PID Namespace 的 Main process 结束 与 zombie child process#
问题#
挂载 PV 的 Pod 长期停留在 Terminating 状态。Linux top 命令显示高于 20% 的 iowait。
如果尝试 kubectl exec -it $POD -- bash 进入 container，会说：
unable to start container process: error executing setns process
Output OCI runtime exec failed: exec failed: container_linux.go:346: starting container process caused "process_linux.go:101: executing setns process caused \"exit status 1\"": unknown
情况调查#
PID Namespace pid tree#
root 15918 1 0 11月03 ? 00:15:32 /usr/local/bin/containerd-shim-runc-v2 -namespace k8s.io -id 7a6d383e2794ab23f2a070 -address /run/containerd/containerd.sock
65535 15939 15918 0 11月03 ? 00:00:00 \_ /pause
47040 22026 15918 0 11月03 ? 00:00:00 \_ [catatonit]
47040 22103 22026 9 11月03 ? 08:59:39 | \_ [prometheus] <defunct>
root 15918 1 0 Nov03 ? 00:15:35 /usr/local/bin/containerd-shim-runc-v2 -namespace k8s.io -id 7a6d383e2794ab23f2a070 -address /run/containerd/containerd.sock
65535 15939 15918 0 Nov03 ? 00:00:00 \_ /pause
47040 22026 15918 0 Nov03 ? 00:00:00 \_ [catatonit]
47040 22103 22026 9 Nov03 ? 08:59:39 | \_ [prometheus] <defunct>
47040 22267 15918 0 Nov03 ? 00:00:00 \_ /usr/bin/catatonit -- /bin/bash -c /initenv
47040 22314 22267 0 Nov03 ? 00:16:42 | \_ /bin/reverseproxy
47040 22531 15918 0 Nov03 ? 00:00:00 \_ /usr/bin/catatonit -- /bin/bash -c /initenv --web.listen-address=0.0.0.0:9085 --volume-dir=/etc/config --webhook-url=http://127.0.0.1:9090/-/reload
47040 22578 22531 0 Nov03 ? 00:01:00 | \_ /bin/configmap-reload --web.listen-address=0.0.0.0:9085 --volume-dir=/etc/config --webhook-url=http://127.0.0.1:9090/-/reload
47040 22787 15918 0 Nov03 ? 00:00:00 \_ /usr/bin/catatonit -- /bin/bash -c /initenv --service-id=com-pm-server --container-name=com-pm-exporter
47040 22859 22787 0 Nov03 ? 00:01:11 \_ /bin/metrics-exporter --service-id=com-pm-server --container-name=com-pm-exporter
## 上面进程 command 带中括号原因：Sometimes the process args will be unavailable; when this happens, ps will instead print the executable name in brackets.
host22055:/proc/22103 # cat stat
22103 (prometheus) Z 22026 22103 22026 0 -1 4228356 20114323 0 227 0 3011373 226613 0 0 20 0 6 0 17708534 0 0 18446744073709551615 0 0 0 0 0 0 1002060288 0 2143420159 0 0 0 17 7 0 0 148 0 0 0 0 0 0 0 0 0 9
host22055:/proc/22103 # cat ../22026/stat
22026 (catatonit) S 15918 22026 22026 0 -1 4195588 481 0 2 0 0 0 0 0 20 0 1 0 17708523 0 0 18446744073709551615 0 0 0 0 0 0 1073478151 65536 0 1 0 0 17 3 0 0 1 0 0 0 0 0 0 0 0 0 9
host22055:/proc/22103 # cat /proc/15939/stat
15939 (pause) S 15918 15939 15939 0 -1 4194560 484 0 0 0 15 1 0 0 20 0 1 0 17700303 1019904 1 18446744073709551615 4194304 4722625 140732205646672 0 0 0 0 0 81922 1 0 0 17 1 0 0 0 0 0 4885568 4907536 8134656 140732205653921 140732205653928 140732205653928 140732205654001 0
user@host22055:~> sudo cat /proc/22026/stack
[<0>] do_wait+0x1bf/0x230
[<0>] kernel_wait4+0x8d/0x140
[<0>] zap_pid_ns_processes+0x103/0x1b0
[<0>] do_exit+0xa44/0xb80
[<0>] do_group_exit+0x3a/0xa0
[<0>] get_signal+0x14a/0x850
[<0>] do_signal+0x36/0x6d0
[<0>] exit_to_usermode_loop+0x8b/0x120
[<0>] do_syscall_64+0x1b9/0x1e0
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
zap_pid_ns_processes 卡的问题调查#
内核函数：
IO 相关线程 Uninterruptible Sleep (D) 状态#
直接原因 Ceph full#
$ dmesg -T
[Mon Nov 7 06:45:09 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:09 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:09 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:15 2022] __submit_request: 19 callbacks suppressed
[Mon Nov 7 06:45:15 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:15 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:15 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:15 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:15 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:27 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:32 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:39 2022] libceph: FULL or reached pool quota
