$ uname -a Linux localhost.localdomain 4.15.7-300.fc27.x86_64+debug #1 SMP Wed Feb 28 17:32:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux How reproduce: 1. start virtual machine 2. open https://oom.sy24.ru/ in Firefox which will helps occurred OOM. Sorry I can't attach here html page because my message will rejected as message would contained HTML subpart. Actual result virtual machine hang and even couldn't be force off. Expected result virtual machine continue work. [ 2335.903277] INFO: task CPU 0/KVM:7450 blocked for more than 120 seconds. [ 2335.903284] Not tainted 4.15.7-300.fc27.x86_64+debug #1 [ 2335.903287] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2335.903291] CPU 0/KVM D10648 7450 1 0x00000000 [ 2335.903298] Call Trace: [ 2335.903308] ? __schedule+0x2e9/0xbb0 [ 2335.903318] ? __lock_page+0xad/0x180 [ 2335.903322] schedule+0x2f/0x90 [ 2335.903327] io_schedule+0x12/0x40 [ 2335.903331] __lock_page+0xed/0x180 [ 2335.903338] ? page_cache_tree_insert+0x130/0x130 [ 2335.903347] deferred_split_scan+0x318/0x340 [ 2335.903358] shrink_slab.part.48+0x202/0x5a0 [ 2335.903368] ? percpu_ref_put_many+0x84/0x110 [ 2335.903378] shrink_node+0x2f4/0x300 [ 2335.903390] do_try_to_free_pages+0xca/0x350 [ 2335.903399] try_to_free_pages+0x140/0x350 [ 2335.903411] __alloc_pages_slowpath+0x43c/0x1080 [ 2335.903417] ? __lock_acquire+0x2d4/0x1340 [ 2335.903437] __alloc_pages_nodemask+0x3af/0x440 [ 2335.903448] alloc_pages_vma+0x7c/0x200 [ 2335.903456] ksm_might_need_to_copy+0x97/0x210 [ 2335.903463] do_swap_page+0x413/0xb50 [ 2335.903474] __handle_mm_fault+0x89e/0x1290 [ 2335.903489] handle_mm_fault+0x14c/0x300 [ 2335.903496] __get_user_pages+0x1b3/0x760 [ 2335.903518] ? __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2335.903528] get_user_pages+0x3e/0x50 [ 2335.903542] __gfn_to_pfn_memslot+0x133/0x480 [kvm] [ 2335.903564] try_async_pf+0x67/0x3b0 [kvm] [ 2335.903587] tdp_page_fault+0x13e/0x290 [kvm] [ 2335.903607] kvm_mmu_page_fault+0x59/0x130 [kvm] [ 2335.903624] kvm_arch_vcpu_ioctl_run+0x7d1/0x1ba0 [kvm] [ 2335.903641] ? kvm_arch_vcpu_load+0x75/0x250 [kvm] [ 2335.903647] ? handle_monitor_trap+0x10/0x10 [kvm_intel] [ 2335.903658] ? kvm_arch_vcpu_load+0x90/0x250 [kvm] [ 2335.903674] ? kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2335.903684] kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2335.903698] do_vfs_ioctl+0xa5/0x6e0 [ 2335.903709] SyS_ioctl+0x74/0x80 [ 2335.903716] do_syscall_64+0x79/0x220 [ 2335.903722] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 2335.903726] RIP: 0033:0x7fb1ceec50f7 [ 2335.903728] RSP: 002b:00007fb1bf364878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 2335.903732] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb1ceec50f7 [ 2335.903734] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000013 [ 2335.903736] RBP: 0000561b56cb3e40 R08: 0000561b56cce1f0 R09: 00000000000000ff [ 2335.903739] R10: 0000000000000001 R11: 0000000000000246 R12: 0000561b57c8d5d6 [ 2335.903741] R13: 0000000000000000 R14: 00007fb1d8592000 R15: 0000561b57c8d540 [ 2335.903762] Showing all locks held in the system: [ 2335.903773] 1 lock held by khungtaskd/67: [ 2335.903776] #0: (tasklist_lock){.