On Sun, Jan 07, 2018 at 01:17:19PM +0200, Nikolay Borisov wrote: > On 6.01.2018 07:10, Adam Borowski wrote: > > Hi! > > I got a reproducible infinite hang, reliably triggered by the testsuite of > > "flatpak"; fails on at least 4.15-rc6, 4.9.75, and on another machine with > > Debian's 4.14.2-1. > > > > [580632.355107] INFO: task kworker/u8:2:11105 blocked for more than 120 > > seconds. > > [580632.355120] Not tainted 4.14.0-1-amd64 #1 Debian 4.14.2-1 > > [580632.355124] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables > > this message. > > [580632.355129] kworker/u8:2 D 0 11105 2 0x80000000 > > [580632.355176] Workqueue: events_unbound > > btrfs_async_reclaim_metadata_space [btrfs] > > [580632.355179] Call Trace: > > [580632.355192] __schedule+0x28e/0x880 > > [580632.355196] schedule+0x2c/0x80 > > [580632.355200] wb_wait_for_completion+0x64/0x90 > > [580632.355205] ? finish_wait+0x80/0x80 > > [580632.355207] __writeback_inodes_sb_nr+0xa1/0xd0 > > [580632.355210] writeback_inodes_sb_nr+0x10/0x20 > > [580632.355235] flush_space+0x3ed/0x520 [btrfs] > > [580632.355238] ? pick_next_task_fair+0x158/0x590 > > [580632.355242] ? __switch_to+0x1f3/0x460 > > [580632.355267] btrfs_async_reclaim_metadata_space+0xf6/0x4a0 [btrfs] > > [580632.355278] process_one_work+0x198/0x390 > > [580632.355281] worker_thread+0x35/0x3c0 > > [580632.355284] kthread+0x125/0x140 > > [580632.355287] ? process_one_work+0x390/0x390 > > [580632.355289] ? kthread_create_on_node+0x70/0x70 > > [580632.355292] ? SyS_exit_group+0x14/0x20 > > [580632.355295] ret_from_fork+0x25/0x30 > > > > The machines are distinct enough that this probably should happen > > everywhere: > > > > AMD Phenom2, SSD, noatime,compress=lzo,space_cache=v2 > > Intel Braswell, rust, noatime,autodefrag,space_cache=v2
It does cause data loss: while everything seems to work ok, files that are written to while there's this stuck worker become size 0 after rebooting. Only after a longish time other processes start getting stuck as well. For this reason, I was reluctant to try on a real system -- but somehow I don't seem to be able to reproduce on minimal VMs. > Provide output of echo w > /proc/sysrq-trigger when the hang happens. [ 5679.403833] INFO: task kworker/u12:2:9904 blocked for more than 120 seconds. [ 5679.413938] Not tainted 4.15.0-rc7-debug-00137-g13f8e1b5cc83 #1 [ 5679.423336] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5679.434136] kworker/u12:2 D 0 9904 2 0x80000000 [ 5679.442528] Workqueue: writeback wb_workfn (flush-btrfs-1) [ 5679.450809] Call Trace: [ 5679.455920] ? __schedule+0x1a5/0x6e0 [ 5679.462251] ? check_preempt_curr+0x74/0x80 [ 5679.468950] ? atomic_t_wait+0x50/0x50 [ 5679.475134] schedule+0x23/0x80 [ 5679.480670] bit_wait+0x8/0x50 [ 5679.485985] __wait_on_bit+0x3d/0x80 [ 5679.491828] ? atomic_t_wait+0x50/0x50 [ 5679.497726] __inode_wait_for_writeback+0x9e/0xc0 [ 5679.504531] ? bit_waitqueue+0x30/0x30 [ 5679.510292] inode_wait_for_writeback+0x18/0x30 [ 5679.516782] evict+0xa4/0x180 [ 5679.521596] btrfs_run_delayed_iputs+0x61/0xb0 [ 5679.527842] btrfs_commit_transaction+0x7b0/0x8c0 [ 5679.534310] ? start_transaction+0xa0/0x390 [ 5679.540151] __writeback_single_inode+0x168/0x1b0 [ 5679.546477] writeback_sb_inodes+0x1be/0x420 [ 5679.552264] wb_writeback+0xe0/0x1d0 [ 5679.557292] wb_workfn+0x7d/0x2c0 [ 5679.561984] ? __switch_to+0x17c/0x370 [ 5679.567045] process_one_work+0x1a7/0x340 [ 5679.572286] worker_thread+0x26/0x3f0 [ 5679.577043] ? create_worker+0x190/0x190 [ 5679.582007] kthread+0x107/0x120 [ 5679.586198] ? kthread_create_worker_on_cpu+0x40/0x40 [ 5679.592200] ? kthread_create_worker_on_cpu+0x40/0x40 [ 5679.598122] ret_from_fork+0x1f/0x30 [ 5679.602549] INFO: task testlibrary:12647 blocked for more than 120 seconds. [ 5679.610434] Not tainted 4.15.0-rc7-debug-00137-g13f8e1b5cc83 #1 [ 5679.617758] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5679.626453] testlibrary D 0 12647 12606 0x00000000 [ 5679.632812] Call Trace: [ 5679.636038] ? __schedule+0x1a5/0x6e0 [ 5679.640483] ? bdi_split_work_to_wbs+0x159/0x290 [ 5679.645881] schedule+0x23/0x80 [ 5679.649790] wb_wait_for_completion+0x39/0x70 [ 5679.654901] ? wait_woken+0x80/0x80 [ 5679.659092] __writeback_inodes_sb_nr+0x95/0xa0 [ 5679.664325] sync_filesystem+0x21/0x80 [ 5679.668797] SyS_syncfs+0x44/0x90 [ 5679.672809] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5679.678136] RIP: 0033:0x7fe82599e057 [ 5679.682405] RSP: 002b:00007ffdfda6cf18 EFLAGS: 00000202 [ 5679.682431] INFO: task pool:14436 blocked for more than 120 seconds. [ 5679.695395] Not tainted 4.15.0-rc7-debug-00137-g13f8e1b5cc83 #1 [ 5679.702499] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5679.711041] pool D 0 14436 1 0x00000000 [ 5679.717217] Call Trace: [ 5679.720280] ? __schedule+0x1a5/0x6e0 [ 5679.724619] ? bdi_split_work_to_wbs+0x159/0x290 [ 5679.729890] schedule+0x23/0x80 [ 5679.733698] wb_wait_for_completion+0x39/0x70 [ 5679.738748] ? wait_woken+0x80/0x80 [ 5679.742899] sync_inodes_sb+0xb4/0x240 [ 5679.747312] sync_filesystem+0x4f/0x80 [ 5679.751709] SyS_syncfs+0x44/0x90 [ 5679.755679] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5679.760935] RIP: 0033:0x7fb356793057 [ 5679.765156] RSP: 002b:00007fb34f2c0128 EFLAGS: 00000202 [ 5679.765173] INFO: task flatpak:14514 blocked for more than 120 seconds. [ 5679.778395] Not tainted 4.15.0-rc7-debug-00137-g13f8e1b5cc83 #1 [ 5679.785540] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5679.794171] flatpak D 0 14514 12658 0x00000000 [ 5679.800390] Call Trace: [ 5679.803440] ? __schedule+0x1a5/0x6e0 [ 5679.807735] ? bdi_split_work_to_wbs+0x159/0x290 [ 5679.813027] schedule+0x23/0x80 [ 5679.816805] wb_wait_for_completion+0x39/0x70 [ 5679.821809] ? wait_woken+0x80/0x80 [ 5679.825948] __writeback_inodes_sb_nr+0x95/0xa0 [ 5679.831133] sync_filesystem+0x21/0x80 [ 5679.835496] SyS_syncfs+0x44/0x90 [ 5679.839442] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5679.844744] RIP: 0033:0x7fe919246057 [ 5679.848965] RSP: 002b:00007fff86bf7288 EFLAGS: 00000202 [ 5679.848976] INFO: task flatpak:14728 