[sheepdog-users] Crash khugepaged

[Valerio Pachera]

What do you think about this?

Jun 28 16:34:20 sheepdog004 kernel: [103658.606691] khugepaged      D
ffff88021f393780     0    32      2 0x00000000
Jun 28 16:34:20 sheepdog004 kernel: [103658.606696]  ffff880213793750
0000000000000046 ffffffff00000000 ffff880216566f60
Jun 28 16:34:20 sheepdog004 kernel: [103658.606701]  0000000000013780
ffff880213795fd8 ffff880213795fd8 ffff880213793750
Jun 28 16:34:20 sheepdog004 kernel: [103658.606713]  ffff880213795730
0000000113795730 ffff88021657fe50 ffff88021f393fd0
Jun 28 16:34:20 sheepdog004 kernel: [103658.606718] Call Trace:
Jun 28 16:34:20 sheepdog004 kernel: [103658.606727]
[<ffffffff810b47b3>] ? lock_page+0x20/0x20
Jun 28 16:34:20 sheepdog004 kernel: [103658.606732]
[<ffffffff8134da71>] ? io_schedule+0x59/0x71
Jun 28 16:34:20 sheepdog004 kernel: [103658.606737]
[<ffffffff810b47b9>] ? sleep_on_page+0x6/0xa
Jun 28 16:34:20 sheepdog004 kernel: [103658.606740]
[<ffffffff8134deb4>] ? __wait_on_bit+0x3e/0x71
Jun 28 16:34:20 sheepdog004 kernel: [103658.606744]
[<ffffffff810b48f5>] ? wait_on_page_bit+0x6e/0x73
Jun 28 16:34:20 sheepdog004 kernel: [103658.606751]
[<ffffffff8105fb09>] ? autoremove_wake_function+0x2a/0x2a
Jun 28 16:34:20 sheepdog004 kernel: [103658.606756]
[<ffffffff810c2850>] ? shrink_page_list+0x166/0x73f
Jun 28 16:34:20 sheepdog004 kernel: [103658.606761]
[<ffffffff810c9cfa>] ? zone_page_state_add+0x14/0x23
Jun 28 16:34:20 sheepdog004 kernel: [103658.606765]
[<ffffffff810c0e13>] ? update_isolated_counts+0x13b/0x15a
Jun 28 16:34:20 sheepdog004 kernel: [103658.606769]
[<ffffffff810c32c4>] ? shrink_inactive_list+0x2cd/0x3f0
Jun 28 16:34:20 sheepdog004 kernel: [103658.606774]
[<ffffffff810be232>] ? __lru_cache_add+0x2b/0x51
Jun 28 16:34:20 sheepdog004 kernel: [103658.606778]
[<ffffffff810c3a89>] ? shrink_zone+0x3c0/0x4e6
Jun 28 16:34:20 sheepdog004 kernel: [103658.606783]
[<ffffffff810c3fa7>] ? do_try_to_free_pages+0x1cc/0x41c
Jun 28 16:34:20 sheepdog004 kernel: [103658.606787]
[<ffffffff810c4462>] ? try_to_free_pages+0xa9/0xe9
Jun 28 16:34:20 sheepdog004 kernel: [103658.606791]
[<ffffffff810364e8>] ? should_resched+0x5/0x23
Jun 28 16:34:20 sheepdog004 kernel: [103658.606796]
[<ffffffff810bb3ee>] ? __alloc_pages_nodemask+0x4ed/0x7aa
Jun 28 16:34:20 sheepdog004 kernel: [103658.606801]
[<ffffffff8100d69f>] ? __switch_to+0x133/0x258
Jun 28 16:34:20 sheepdog004 kernel: [103658.606806]
[<ffffffff8134eb77>] ? _raw_spin_unlock_irqrestore+0xe/0xf
Jun 28 16:34:20 sheepdog004 kernel: [103658.606811]
[<ffffffff810e5f05>] ? alloc_pages_vma+0x12d/0x136
Jun 28 16:34:20 sheepdog004 kernel: [103658.606815]
[<ffffffff810ce1c5>] ? pte_pfn+0x5/0xe
Jun 28 16:34:20 sheepdog004 kernel: [103658.606819]
[<ffffffff810ef9bd>] ? khugepaged+0x4dc/0xef3
Jun 28 16:34:20 sheepdog004 kernel: [103658.606823]
[<ffffffff8100d69f>] ? __switch_to+0x133/0x258
Jun 28 16:34:20 sheepdog004 kernel: [103658.606828]
[<ffffffff8105fadf>] ? add_wait_queue+0x3c/0x3c
Jun 28 16:34:20 sheepdog004 kernel: [103658.606833]
[<ffffffff810ef4e1>] ? add_mm_counter.constprop.28+0x9/0x9
Jun 28 16:34:20 sheepdog004 kernel: [103658.606837]
