+0x148/0x280
Mar 14 02:56:27 ahdin kernel: [50248.029771]  [<ffffffff8116de90>] page_cache_async_readahead+0x80/0xa0
Mar 14 02:56:27 ahdin kernel: [50248.029779]  [<ffffffff811631d1>] generic_file_read_iter+0x3a1/0x5e0
Mar 14 02:56:27 ahdin kernel: [50248.029810]  [<ffffffffc06160c3>] ? nfs_revalidate_mapping+0x203/0x300 [nfs]
Mar 14 02:56:27 ahdin kernel: [50248.029838]  [<ffffffffc06126eb>] nfs_file_read+0x5b/0xc0 [nfs]
Mar 14 02:56:27 ahdin kernel: [50248.029846]  [<ffffffff811d36be>] new_sync_read+0x7e/0xb0
Mar 14 02:56:27 ahdin kernel: [50248.029854]  [<ffffffff811d3d98>] vfs_read+0x98/0x170
Mar 14 02:56:27 ahdin kernel: [50248.029862]  [<ffffffff811d4ba2>] SyS_pread64+0x72/0xb0
Mar 14 02:56:27 ahdin kernel: [50248.029870]  [<ffffffff8106561c>] sys32_pread+0x1c/0x20
Mar 14 02:56:27 ahdin kernel: [50248.029876]  [<ffffffff8176e08c>] cstar_dispatch+0x7/0x21
Mar 14 02:56:27 ahdin kernel: [50248.029892] INFO: task kworker/u12:5:21118 blocked for more than 120 seconds.
Mar 14 02:56:27 ahdin kernel: [50248.029897]       Tainted: P           OE 3.16.0-31-generic #41~14.04.1-Ubuntu
Mar 14 02:56:27 ahdin kernel: [50248.029901] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Mar 14 02:56:27 ahdin kernel: [50248.029904] kworker/u12:5   D ffff88031fc13440     0 21118      2 0x00000000
Mar 14 02:56:27 ahdin kernel: [50248.029926] Workqueue: fscache_operation fscache_op_work_func [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.029929]  ffff8801f1c73358 0000000000000046 ffff88025ded5180 ffff8801f1c73fd8
Mar 14 02:56:27 ahdin kernel: [50248.029936]  0000000000013440 0000000000013440 ffffffff81c1a480 ffff8800c39b9090
Mar 14 02:56:27 ahdin kernel: [50248.029942]  ffffea000404c6c0 ffff88031ffd9e98 ffff8800c39b9058 ffff8800c39b9068
Mar 14 02:56:27 ahdin kernel: [50248.029949] Call Trace:
Mar 14 02:56:27 ahdin kernel: [50248.029956]  [<ffffffff817675c9>] schedule+0x29/0x70
Mar 14 02:56:27 ahdin kernel: [50248.029974]  [<ffffffffc055621d>] __fscache_wait_on_page_write+0x5d/0xa0 [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.029982]  [<ffffffff810b4d10>] ? prepare_to_wait_event+0x100/0x100
Mar 14 02:56:27 ahdin kernel: [50248.030000]  [<ffffffffc055650d>] __fscache_maybe_release_page+0x4d/0x190 [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.030034]  [<ffffffffc06260ae>] nfs_fscache_release_page+0x5e/0xc0 [nfs]
Mar 14 02:56:27 ahdin kernel: [50248.030067]  [<ffffffffc0621c21>] nfs_migrate_page+0x31/0x60 [nfs]
Mar 14 02:56:27 ahdin kernel: [50248.030075]  [<ffffffff811bc916>] move_to_new_page+0x76/0x210
Mar 14 02:56:27 ahdin kernel: [50248.030081]  [<ffffffff8119a573>] ? try_to_unmap+0x73/0xa0
Mar 14 02:56:27 ahdin kernel: [50248.030087]  [<ffffffff81199280>] ? try_to_unmap_nonlinear+0x570/0x570
Mar 14 02:56:27 ahdin kernel: [50248.030094]  [<ffffffff811bd298>] migrate_pages+0x6c8/0x7f0
Mar 14 02:56:27 ahdin kernel: [50248.030101]  [<ffffffff81183fa0>] ? isolate_freepages_block+0x340/0x340
Mar 14 02:56:27 ahdin kernel: [50248.030109]  [<ffffffff81183240>] ? s_show+0x40/0x40
Mar 14 02:56:27 ahdin kernel: [50248.030115]  [<ffffffff811851e0>] compact_zone+0x370/0x4c0
Mar 14 02:56:27 ahdin kernel: [50248.030121]  [<ffffffff811853be>] compact_zone_order+0x8e/0xd0