+.+}, at: [<00000000ae7bc74b>] debug_show_all_locks+0x37/0x1a0 [ 2335.903853] 2 locks held by gnome-shell/1971: [ 2335.903855] #0: (&mm->mmap_sem){++++}, at: [<00000000328d764a>] __do_page_fault+0x17a/0x530 [ 2335.903867] #1: (&ei->i_mmap_sem){++++}, at: [<000000002b36ff5a>] ext4_filemap_fault+0x27/0x3e [ 2335.903930] 2 locks held by sbis3plugin/2761: [ 2335.903932] #0: (&mm->mmap_sem){++++}, at: [<00000000328d764a>] __do_page_fault+0x17a/0x530 [ 2335.903942] #1: (&ei->i_mmap_sem){++++}, at: [<000000002b36ff5a>] ext4_filemap_fault+0x27/0x3e [ 2335.904110] 2 locks held by opera-developer/5828: [ 2335.904112] #0: (&mm->mmap_sem){++++}, at: [<00000000328d764a>] __do_page_fault+0x17a/0x530 [ 2335.904122] #1: (&ei->i_mmap_sem){++++}, at: [<000000002b36ff5a>] ext4_filemap_fault+0x27/0x3e [ 2335.904167] 4 locks held by CPU 0/KVM/7450: [ 2335.904169] #0: (&vcpu->mutex){+.+.}, at: [<000000000bb20b8b>] vcpu_load+0x17/0x60 [kvm] [ 2335.904188] #1: (&kvm->srcu){....}, at: [<000000007181f206>] kvm_arch_vcpu_ioctl_run+0x73c/0x1ba0 [kvm] [ 2335.904209] #2: (&mm->mmap_sem){++++}, at: [<00000000c6f7c4d3>] __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2335.904229] #3: (shrinker_rwsem){++++}, at: [<00000000af097e48>] shrink_slab.part.48+0x5b/0x5a0 [ 2335.904248] ============================================= [ 2347.613324] oom_reaper: reaped process 8209 (file:// Content), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [ 2458.783866] INFO: task CPU 0/KVM:7450 blocked for more than 120 seconds. [ 2458.783871] Not tainted 4.15.7-300.fc27.x86_64+debug #1 [ 2458.783873] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2458.783876] CPU 0/KVM D10648 7450 1 0x00000000 [ 2458.783881] Call Trace: [ 2458.783889] ? __schedule+0x2e9/0xbb0 [ 2458.783895] ? __lock_page+0xad/0x180 [ 2458.783898] schedule+0x2f/0x90 [ 2458.783900] io_schedule+0x12/0x40 [ 2458.783903] __lock_page+0xed/0x180 [ 2458.783908] ? page_cache_tree_insert+0x130/0x130 [ 2458.783913] deferred_split_scan+0x318/0x340 [ 2458.783920] shrink_slab.part.48+0x202/0x5a0 [ 2458.783926] ? percpu_ref_put_many+0x84/0x110 [ 2458.783932] shrink_node+0x2f4/0x300 [ 2458.783939] do_try_to_free_pages+0xca/0x350 [ 2458.783944] try_to_free_pages+0x140/0x350 [ 2458.783951] __alloc_pages_slowpath+0x43c/0x1080 [ 2458.783954] ? __lock_acquire+0x2d4/0x1340 [ 2458.783965] __alloc_pages_nodemask+0x3af/0x440 [ 2458.783971] alloc_pages_vma+0x7c/0x200 [ 2458.783975] ksm_might_need_to_copy+0x97/0x210 [ 2458.783979] do_swap_page+0x413/0xb50 [ 2458.783985] __handle_mm_fault+0x89e/0x1290 [ 2458.783994] handle_mm_fault+0x14c/0x300 [ 2458.783998] __get_user_pages+0x1b3/0x760 [ 2458.784014] ? __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2458.784020] get_user_pages+0x3e/0x50 [ 2458.784029] __gfn_to_pfn_memslot+0x133/0x480 [kvm] [ 2458.784043] try_async_pf+0x67/0x3b0 [kvm] [ 2458.784057] tdp_page_fault+0x13e/0x290 [kvm] [ 2458.784070] kvm_mmu_page_fault+0x59/0x130 [kvm] [ 2458.784080] kvm_arch_vcpu_ioctl_run+0x7d1/0x1ba0 [kvm] [ 2458.784092] ? kvm_arch_vcpu_load+0x75/0x250 [kvm] [ 2458.784096] ? handle_monitor_trap+0x10/0x10 [kvm_intel] [ 2458.784103] ? kvm_arch_vcpu_load+0x90/0x250 [kvm] [ 2458.784113] ? kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2458.784119] kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2458.784127] do_vfs_ioctl+0xa5/0x6e0 [ 2458.784134] SyS_ioctl+0x74/0x80 [ 2458.784138] do_syscall_64+0x79/0x220 [ 2458.784142] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 2458.784144] RIP: 0033:0x7fb1ceec50f7 [ 2458.784146] RSP: 002b:00007fb1bf364878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 2458.784148] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb1ceec50f7 [ 2458.784150] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000013 [ 2458.784151] RBP: 0000561b56cb3e40 R08: 0000561b56cce1f0 R09: 00000000000000ff [ 2458.784152] R10: 0000000000000001 R11: 0000000000000246 R12: 0000561b57c8d5d6 [ 2458.784154] R13: 0000000000000000 R14: 00007fb1d8592000 R15: 0000561b57c8d540 [ 2458.784166] Showing all locks held in the system: [ 2458.784175] 1 lock held by khungtaskd/67: [ 2458.784176] #0: (tasklist_lock){.+.+}, at: [<00000000ae7bc74b>] debug_show_all_locks+0x37/0x1a0 [ 2458.784187] 2 locks held by kworker/u16:2/145: [ 2458.784188] #0: ((wq_completion)"events_unbound"){+.+.}, at: [<000000001b0d8f9e>] process_one_work+0x1da/0x6e0 [ 2458.784196] #1: ((work_completion)(&state->commit_work)){+.+.}, at: [<000000001b0d8f9e>] process_one_work+0x1da/0x6e0 [ 2458.784443] 4 locks held by CPU 0/KVM/7450: [ 2458.784444] #0: (&vcpu->mutex){+.+.}, at: [<000000000bb20b8b>] vcpu_load+0x17/0x60 [kvm] [ 2458.784456] #1: (&kvm->srcu){....}, at: [<000000007181f206>] kvm_arch_vcpu_ioctl_run+0x73c/0x1ba0 [kvm] [ 2458.784468] #2: (&mm->mmap_sem){++++}, at: [<00000000c6f7c4d3>] __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2458.784479] #3: (shrinker_rwsem){++++}, at: [<00000000af097e48>] shrink_slab.part.48+0x5b/0x5a0 [ 2458.784489] 2 locks held by file:// Content/8209: [ 2458.784490] #0: (&type->s_umount_key#46){++++}, at: [<000000004e26f718>] deactivate_super+0x33/0x50 [ 2458.784498] #1: (shrinker_rwsem){++++}, at: [<000000009cbdd6d5>] unregister_shrinker+0x1c/0x80 [ 2458.784507] ============================================= [ 2581.664464] INFO: task CPU 0/KVM:7450 blocked for more than 120 seconds. [ 2581.664470] Not tainted 4.15.7-300.fc27.x86_64+debug #1 [ 2581.664472] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2581.664474] CPU 0/KVM D10648 7450 1 0x00000000 [ 2581.664479] Call Trace: [ 2581.664487] ? __schedule+0x2e9/0xbb0 [ 2581.664492] ? __lock_page+0xad/0x180 [ 2581.664495] schedule+0x2f/0x90 [ 2581.664498] io_schedule+0x12/0x40 [ 2581.664500] __lock_page+0xed/0x180 [ 2581.664505] ? page_cache_tree_insert+0x130/0x130 [ 2581.664510] deferred_split_scan+0x318/0x340 [ 2581.664517] shrink_slab.part.48+0x202/0x5a0 [ 2581.664523] ? percpu_ref_put_many+0x84/0x110 [ 2581.664529] shrink_node+0x2f4/0x300 [ 2581.664535] do_try_to_free_pages+0xca/0x350 [ 2581.664540] try_to_free_pages+0x140/0x350 [ 2581.664547] __alloc_pages_slowpath+0x43c/0x1080 [ 2581.664551] ? __lock_acquire+0x2d4/0x1340 [ 