[<ffffffff8105f48d>] ? kthread+0x76/0x7e
Jun 28 16:34:20 sheepdog004 kernel: [103658.606842]
[<ffffffff81355cb4>] ? kernel_thread_helper+0x4/0x10
Jun 28 16:34:20 sheepdog004 kernel: [103658.606847]
[<ffffffff8105f417>] ? kthread_worker_fn+0x139/0x139
Jun 28 16:34:20 sheepdog004 kernel: [103658.606851]
[<ffffffff81355cb0>] ? gs_change+0x13/0x13
Jun 28 16:34:20 sheepdog004 kernel: [103658.606983] sheep           D
ffff88021f393780     0 30859      1 0x00000000
Jun 28 16:34:20 sheepdog004 kernel: [103658.606987]  ffff880101d48730
0000000000000082 0000000000000000 ffff880216566f60
Jun 28 16:34:20 sheepdog004 kernel: [103658.606992]  0000000000013780
ffff8802141dffd8 ffff8802141dffd8 ffff880101d48730
Jun 28 16:34:20 sheepdog004 kernel: [103658.606997]  ffffea00048c4b20
0000000105019098 ffffea0004fdaaa8 ffff880214677be0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607001] Call Trace:
Jun 28 16:34:20 sheepdog004 kernel: [103658.607005]
[<ffffffff8134eac4>] ? rwsem_down_failed_common+0xe0/0x114
Jun 28 16:34:20 sheepdog004 kernel: [103658.607011]
[<ffffffff811b3af3>] ? call_rwsem_down_write_failed+0x13/0x20
Jun 28 16:34:20 sheepdog004 kernel: [103658.607015]
[<ffffffff8134e431>] ? down_write+0x25/0x27
Jun 28 16:34:20 sheepdog004 kernel: [103658.607019]
[<ffffffff810d543d>] ? sys_munmap+0x2e/0x52
Jun 28 16:34:20 sheepdog004 kernel: [103658.607023]
[<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607135] tar             D
ffff88021f293780     0 14370  13938 0x00000000
Jun 28 16:34:20 sheepdog004 kernel: [103658.607139]  ffff88021472ae60
0000000000000086 ffffffff00000000 ffff8802165160c0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607144]  0000000000013780
ffff880128b77fd8 ffff880128b77fd8 ffff88021472ae60
Jun 28 16:34:20 sheepdog004 kernel: [103658.607148]  ffffffff8101360a
00000001810660a1 ffff880213ff3f30 ffff88021f293fd0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607001] Call Trace:
Jun 28 16:34:20 sheepdog004 kernel: [103658.607005]
[<ffffffff8134eac4>] ? rwsem_down_failed_common+0xe0/0x114
Jun 28 16:34:20 sheepdog004 kernel: [103658.607011]
[<ffffffff811b3af3>] ? call_rwsem_down_write_failed+0x13/0x20
Jun 28 16:34:20 sheepdog004 kernel: [103658.607015]
[<ffffffff8134e431>] ? down_write+0x25/0x27
Jun 28 16:34:20 sheepdog004 kernel: [103658.607019]
[<ffffffff810d543d>] ? sys_munmap+0x2e/0x52
Jun 28 16:34:20 sheepdog004 kernel: [103658.607023]
[<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607135] tar             D
ffff88021f293780     0 14370  13938 0x00000000
Jun 28 16:34:20 sheepdog004 kernel: [103658.607139]  ffff88021472ae60
0000000000000086 ffffffff00000000 ffff8802165160c0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607144]  0000000000013780
ffff880128b77fd8 ffff880128b77fd8 ffff88021472ae60
Jun 28 16:34:20 sheepdog004 kernel: [103658.607148]  ffffffff8101360a
00000001810660a1 ffff880213ff3f30 ffff88021f293fd0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607153] Call Trace:
Jun 28 16:34:20 sheepdog004 kernel: [103658.607157]
[<ffffffff8101360a>] ? read_tsc+0x5/0x14
Jun 28 16:34:20 sheepdog004 kernel: [103658.607161]
[<ffffffff810b47b3>] ? lock_page+0x20/0x20