Mar 14 02:56:27 ahdin kernel: [50248.030128]  [<ffffffff811856a9>] try_to_compact_pages+0xf9/0x170
Mar 14 02:56:27 ahdin kernel: [50248.030137]  [<ffffffff8175cf25>] __alloc_pages_direct_compact+0xa5/0x199
Mar 14 02:56:27 ahdin kernel: [50248.030145]  [<ffffffff8175d729>] __alloc_pages_slowpath+0x710/0x775
Mar 14 02:56:27 ahdin kernel: [50248.030154]  [<ffffffff8116b523>] __alloc_pages_nodemask+0x273/0x2a0
Mar 14 02:56:27 ahdin kernel: [50248.030161]  [<ffffffff811abe74>] alloc_pages_current+0xa4/0x170
Mar 14 02:56:27 ahdin kernel: [50248.030169]  [<ffffffff811b694b>] new_slab+0x32b/0x410
Mar 14 02:56:27 ahdin kernel: [50248.030177]  [<ffffffff8175f56e>] __slab_alloc+0x2ab/0x43e
Mar 14 02:56:27 ahdin kernel: [50248.030185]  [<ffffffff8138a2e5>] ? __radix_tree_preload+0x35/0xa0
Mar 14 02:56:27 ahdin kernel: [50248.030194]  [<ffffffff811b72ab>] kmem_cache_alloc+0x18b/0x1e0
Mar 14 02:56:27 ahdin kernel: [50248.030201]  [<ffffffff8138a2e5>] ? __radix_tree_preload+0x35/0xa0
Mar 14 02:56:27 ahdin kernel: [50248.030209]  [<ffffffff8138a2e5>] __radix_tree_preload+0x35/0xa0
Mar 14 02:56:27 ahdin kernel: [50248.030217]  [<ffffffff8138a3a9>] radix_tree_maybe_preload+0x19/0x20
Mar 14 02:56:27 ahdin kernel: [50248.030224]  [<ffffffff8116213b>] __add_to_page_cache_locked+0x6b/0x240
Mar 14 02:56:27 ahdin kernel: [50248.030232]  [<ffffffff81162358>] add_to_page_cache_lru+0x28/0x80
Mar 14 02:56:27 ahdin kernel: [50248.030239]  [<ffffffff81162450>] pagecache_get_page+0xa0/0x1f0
Mar 14 02:56:27 ahdin kernel: [50248.030247]  [<ffffffff811625cf>] grab_cache_page_write_begin+0x2f/0x50
Mar 14 02:56:27 ahdin kernel: [50248.030301]  [<ffffffffc0470dd4>] xfs_vm_write_begin+0x34/0xe0 [xfs]
Mar 14 02:56:27 ahdin kernel: [50248.030354]  [<ffffffffc0470bf9>] ? xfs_vm_write_end+0x29/0x80 [xfs]
Mar 14 02:56:27 ahdin kernel: [50248.030362]  [<ffffffff81161625>] generic_perform_write+0xc5/0x1b0
Mar 14 02:56:27 ahdin kernel: [50248.030421]  [<ffffffffc047db03>] xfs_file_buffered_aio_write.isra.9+0x103/0x1c0 [xfs]
Mar 14 02:56:27 ahdin kernel: [50248.030478]  [<ffffffffc047dc43>] xfs_file_write_iter+0x83/0x130 [xfs]
Mar 14 02:56:27 ahdin kernel: [50248.030486]  [<ffffffff811d3771>] new_sync_write+0x81/0xb0
Mar 14 02:56:27 ahdin kernel: [50248.030498]  [<ffffffffc1241129>] cachefiles_write_page+0x149/0x300 [cachefiles]
Mar 14 02:56:27 ahdin kernel: [50248.030517]  [<ffffffffc0556d74>] fscache_write_op+0x154/0x250 [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.030535]  [<ffffffffc0556142>] fscache_op_work_func+0x22/0x50 [fscache]
Mar 14 02:56:27 ahdin kernel: [50248.030542]  [<ffffffff81089f32>] process_one_work+0x182/0x450
Mar 14 02:56:27 ahdin kernel: [50248.030548]  [<ffffffff8108a6a3>] worker_thread+0x123/0x5a0
Mar 14 02:56:27 ahdin kernel: [50248.030554]  [<ffffffff8108a580>] ? rescuer_thread+0x380/0x380
Mar 14 02:56:27 ahdin kernel: [50248.030562]  [<ffffffff81091312>] kthread+0xd2/0xf0
Mar 14 02:56:27 ahdin kernel: [50248.030570]  [<ffffffff81091240>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 14 02:56:27 ahdin kernel: [50248.030577]  [<ffffffff8176b5bc>] ret_from_fork+0x7c/0xb0
Mar 14 02:56:27 ahdin kernel: [50248.030585]  [<ffffffff81091240>] ? kthread_create_on_node+0x1c0/0x1c0