2581.664561] __alloc_pages_nodemask+0x3af/0x440 [ 2581.664567] alloc_pages_vma+0x7c/0x200 [ 2581.664572] ksm_might_need_to_copy+0x97/0x210 [ 2581.664577] do_swap_page+0x413/0xb50 [ 2581.664582] __handle_mm_fault+0x89e/0x1290 [ 2581.664590] handle_mm_fault+0x14c/0x300 [ 2581.664594] __get_user_pages+0x1b3/0x760 [ 2581.664616] ? __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2581.664622] get_user_pages+0x3e/0x50 [ 2581.664631] __gfn_to_pfn_memslot+0x133/0x480 [kvm] [ 2581.664645] try_async_pf+0x67/0x3b0 [kvm] [ 2581.664659] tdp_page_fault+0x13e/0x290 [kvm] [ 2581.664672] kvm_mmu_page_fault+0x59/0x130 [kvm] [ 2581.664683] kvm_arch_vcpu_ioctl_run+0x7d1/0x1ba0 [kvm] [ 2581.664694] ? kvm_arch_vcpu_load+0x75/0x250 [kvm] [ 2581.664708] ? handle_monitor_trap+0x10/0x10 [kvm_intel] [ 2581.664716] ? kvm_arch_vcpu_load+0x90/0x250 [kvm] [ 2581.664726] ? kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2581.664733] kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2581.664741] do_vfs_ioctl+0xa5/0x6e0 [ 2581.664747] SyS_ioctl+0x74/0x80 [ 2581.664752] do_syscall_64+0x79/0x220 [ 2581.664755] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 2581.664758] RIP: 0033:0x7fb1ceec50f7 [ 2581.664759] RSP: 002b:00007fb1bf364878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 2581.664762] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb1ceec50f7 [ 2581.664763] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000013 [ 2581.664764] RBP: 0000561b56cb3e40 R08: 0000561b56cce1f0 R09: 00000000000000ff [ 2581.664766] R10: 0000000000000001 R11: 0000000000000246 R12: 0000561b57c8d5d6 [ 2581.664767] R13: 0000000000000000 R14: 00007fb1d8592000 R15: 0000561b57c8d540 [ 2581.664779] INFO: task file:// Content:8209 blocked for more than 120 seconds. [ 2581.664782] Not tainted 4.15.7-300.fc27.x86_64+debug #1 [ 2581.664784] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2581.664786] file:// Content D11576 8209 3533 0x80000106 [ 2581.664790] Call Trace: [ 2581.664794] ? __schedule+0x2e9/0xbb0 [ 2581.664809] ? rwsem_down_write_failed+0x2cc/0x4d0 [ 2581.664811] schedule+0x2f/0x90 [ 2581.664813] rwsem_down_write_failed+0x2d1/0x4d0 [ 2581.664822] ? call_rwsem_down_write_failed+0x13/0x20 [ 2581.664824] call_rwsem_down_write_failed+0x13/0x20 [ 2581.664828] down_write+0x8a/0xb0 [ 2581.664830] unregister_shrinker+0x1c/0x80 [ 2581.664834] deactivate_locked_super+0x33/0x70 [ 2581.664837] cleanup_mnt+0x3b/0x70 [ 2581.664840] put_ipc_ns+0x37/0x90 [ 2581.664843] free_nsproxy+0x3b/0xa0 [ 2581.664846] do_exit+0x340/0xd70 [ 2581.664850] ? get_signal+0x2ea/0x890 [ 2581.664854] do_group_exit+0x47/0xc0 [ 2581.664857] get_signal+0x2ab/0x890 [ 2581.664862] ? page_fault+0x65/0x80 [ 2581.664866] do_signal+0x36/0x640 [ 2581.664872] ? handle_mm_fault+0x14c/0x300 [ 2581.664877] ? __do_page_fault+0x28c/0x530 [ 2581.664881] ? page_fault+0x65/0x80 [ 2581.664884] exit_to_usermode_loop+0x73/0xb0 [ 2581.664887] prepare_exit_to_usermode+0xb8/0xc0 [ 2581.664889] retint_user+0x8/0x18 [ 2581.664891] RIP: 0033:0x7f9d6ed78b40 [ 2581.664892] RSP: 002b:00007ffcc14d0398 EFLAGS: 00010246 [ 2581.664895] RAX: 