Jun 28 16:34:20 sheepdog004 kernel: [103658.607165]
[<ffffffff8134da71>] ? io_schedule+0x59/0x71
Jun 28 16:34:20 sheepdog004 kernel: [103658.607169]
[<ffffffff810b47b9>] ? sleep_on_page+0x6/0xa
Jun 28 16:34:20 sheepdog004 kernel: [103658.607172]
[<ffffffff8134deb4>] ? __wait_on_bit+0x3e/0x71
Jun 28 16:34:20 sheepdog004 kernel: [103658.607176]
[<ffffffff810b48f5>] ? wait_on_page_bit+0x6e/0x73
Jun 28 16:34:20 sheepdog004 kernel: [103658.607181]
[<ffffffff8105fb09>] ? autoremove_wake_function+0x2a/0x2a
Jun 28 16:34:20 sheepdog004 kernel: [103658.607186]
[<ffffffff810b49cd>] ? filemap_fdatawait_range+0x74/0x139
Jun 28 16:34:20 sheepdog004 kernel: [103658.607191]
[<ffffffff810b6181>] ? filemap_write_and_wait+0x24/0x30
Jun 28 16:34:20 sheepdog004 kernel: [103658.607205]
[<ffffffffa053ac73>] ? nfs_getattr+0x32/0xac [nfs]
Jun 28 16:34:20 sheepdog004 kernel: [103658.607211]
[<ffffffff810fda17>] ? vfs_fstat+0x30/0x4e
Jun 28 16:34:20 sheepdog004 kernel: [103658.607214]
[<ffffffff810fdb49>] ? sys_newfstat+0x12/0x2b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607218]
[<ffffffff810fa376>] ? vfs_write+0xbb/0xe9
Jun 28 16:34:20 sheepdog004 kernel: [103658.607221]
[<ffffffff810fa554>] ? sys_write+0x5f/0x6b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607225]
[<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607335] pgrep           D
ffff88021f293780     0 30870  30869 0x00000000
Jun 28 16:34:20 sheepdog004 kernel: [103658.607339]  ffff880133e7c730
0000000000000086 0000000100000000 ffff8802165160c0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607344]  0000000000013780
ffff8801340f5fd8 ffff8801340f5fd8 ffff880133e7c730
Jun 28 16:34:20 sheepdog004 kernel: [103658.607349]  0000000000000020
000000011f5fcc08 0000000000000002 ffff880214677be0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607353] Call Trace:
Jun 28 16:34:20 sheepdog004 kernel: [103658.607357]
[<ffffffff8134eac4>] ? rwsem_down_failed_common+0xe0/0x114
Jun 28 16:34:20 sheepdog004 kernel: [103658.607361]
[<ffffffff811b3ac4>] ? call_rwsem_down_read_failed+0x14/0x30
Jun 28 16:34:20 sheepdog004 kernel: [103658.607365]
[<ffffffff8134e44a>] ? down_read+0x17/0x19
Jun 28 16:34:20 sheepdog004 kernel: [103658.607369]
[<ffffffff810d1a94>] ? __access_remote_vm+0x3a/0x1c1
Jun 28 16:34:20 sheepdog004 kernel: [103658.607374]
[<ffffffff810d2acb>] ? access_process_vm+0x48/0x65
Jun 28 16:34:20 sheepdog004 kernel: [103658.607378]
[<ffffffff81140852>] ? proc_pid_cmdline+0x63/0xf0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607382]
[<ffffffff81141a58>] ? proc_info_read+0x5b/0xb8
Jun 28 16:34:20 sheepdog004 kernel: [103658.607386]
[<ffffffff810fa443>] ? vfs_read+0x9f/0xe6
Jun 28 16:34:20 sheepdog004 kernel: [103658.607390]
[<ffffffff810fa4cf>] ? sys_read+0x45/0x6b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607393]
[<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607503] pgrep           D
ffff88021f293780     0 30926  30925 0x00000000
Jun 28 16:34:20 sheepdog004 kernel: [103658.607507]  ffff880212ed2e20
0000000000000086 0000000100000000 ffff8802165160c0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607512]  0000000000013780