blocked for more than 120 seconds. [ 5679.862238] Not tainted 4.15.0-rc7-debug-00137-g13f8e1b5cc83 #1 [ 5679.869360] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5679.877916] flatpak D 0 14728 13226 0x00000000 [ 5679.884129] Call Trace: [ 5679.887207] ? __schedule+0x1a5/0x6e0 [ 5679.891562] ? bdi_split_work_to_wbs+0x159/0x290 [ 5679.896882] schedule+0x23/0x80 [ 5679.900709] wb_wait_for_completion+0x39/0x70 [ 5679.905749] ? wait_woken+0x80/0x80 [ 5679.909916] __writeback_inodes_sb_nr+0x95/0xa0 [ 5679.915162] sync_filesystem+0x21/0x80 [ 5679.919603] SyS_syncfs+0x44/0x90 [ 5679.923599] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5679.928902] RIP: 0033:0x7fae19413057 [ 5679.933150] RSP: 002b:00007ffd3e6bfea8 EFLAGS: 00000246 [ 5679.933164] INFO: task flatpak:14948 blocked for more than 120 seconds. [ 5679.946442] Not tainted 4.15.0-rc7-debug-00137-g13f8e1b5cc83 #1 [ 5679.953577] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5679.962110] flatpak D 0 14948 12759 0x00000000 [ 5679.968382] Call Trace: [ 5679.971453] ? __schedule+0x1a5/0x6e0 [ 5679.975801] ? bdi_split_work_to_wbs+0x159/0x290 [ 5679.981134] schedule+0x23/0x80 [ 5679.984933] wb_wait_for_completion+0x39/0x70 [ 5679.989965] ? wait_woken+0x80/0x80 [ 5679.994163] __writeback_inodes_sb_nr+0x95/0xa0 [ 5679.999365] sync_filesystem+0x21/0x80 [ 5680.003819] SyS_syncfs+0x44/0x90 [ 5680.007781] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5680.013160] RIP: 0033:0x7f478310e057 [ 5680.017421] RSP: 002b:00007ffd73a67218 EFLAGS: 00000246 [ 5680.017433] INFO: task flatpak:15011 blocked for more than 120 seconds. [ 5680.030701] Not tainted 4.15.0-rc7-debug-00137-g13f8e1b5cc83 #1 [ 5680.037822] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 5680.046373] flatpak D 0 15011 12798 0x00000000 [ 5680.052602] Call Trace: [ 5680.055682] ? __schedule+0x1a5/0x6e0 [ 5680.060058] ? bdi_split_work_to_wbs+0x159/0x290 [ 5680.065417] schedule+0x23/0x80 [ 5680.069204] wb_wait_for_completion+0x39/0x70 [ 5680.074290] ? wait_woken+0x80/0x80 [ 5680.078442] __writeback_inodes_sb_nr+0x95/0xa0 [ 5680.083677] sync_filesystem+0x21/0x80 [ 5680.088091] SyS_syncfs+0x44/0x90 [ 5680.092085] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5680.097418] RIP: 0033:0x7f0b36769057 [ 5680.101699] RSP: 002b:00007ffc0da951f8 EFLAGS: 00000246 [ 5693.149233] sysrq: SysRq : Show Blocked State [ 5693.167203] task PC stack pid father [ 5693.177433] kworker/u12:2 D 0 9904 2 0x80000000 [ 5693.187073] Workqueue: writeback wb_workfn (flush-btrfs-1) [ 5693.196725] Call Trace: [ 5693.203260] ? __schedule+0x1a5/0x6e0 [ 5693.211069] ? check_preempt_curr+0x74/0x80 [ 5693.219360] ? atomic_t_wait+0x50/0x50 [ 5693.227185] schedule+0x23/0x80 [ 5693.234390] bit_wait+0x8/0x50 [ 5693.241482] __wait_on_bit+0x3d/0x80 [ 5693.249104] ? atomic_t_wait+0x50/0x50 [ 5693.256882] __inode_wait_for_writeback+0x9e/0xc0 [ 5693.265687] ? bit_waitqueue+0x30/0x30 [ 5693.273489] inode_wait_for_writeback+0x18/0x30 [ 5693.282092] evict+0xa4/0x180 [ 5693.289042] btrfs_run_delayed_iputs+0x61/0xb0 [ 5693.297478] btrfs_commit_transaction+0x7b0/0x8c0 [ 5693.306156] ? start_transaction+0xa0/0x390 [ 5693.314215] __writeback_single_inode+0x168/0x1b0 [ 5693.322824] writeback_sb_inodes+0x1be/0x420 [ 5693.331013] wb_writeback+0xe0/0x1d0 [ 5693.338452] wb_workfn+0x7d/0x2c0 [ 5693.345622] ? __switch_to+0x17c/0x370 [ 5693.353252] process_one_work+0x1a7/0x340 [ 5693.361138] worker_thread+0x26/0x3f0 [ 5693.368673] ? create_worker+0x190/0x190 [ 5693.376459] kthread+0x107/0x120 [ 5693.383532] ? kthread_create_worker_on_cpu+0x40/0x40 [ 5693.392494] ? kthread_create_worker_on_cpu+0x40/0x40 [ 5693.401390] ret_from_fork+0x1f/0x30 [ 5693.408823] testlibrary D 0 12647 12606 0x00000000 [ 5693.418201] Call Trace: [ 5693.424392] ? __schedule+0x1a5/0x6e0 [ 5693.431751] ? bdi_split_work_to_wbs+0x159/0x290 [ 5693.440035] schedule+0x23/0x80 [ 5693.446831] wb_wait_for_completion+0x39/0x70 [ 5693.454857] ? wait_woken+0x80/0x80 [ 5693.462002] __writeback_inodes_sb_nr+0x95/0xa0 [ 5693.470229] sync_filesystem+0x21/0x80 [ 5693.477625] SyS_syncfs+0x44/0x90 [ 5693.484547] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5693.492823] RIP: 0033:0x7fe82599e057 [ 5693.500018] RSP: 002b:00007ffdfda6cf18 EFLAGS: 00000202 [ 5693.500050] pool D 0 14436 1 0x00000000 [ 5693.518253] Call Trace: [ 5693.524294] ? __schedule+0x1a5/0x6e0 [ 5693.531590] ? bdi_split_work_to_wbs+0x159/0x290 [ 5693.539833] schedule+0x23/0x80 [ 5693.546564] wb_wait_for_completion+0x39/0x70 [ 5693.554496] ? wait_woken+0x80/0x80 [ 5693.561468] sync_inodes_sb+0xb4/0x240 [ 5693.568678] sync_filesystem+0x4f/0x80 [ 5693.575860] SyS_syncfs+0x44/0x90 [ 5693.582610] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5693.590716] RIP: 0033:0x7fb356793057 [ 5693.597716] RSP: 002b:00007fb34f2c0128 EFLAGS: 00000202 [ 5693.597721] flatpak D 0 14514 12658 0x00000000 [ 5693.615475] Call Trace: [ 5693.621387] ? __schedule+0x1a5/0x6e0 [ 5693.628482] ? bdi_split_work_to_wbs+0x159/0x290 [ 5693.636552] schedule+0x23/0x80 [ 5693.643158] wb_wait_for_completion+0x39/0x70 [ 5693.650979] ? wait_woken+0x80/0x80 [ 5693.657928] __writeback_inodes_sb_nr+0x95/0xa0 [ 5693.665904] sync_filesystem+0x21/0x80 [ 5693.673110] SyS_syncfs+0x44/0x90 [ 5693.679802] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5693.687858] RIP: 0033:0x7fe919246057 [ 5693.694820] RSP: 002b:00007fff86bf7288 EFLAGS: 00000202 [ 5693.694827] flatpak D 0 14728 13226 0x00000000 [ 5693.712525] Call Trace: [ 5693.718340] ? __schedule+0x1a5/0x6e0 [ 5693.725433] ? bdi_split_work_to_wbs+0x159/0x290 [ 5693.733536] schedule+0x23/0x80 [ 5693.740143] wb_wait_for_completion+0x39/0x70 [ 5693.747989] ? wait_woken+0x80/0x80 [ 5693.754947] __writeback_inodes_sb_nr+0x95/0xa0 [ 5693.762977] sync_filesystem+0x21/0x80 [ 5693.770224] SyS_syncfs+0x44/0x90 [ 5693.777002] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5693.785128] RIP: 0033:0x7fae19413057 [ 5693.792160] RSP: 002b:00007ffd3e6bfea8 EFLAGS: 00000246 [ 5693.792167] flatpak D 0 14948 12759 0x00000000 [ 5693.809982] Call Trace: [ 