0000000000000000 RBX: 00007f899b54a000 RCX: 0000000000000000 [ 2581.664896] RDX: 00007ffcc14d03ec RSI: 0000000000000000 RDI: 00000000000001d8 [ 2581.664897] RBP: 00007ffcc14d03d0 R08: 00007f9d7154d0a8 R09: 00007f8a74f314f8 [ 2581.664898] R10: 00007f899b548800 R11: 00000000fffffff0 R12: 00007ffcc14d03ec [ 2581.664900] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 2581.664909] Showing all locks held in the system: [ 2581.664918] 1 lock held by khungtaskd/67: [ 2581.664919] #0: (tasklist_lock){.+.+}, at: [<00000000ae7bc74b>] debug_show_all_locks+0x37/0x1a0 [ 2581.665075] 2 locks held by opera-developer/4236: [ 2581.665076] #0: (&type->s_umount_key#4/1){+.+.}, at: [<00000000c6bc71b9>] sget_userns+0x155/0x500 [ 2581.665094] #1: (shrinker_rwsem){++++}, at: [<000000006b6cfc5f>] register_shrinker+0x4a/0xb0 [ 2581.665242] 4 locks held by CPU 0/KVM/7450: [ 2581.665244] #0: (&vcpu->mutex){+.+.}, at: [<000000000bb20b8b>] vcpu_load+0x17/0x60 [kvm] [ 2581.665271] #1: (&kvm->srcu){....}, at: [<000000007181f206>] kvm_arch_vcpu_ioctl_run+0x73c/0x1ba0 [kvm] [ 2581.665290] #2: (&mm->mmap_sem){++++}, at: [<00000000c6f7c4d3>] __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2581.665306] #3: (shrinker_rwsem){++++}, at: [<00000000af097e48>] shrink_slab.part.48+0x5b/0x5a0 [ 2581.665318] 2 locks held by file:// Content/8209: [ 2581.665319] #0: (&type->s_umount_key#46){++++}, at: [<000000004e26f718>] deactivate_super+0x33/0x50 [ 2581.665330] #1: (shrinker_rwsem){++++}, at: [<000000009cbdd6d5>] unregister_shrinker+0x1c/0x80 [ 2581.665342] ============================================= [ 2704.545628] INFO: task opera-developer:4236 blocked for more than 120 seconds. [ 2704.545633] Not tainted 4.15.7-300.fc27.x86_64+debug #1 [ 2704.545635] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2704.545638] opera-developer D12136 4236 4234 0x00000000 [ 2704.545643] Call Trace: [ 2704.545651] ? __schedule+0x2e9/0xbb0 [ 2704.545655] ? rwsem_down_write_failed+0x2cc/0x4d0 [ 2704.545658] schedule+0x2f/0x90 [ 2704.545660] rwsem_down_write_failed+0x2d1/0x4d0 [ 2704.545669] ? call_rwsem_down_write_failed+0x13/0x20 [ 2704.545671] call_rwsem_down_write_failed+0x13/0x20 [ 2704.545675] down_write+0x8a/0xb0 [ 2704.545679] register_shrinker+0x4a/0xb0 [ 2704.545684] sget_userns+0x46e/0x500 [ 2704.545686] ? set_anon_super+0x10/0x10 [ 2704.545689] ? proc_get_inode+0x140/0x140 [ 2704.545693] mount_ns+0x5b/0x100 [ 2704.545697] mount_fs+0x35/0x150 [ 2704.545702] vfs_kern_mount.part.25+0x54/0x150 [ 2704.545706] kern_mount_data+0x21/0x40 [ 2704.545708] pid_ns_prepare_proc+0x18/0x30 [ 2704.545711] alloc_pid+0x244/0x260 [ 2704.545716] copy_process.part.30+0x118b/0x1e70 [ 2704.545727] _do_fork+0xe7/0x700 [ 2704.545731] ? up_read+0x1c/0x40 [ 2704.545734] ? __do_page_fault+0x2af/0x530 [ 2704.545738] ? trace_hardirqs_on_caller+0xed/0x180 [ 2704.545743] do_syscall_64+0x79/0x220 [ 2704.545747] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 2704.545749] RIP: 0033:0x7f8c6fc7c161 [ 2704.545751] RSP: 002b:00007ffd99692b08 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 [ 2704.545753] RAX: ffffffffffffffda RBX: 