ffff880132047fd8 ffff880132047fd8 ffff880212ed2e20
Jun 28 16:34:20 sheepdog004 kernel: [103658.607517]  0000000000000020
000000011f5fcc08 0000000000000002 ffff880214677be0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607521] Call Trace:
Jun 28 16:34:20 sheepdog004 kernel: [103658.607525]
[<ffffffff8134eac4>] ? rwsem_down_failed_common+0xe0/0x114
Jun 28 16:34:20 sheepdog004 kernel: [103658.607529]
[<ffffffff811b3ac4>] ? call_rwsem_down_read_failed+0x14/0x30
Jun 28 16:34:20 sheepdog004 kernel: [103658.607533]
[<ffffffff8134e44a>] ? down_read+0x17/0x19
Jun 28 16:34:20 sheepdog004 kernel: [103658.607537]
[<ffffffff810d1a94>] ? __access_remote_vm+0x3a/0x1c1
Jun 28 16:34:20 sheepdog004 kernel: [103658.607541]
[<ffffffff810d2acb>] ? access_process_vm+0x48/0x65
Jun 28 16:34:20 sheepdog004 kernel: [103658.607545]
[<ffffffff81140852>] ? proc_pid_cmdline+0x63/0xf0
Jun 28 16:34:20 sheepdog004 kernel: [103658.607548]
[<ffffffff81141a58>] ? proc_info_read+0x5b/0xb8
Jun 28 16:34:20 sheepdog004 kernel: [103658.607552]
[<ffffffff810fa443>] ? vfs_read+0x9f/0xe6
Jun 28 16:34:20 sheepdog004 kernel: [103658.607556]
[<ffffffff810fa4cf>] ? sys_read+0x45/0x6b
Jun 28 16:34:20 sheepdog004 kernel: [103658.607559]
[<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b
Jun 28 16:36:20 sheepdog004 kernel: [103778.581543] Call Trace:
Jun 28 16:36:20 sheepdog004 kernel: [103778.581552]
[<ffffffff810b47b3>] ? lock_page+0x20/0x20
Jun 28 16:36:20 sheepdog004 kernel: [103778.581557]
[<ffffffff8134da71>] ? io_schedule+0x59/0x71
Jun 28 16:36:20 sheepdog004 kernel: [103778.581561]
[<ffffffff810b47b9>] ? sleep_on_page+0x6/0xa
Jun 28 16:36:20 sheepdog004 kernel: [103778.581565]
[<ffffffff8134deb4>] ? __wait_on_bit+0x3e/0x71
Jun 28 16:36:20 sheepdog004 kernel: [103778.581569]
[<ffffffff810b48f5>] ? wait_on_page_bit+0x6e/0x73
Jun 28 16:36:20 sheepdog004 kernel: [103778.581575]
[<ffffffff8105fb09>] ? autoremove_wake_function+0x2a/0x2a
Jun 28 16:36:20 sheepdog004 kernel: [103778.581581]
[<ffffffff810c2850>] ? shrink_page_list+0x166/0x73f
Jun 28 16:36:20 sheepdog004 kernel: [103778.581586]
[<ffffffff810c9cfa>] ? zone_page_state_add+0x14/0x23
Jun 28 16:36:20 sheepdog004 kernel: [103778.581591]
[<ffffffff810c0e13>] ? update_isolated_counts+0x13b/0x15a
Jun 28 16:36:20 sheepdog004 kernel: [103778.581595]
[<ffffffff810c32c4>] ? shrink_inactive_list+0x2cd/0x3f0
Jun 28 16:36:20 sheepdog004 kernel: [103778.581600]
[<ffffffff810be232>] ? __lru_cache_add+0x2b/0x51
Jun 28 16:36:20 sheepdog004 kernel: [103778.581604]
[<ffffffff810c3a89>] ? shrink_zone+0x3c0/0x4e6
Jun 28 16:36:20 sheepdog004 kernel: [103778.581608]
[<ffffffff810c3fa7>] ? do_try_to_free_pages+0x1cc/0x41c
Jun 28 16:36:20 sheepdog004 kernel: [103778.581612]
[<ffffffff810c4462>] ? try_to_free_pages+0xa9/0xe9
Jun 28 16:36:20 sheepdog004 kernel: [103778.581616]
[<ffffffff810364e8>] ? should_resched+0x5/0x23
Jun 28 16:36:20 sheepdog004 kernel: [103778.581621]
[<ffffffff810bb3ee>] ? __alloc_pages_nodemask+0x4ed/0x7aa
Jun 28 16:36:20 sheepdog004 kernel: [103778.581626]
[<ffffffff8100d69f>] ? __switch_to+0x133/0x258
Jun 28 16:36:20 sheepdog004 kernel: [103778.581631]
[<ffffffff8134eb77>] ? _raw_spin_unlock_irqrestore+0xe/0xf