5693.815894] ? __schedule+0x1a5/0x6e0 [ 5693.823054] ? bdi_split_work_to_wbs+0x159/0x290 [ 5693.831225] schedule+0x23/0x80 [ 5693.837851] wb_wait_for_completion+0x39/0x70 [ 5693.845736] ? wait_woken+0x80/0x80 [ 5693.852727] __writeback_inodes_sb_nr+0x95/0xa0 [ 5693.860862] sync_filesystem+0x21/0x80 [ 5693.868132] SyS_syncfs+0x44/0x90 [ 5693.875017] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5693.883237] RIP: 0033:0x7f478310e057 [ 5693.890352] RSP: 002b:00007ffd73a67218 EFLAGS: 00000246 [ 5693.890357] flatpak D 0 15011 12798 0x00000000 [ 5693.908228] Call Trace: [ 5693.914196] ? __schedule+0x1a5/0x6e0 [ 5693.921402] ? bdi_split_work_to_wbs+0x159/0x290 [ 5693.929611] schedule+0x23/0x80 [ 5693.936316] wb_wait_for_completion+0x39/0x70 [ 5693.944271] ? wait_woken+0x80/0x80 [ 5693.951303] __writeback_inodes_sb_nr+0x95/0xa0 [ 5693.959447] sync_filesystem+0x21/0x80 [ 5693.966778] SyS_syncfs+0x44/0x90 [ 5693.973654] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5693.981816] RIP: 0033:0x7f0b36769057 [ 5693.988935] RSP: 002b:00007ffc0da951f8 EFLAGS: 00000246 [ 5702.930722] sysrq: SysRq : Show Blocked State [ 5702.947430] task PC stack pid father [ 5702.957101] kworker/u12:2 D 0 9904 2 0x80000000 [ 5702.966186] Workqueue: writeback wb_workfn (flush-btrfs-1) [ 5702.975298] Call Trace: [ 5702.981336] ? __schedule+0x1a5/0x6e0 [ 5702.988605] ? check_preempt_curr+0x74/0x80 [ 5702.996390] ? atomic_t_wait+0x50/0x50 [ 5703.003764] schedule+0x23/0x80 [ 5703.010507] bit_wait+0x8/0x50 [ 5703.017144] __wait_on_bit+0x3d/0x80 [ 5703.024270] ? atomic_t_wait+0x50/0x50 [ 5703.031558] __inode_wait_for_writeback+0x9e/0xc0 [ 5703.039822] ? bit_waitqueue+0x30/0x30 [ 5703.047116] inode_wait_for_writeback+0x18/0x30 [ 5703.055205] evict+0xa4/0x180 [ 5703.061698] btrfs_run_delayed_iputs+0x61/0xb0 [ 5703.069695] btrfs_commit_transaction+0x7b0/0x8c0 [ 5703.077970] ? start_transaction+0xa0/0x390 [ 5703.085721] __writeback_single_inode+0x168/0x1b0 [ 5703.093990] writeback_sb_inodes+0x1be/0x420 [ 5703.101817] wb_writeback+0xe0/0x1d0 [ 5703.108935] wb_workfn+0x7d/0x2c0 [ 5703.115764] ? __switch_to+0x17c/0x370 [ 5703.123043] process_one_work+0x1a7/0x340 [ 5703.130546] worker_thread+0x26/0x3f0 [ 5703.137710] ? create_worker+0x190/0x190 [ 5703.145127] kthread+0x107/0x120 [ 5703.151813] ? kthread_create_worker_on_cpu+0x40/0x40 [ 5703.160362] ? kthread_create_worker_on_cpu+0x40/0x40 [ 5703.168870] ret_from_fork+0x1f/0x30 [ 5703.175948] testlibrary D 0 12647 12606 0x00000000 [ 5703.184926] Call Trace: [ 5703.190824] ? __schedule+0x1a5/0x6e0 [ 5703.197950] ? bdi_split_work_to_wbs+0x159/0x290 [ 5703.206098] schedule+0x23/0x80 [ 5703.212732] wb_wait_for_completion+0x39/0x70 [ 5703.220581] ? wait_woken+0x80/0x80 [ 5703.227549] __writeback_inodes_sb_nr+0x95/0xa0 [ 5703.235558] sync_filesystem+0x21/0x80 [ 5703.242793] SyS_syncfs+0x44/0x90 [ 5703.249570] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5703.257666] RIP: 0033:0x7fe82599e057 [ 5703.264707] RSP: 002b:00007ffdfda6cf18 EFLAGS: 00000202 [ 5703.264736] pool D 0 14436 1 0x00000000 [ 5703.282426] Call Trace: [ 5703.288348] ? __schedule+0x1a5/0x6e0 [ 5703.295511] ? bdi_split_work_to_wbs+0x159/0x290 [ 5703.303593] schedule+0x23/0x80 [ 5703.310201] wb_wait_for_completion+0x39/0x70 [ 5703.318023] ? wait_woken+0x80/0x80 [ 5703.325008] sync_inodes_sb+0xb4/0x240 [ 5703.332208] sync_filesystem+0x4f/0x80 [ 5703.339370] SyS_syncfs+0x44/0x90 [ 5703.346100] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5703.354128] RIP: 0033:0x7fb356793057 [ 5703.361128] RSP: 002b:00007fb34f2c0128 EFLAGS: 00000202 [ 5703.361134] flatpak D 0 14514 12658 0x00000000 [ 5703.378754] Call Trace: [ 5703.384622] ? __schedule+0x1a5/0x6e0 [ 5703.391709] ? bdi_split_work_to_wbs+0x159/0x290 [ 5703.399780] schedule+0x23/0x80 [ 5703.406359] wb_wait_for_completion+0x39/0x70 [ 5703.414158] ? wait_woken+0x80/0x80 [ 5703.421041] __writeback_inodes_sb_nr+0x95/0xa0 [ 5703.428961] sync_filesystem+0x21/0x80 [ 5703.436118] SyS_syncfs+0x44/0x90 [ 5703.442782] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5703.450734] RIP: 0033:0x7fe919246057 [ 5703.457664] RSP: 002b:00007fff86bf7288 EFLAGS: 00000202 [ 5703.457670] flatpak D 0 14728 13226 0x00000000 [ 5703.475169] Call Trace: [ 5703.480987] ? __schedule+0x1a5/0x6e0 [ 5703.488057] ? bdi_split_work_to_wbs+0x159/0x290 [ 5703.496106] schedule+0x23/0x80 [ 5703.502667] wb_wait_for_completion+0x39/0x70 [ 5703.510447] ? wait_woken+0x80/0x80 [ 5703.517345] __writeback_inodes_sb_nr+0x95/0xa0 [ 5703.525294] sync_filesystem+0x21/0x80 [ 5703.532447] SyS_syncfs+0x44/0x90 [ 5703.539161] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5703.547197] RIP: 0033:0x7fae19413057 [ 5703.554192] RSP: 002b:00007ffd3e6bfea8 EFLAGS: 00000246 [ 5703.554199] flatpak D 0 14948 12759 0x00000000 [ 5703.571833] Call Trace: [ 5703.577715] ? __schedule+0x1a5/0x6e0 [ 5703.584815] ? bdi_split_work_to_wbs+0x159/0x290 [ 5703.592924] schedule+0x23/0x80 [ 5703.599505] wb_wait_for_completion+0x39/0x70 [ 5703.607337] ? wait_woken+0x80/0x80 [ 5703.614278] __writeback_inodes_sb_nr+0x95/0xa0 [ 5703.622321] sync_filesystem+0x21/0x80 [ 5703.629544] SyS_syncfs+0x44/0x90 [ 5703.636346] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5703.644461] RIP: 0033:0x7f478310e057 [ 5703.651515] RSP: 002b:00007ffd73a67218 EFLAGS: 00000246 [ 5703.651520] flatpak D 0 15011 12798 0x00000000 [ 5703.669280] Call Trace: [ 5703.675215] ? __schedule+0x1a5/0x6e0 [ 5703.682367] ? bdi_split_work_to_wbs+0x159/0x290 [ 5703.690521] schedule+0x23/0x80 [ 5703.697150] wb_wait_for_completion+0x39/0x70 [ 5703.705026] ? wait_woken+0x80/0x80 [ 5703.712000] __writeback_inodes_sb_nr+0x95/0xa0 [ 5703.720071] sync_filesystem+0x21/0x80 [ 5703.727336] SyS_syncfs+0x44/0x90 [ 5703.734134] entry_SYSCALL_64_fastpath+0x17/0x70 [ 5703.742254] RIP: 0033:0x7f0b36769057 [ 5703.749328] RSP: 002b:00007ffc0da951f8 EFLAGS: 00000246 [ 5711.188611] sysrq: SysRq : Resetting Meow! -- How to exploit the Bible for weight loss: Pr28:25: he that putteth his trust in the ʟᴏʀᴅ shall be made fat. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