0000000020000011 RCX: 00007f8c6fc7c161 [ 2704.545755] RDX: 0000000000000000 RSI: 00007ffd99696b10 RDI: 0000000020000011 [ 2704.545756] RBP: 00007ffd99696b30 R08: 0000000000000000 R09: 0000000000000000 [ 2704.545757] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd9969b8b0 [ 2704.545759] R13: 00007ffd996990a8 R14: 0000000000000000 R15: 0000000000000000 [ 2704.545876] INFO: task CPU 0/KVM:7450 blocked for more than 120 seconds. [ 2704.545879] Not tainted 4.15.7-300.fc27.x86_64+debug #1 [ 2704.545880] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2704.545882] CPU 0/KVM D10648 7450 1 0x00000004 [ 2704.545887] Call Trace: [ 2704.545891] ? __schedule+0x2e9/0xbb0 [ 2704.545897] ? __lock_page+0xad/0x180 [ 2704.545899] schedule+0x2f/0x90 [ 2704.545902] io_schedule+0x12/0x40 [ 2704.545905] __lock_page+0xed/0x180 [ 2704.545910] ? page_cache_tree_insert+0x130/0x130 [ 2704.545915] deferred_split_scan+0x318/0x340 [ 2704.545921] shrink_slab.part.48+0x202/0x5a0 [ 2704.545927] ? percpu_ref_put_many+0x84/0x110 [ 2704.545932] shrink_node+0x2f4/0x300 [ 2704.545939] do_try_to_free_pages+0xca/0x350 [ 2704.545944] try_to_free_pages+0x140/0x350 [ 2704.545951] __alloc_pages_slowpath+0x43c/0x1080 [ 2704.545954] ? __lock_acquire+0x2d4/0x1340 [ 2704.545964] __alloc_pages_nodemask+0x3af/0x440 [ 2704.545971] alloc_pages_vma+0x7c/0x200 [ 2704.545975] ksm_might_need_to_copy+0x97/0x210 [ 2704.545979] do_swap_page+0x413/0xb50 [ 2704.545985] __handle_mm_fault+0x89e/0x1290 [ 2704.545993] handle_mm_fault+0x14c/0x300 [ 2704.545997] __get_user_pages+0x1b3/0x760 [ 2704.546013] ? __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2704.546019] get_user_pages+0x3e/0x50 [ 2704.546027] __gfn_to_pfn_memslot+0x133/0x480 [kvm] [ 2704.546041] try_async_pf+0x67/0x3b0 [kvm] [ 2704.546055] tdp_page_fault+0x13e/0x290 [kvm] [ 2704.546069] kvm_mmu_page_fault+0x59/0x130 [kvm] [ 2704.546080] kvm_arch_vcpu_ioctl_run+0x7d1/0x1ba0 [kvm] [ 2704.546091] ? kvm_arch_vcpu_load+0x75/0x250 [kvm] [ 2704.546098] ? handle_monitor_trap+0x10/0x10 [kvm_intel] [ 2704.546110] ? kvm_arch_vcpu_load+0x90/0x250 [kvm] [ 2704.546125] ? kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2704.546145] kvm_vcpu_ioctl+0x284/0x6a0 [kvm] [ 2704.546157] do_vfs_ioctl+0xa5/0x6e0 [ 2704.546177] SyS_ioctl+0x74/0x80 [ 2704.546183] do_syscall_64+0x79/0x220 [ 2704.546188] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 2704.546190] RIP: 0033:0x7fb1ceec50f7 [ 2704.546192] RSP: 002b:00007fb1bf364878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 2704.546196] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb1ceec50f7 [ 2704.546198] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000013 [ 2704.546200] RBP: 0000561b56cb3e40 R08: 0000561b56cce1f0 R09: 00000000000000ff [ 2704.546202] R10: 0000000000000001 R11: 0000000000000246 R12: 0000561b57c8d5d6 [ 2704.546204] R13: 0000000000000000 R14: 00007fb1d8592000 R15: 0000561b57c8d540 [ 2704.546220] INFO: task file:// Content:8209 blocked for more than 120 seconds. [ 2704.546224] Not tainted 4.15.7-300.fc27.x86_64+debug #1 [ 2704.546226] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 