Jun 28 16:36:20 sheepdog004 kernel: [103778.581636]
[<ffffffff810e5f05>] ? alloc_pages_vma+0x12d/0x136
Jun 28 16:36:20 sheepdog004 kernel: [103778.581640]
[<ffffffff810ce1c5>] ? pte_pfn+0x5/0xe
Jun 28 16:36:20 sheepdog004 kernel: [103778.581645]
[<ffffffff810ef9bd>] ? khugepaged+0x4dc/0xef3
Jun 28 16:36:20 sheepdog004 kernel: [103778.581649]
[<ffffffff8100d69f>] ? __switch_to+0x133/0x258
Jun 28 16:36:20 sheepdog004 kernel: [103778.581654]
[<ffffffff8105fadf>] ? add_wait_queue+0x3c/0x3c
Jun 28 16:36:20 sheepdog004 kernel: [103778.581658]
[<ffffffff810ef4e1>] ? add_mm_counter.constprop.28+0x9/0x9
Jun 28 16:36:20 sheepdog004 kernel: [103778.581662]
[<ffffffff8105f48d>] ? kthread+0x76/0x7e
Jun 28 16:36:20 sheepdog004 kernel: [103778.581667]
[<ffffffff81355cb4>] ? kernel_thread_helper+0x4/0x10
Jun 28 16:36:20 sheepdog004 kernel: [103778.581671]
[<ffffffff8105f417>] ? kthread_worker_fn+0x139/0x139
Jun 28 16:36:20 sheepdog004 kernel: [103778.581675]
[<ffffffff81355cb0>] ? gs_change+0x13/0x13
Jun 28 16:36:20 sheepdog004 kernel: [103778.581808] sheep           D
ffff88021f393780     0 30859      1 0x00000000
Jun 28 16:36:20 sheepdog004 kernel: [103778.581813]  ffff880101d48730
0000000000000082 0000000000000000 ffff880216566f60
Jun 28 16:36:20 sheepdog004 kernel: [103778.581817]  0000000000013780
ffff8802141dffd8 ffff8802141dffd8 ffff880101d48730
Jun 28 16:36:20 sheepdog004 kernel: [103778.581822]  ffffea00048c4b20
0000000105019098 ffffea0004fdaaa8 ffff880214677be0
Jun 28 16:36:20 sheepdog004 kernel: [103778.581827] Call Trace:
Jun 28 16:36:20 sheepdog004 kernel: [103778.581831]
[<ffffffff8134eac4>] ? rwsem_down_failed_common+0xe0/0x114
Jun 28 16:36:20 sheepdog004 kernel: [103778.581842]
[<ffffffff811b3af3>] ? call_rwsem_down_write_failed+0x13/0x20
Jun 28 16:36:20 sheepdog004 kernel: [103778.581846]
[<ffffffff8134e431>] ? down_write+0x25/0x27
Jun 28 16:36:20 sheepdog004 kernel: [103778.581850]
[<ffffffff810d543d>] ? sys_munmap+0x2e/0x52
Jun 28 16:36:20 sheepdog004 kernel: [103778.581854]
[<ffffffff81353b52>] ? system_call_fastpath+0x16/0x1b
Jun 28 16:36:20 sheepdog004 kernel: [103778.581969] tar             D
ffff88021f293780     0 14370  13938 0x00000000
Jun 28 16:36:20 sheepdog004 kernel: [103778.581974]  ffff88021472ae60
0000000000000086 ffffffff00000000 ffff8802165160c0
Jun 28 16:36:20 sheepdog004 kernel: [103778.581978]  0000000000013780
ffff880128b77fd8 ffff880128b77fd8 ffff88021472ae60
Jun 28 16:36:20 sheepdog004 kernel: [103778.581983]  ffffffff8101360a
00000001810660a1 ffff880213ff3f30 ffff88021f293fd0
Jun 28 16:36:20 sheepdog004 kernel: [103778.581988] Call Trace:
Jun 28 16:36:20 sheepdog004 kernel: [103778.581992]
[<ffffffff8101360a>] ? read_tsc+0x5/0x14
Jun 28 16:36:20 sheepdog004 kernel: [103778.581996]
[<ffffffff810b47b3>] ? lock_page+0x20/0x20
Jun 28 16:36:20 sheepdog004 kernel: [103778.581999]
[<ffffffff8134da71>] ? io_schedule+0x59/0x71
Jun 28 16:36:20 sheepdog004 kernel: [103778.582003]
[<ffffffff810b47b9>] ? sleep_on_page+0x6/0xa
....

Host with 8G of ram.
The host was exporting also a nfs folder.
Guest was mounting this folder.
Guest for decompressing a big tar.gz (77G).