2704.546229] file:// Content D11576 8209 3533 0x80000106 [ 2704.546234] Call Trace: [ 2704.546240] ? __schedule+0x2e9/0xbb0 [ 2704.546245] ? rwsem_down_write_failed+0x2cc/0x4d0 [ 2704.546249] schedule+0x2f/0x90 [ 2704.546252] rwsem_down_write_failed+0x2d1/0x4d0 [ 2704.546265] ? call_rwsem_down_write_failed+0x13/0x20 [ 2704.546278] call_rwsem_down_write_failed+0x13/0x20 [ 2704.546284] down_write+0x8a/0xb0 [ 2704.546289] unregister_shrinker+0x1c/0x80 [ 2704.546294] deactivate_locked_super+0x33/0x70 [ 2704.546297] cleanup_mnt+0x3b/0x70 [ 2704.546310] put_ipc_ns+0x37/0x90 [ 2704.546313] free_nsproxy+0x3b/0xa0 [ 2704.546317] do_exit+0x340/0xd70 [ 2704.546321] ? get_signal+0x2ea/0x890 [ 2704.546335] do_group_exit+0x47/0xc0 [ 2704.546339] get_signal+0x2ab/0x890 [ 2704.546343] ? page_fault+0x65/0x80 [ 2704.546347] do_signal+0x36/0x640 [ 2704.546354] ? handle_mm_fault+0x14c/0x300 [ 2704.546358] ? __do_page_fault+0x28c/0x530 [ 2704.546363] ? page_fault+0x65/0x80 [ 2704.546368] exit_to_usermode_loop+0x73/0xb0 [ 2704.546372] prepare_exit_to_usermode+0xb8/0xc0 [ 2704.546377] retint_user+0x8/0x18 [ 2704.546380] RIP: 0033:0x7f9d6ed78b40 [ 2704.546382] RSP: 002b:00007ffcc14d0398 EFLAGS: 00010246 [ 2704.546386] RAX: 0000000000000000 RBX: 00007f899b54a000 RCX: 0000000000000000 [ 2704.546388] RDX: 00007ffcc14d03ec RSI: 0000000000000000 RDI: 00000000000001d8 [ 2704.546389] RBP: 00007ffcc14d03d0 R08: 00007f9d7154d0a8 R09: 00007f8a74f314f8 [ 2704.546391] R10: 00007f899b548800 R11: 00000000fffffff0 R12: 00007ffcc14d03ec [ 2704.546393] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 2704.546419] Showing all locks held in the system: [ 2704.546439] 1 lock held by khungtaskd/67: [ 2704.546441] #0: (tasklist_lock){.+.+}, at: [<00000000ae7bc74b>] debug_show_all_locks+0x37/0x1a0 [ 2704.546520] 2 locks held by kworker/u16:2/145: [ 2704.546522] #0: ((wq_completion)"events_unbound"){+.+.}, at: [<000000001b0d8f9e>] process_one_work+0x1da/0x6e0 [ 2704.546530] #1: ((work_completion)(&state->commit_work)){+.+.}, at: [<000000001b0d8f9e>] process_one_work+0x1da/0x6e0 [ 2704.546716] 2 locks held by opera-developer/4236: [ 2704.546718] #0: (&type->s_umount_key#4/1){+.+.}, at: [<00000000c6bc71b9>] sget_userns+0x155/0x500 [ 2704.546731] #1: (shrinker_rwsem){++++}, at: [<000000006b6cfc5f>] register_shrinker+0x4a/0xb0 [ 2704.546886] 4 locks held by CPU 0/KVM/7450: [ 2704.546887] #0: (&vcpu->mutex){+.+.}, at: [<000000000bb20b8b>] vcpu_load+0x17/0x60 [kvm] [ 2704.546899] #1: (&kvm->srcu){....}, at: [<000000007181f206>] kvm_arch_vcpu_ioctl_run+0x73c/0x1ba0 [kvm] [ 2704.546915] #2: (&mm->mmap_sem){++++}, at: [<00000000c6f7c4d3>] __gfn_to_pfn_memslot+0x110/0x480 [kvm] [ 2704.546943] #3: (shrinker_rwsem){++++}, at: [<00000000af097e48>] shrink_slab.part.48+0x5b/0x5a0 [ 2704.546957] 2 locks held by file:// Content/8209: [ 2704.546958] #0: (&type->s_umount_key#46){++++}, at: [<000000004e26f718>] deactivate_super+0x33/0x50 [ 2704.546991] #1: (shrinker_rwsem){++++}, at: [<000000009cbdd6d5>] unregister_shrinker+0x1c/0x80 [ 2704.547001] ============================================= -- Best Regards, Mike Gavrilov.