[Mon Nov 7 06:45:46 2022] libceph: FULL or reached pool quota
top 状态#
top -p 8912 -H
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
14096 root 20 0 7400724 1.793g 16108 R 3.667 5.719 0:20.65 vmstorage
8912 root 20 0 7400724 1.793g 16108 D 0.000 5.719 67:48.24 vmstorage
8944 root 20 0 7400724 1.793g 16108 S 0.000 5.719 27:34.23 vmstorage
8945 root 20 0 7400724 1.793g 16108 D 0.000 5.719 130:01.68 vmstorage
8946 root 20 0 7400724 1.793g 16108 S 0.000 5.719 0:00.01 vmstorage
8947 root 20 0 7400724 1.793g 16108 D 0.000 5.719 131:55.40 vmstorage
8948 root 20 0 7400724 1.793g 16108 S 0.000 5.719 0:00.00 vmstorage
8953 root 20 0 7400724 1.793g 16108 S 0.000 5.719 0:00.00 vmstorage
12197 root 20 0 7400724 1.793g 16108 D 0.000 5.719 142:21.44 vmstorage
12459 root 20 0 7400724 1.793g 16108 D 0.000 5.719 139:42.84 vmstorage
12768 root 20 0 7400724 1.793g 16108 D 0.000 5.719 147:45.47 vmstorage
19520 root 20 0 7400724 1.793g 16108 D 0.000 5.719 109:27.62 vmstorage
27824 root 20 0 7400724 1.793g 16108 D 0.000 5.719 55:02.46 vmstorage
14097 root 20 0 7400724 1.793g 16108 D 0.000 5.719 0:00.04 vmstorage
14115 root 20 0 7400724 1.793g 16108 D 0.000 5.719 0:01.82 vmstorage
14161 root 20 0 7400724 1.793g 16108 S 0.000 5.719 0:01.88 vmstorage
列出所有 D 状态的线程#
top - 07:45:10 up 5 days, 20:33, 1 user, load average: 26.22, 26.56, 25.38
Tasks: 479 total, 1 running, 474 sleeping, 0 stopped, 4 zombie
%Cpu(s): 8.5 us, 3.9 sy, 0.0 ni, 32.1 id, 55.1 wa, 0.0 hi, 0.4 si, 0.0 st
MiB Mem : 32106.83+total, 870.090 free, 17359.10+used, 14639.44+buff/cache
MiB Swap: 0.000 total, 0.000 free, 0.000 used. 14747.73+avail Mem
host22055:/proc/22103 # ps -eo ppid,pid,user,stat,pcpu,comm,wchan:32 | grep " D"
2 67 root DN 0.0 khugepaged khugepaged
2 4858 root D 0.0 xfsaild/rbd1 -
2 7620 root D 0.0 xfsaild/rbd3 -
8541 8912 root Dsl 11.2 vmstorage lookup_slow
2 12572 root D 0.0 kworker/u16:1+f -
2 15842 root D 0.0 xfsaild/rbd0 -
2 26317 root D 0.0 kworker/u16:0+f -
列表所有 D 状态的内核 statck#
$ echo w > /proc/sysrq-trigger
$ dmesg -T
[Mon Nov 7 07:48:36 2022] task:khugepaged state:D stack: 0 pid: 67 ppid: 2 flags:0x80004080
[Mon Nov 7 07:48:36 2022] Call Trace:
[Mon Nov 7 07:48:36 2022] __schedule+0x2ff/0x760
[Mon Nov 7 07:48:36 2022] schedule+0x2f/0xa0
[Mon Nov 7 07:48:36 2022] rwsem_down_write_slowpath+0x251/0x620
[Mon Nov 7 07:48:36 2022] ? khugepaged+0xd44/0x2340
[Mon Nov 7 07:48:36 2022] khugepaged+0xd44/0x2340
[Mon Nov 7 07:48:36 2022] ? syscall_return_via_sysret+0x10/0x7f
[Mon Nov 7 07:48:36 2022] ? syscall_return_via_sysret+0x10/0x7f
[Mon Nov 7 07:48:36 2022] ? wait_woken+0x80/0x80
[Mon Nov 7 07:48:36 2022] ? collapse_shmem+0xce0/0xce0
[Mon Nov 7 07:48:36 2022] kthread+0x10d/0x130
[Mon Nov 7 07:48:36 2022] ? kthread_park+0xa0/0xa0
[Mon Nov 7 07:48:36 2022] ret_from_fork+0x35/0x40
[Mon Nov 7 07:48:36 2022] task:xfsaild/rbd3 state:D stack: 0 pid: 7620 ppid: 2 flags:0x80004000
[Mon Nov 7 07:48:36 2022] Call Trace:
[Mon Nov 7 07:48:36 2022] __schedule+0x2ff/0x760
[Mon Nov 7 07:48:36 2022] schedule+0x2f/0xa0
[Mon Nov 7 07:48:36 2022] xlog_wait_on_iclog+0x10d/0x130 [xfs]
[Mon Nov 7 07:48:36 2022] ? wake_up_q+0xa0/0xa0
[Mon Nov 7 07:48:36 2022] xfsaild+0x1dd/0x830 [xfs]
[Mon Nov 7 07:48:36 2022] ? xfs_trans_ail_cursor_first+0x80/0x80 [xfs]
[Mon Nov 7 07:48:36 2022] ? kthread+0x10d/0x130
[Mon Nov 7 07:48:36 2022] kthread+0x10d/0x130
[Mon Nov 7 07:48:36 2022] ? kthread_park+0xa0/0xa0
[Mon Nov 7 07:48:36 2022] ret_from_fork+0x35/0x40
[Mon Nov 7 07:48:36 2022] task:vmstorage state:D stack: 0 pid: 8912 ppid: 8541 flags:0x00000004
[Mon Nov 7 07:48:36 2022] Call Trace:
[Mon Nov 7 07:48:36 2022] __schedule+0x2ff/0x760
[Mon Nov 7 07:48:36 2022] schedule+0x2f/0xa0
[Mon Nov 7 07:48:36 2022] rwsem_down_read_slowpath+0x172/0x300
[Mon Nov 7 07:48:36 2022] ? lookup_slow+0x27/0x50
[Mon Nov 7 07:48:36 2022] lookup_slow+0x27/0x50
[Mon Nov 7 07:48:36 2022] walk_component+0x1c4/0x300
[Mon Nov 7 07:48:36 2022] ? link_path_walk.part.33+0x68/0x510
[Mon Nov 7 07:48:36 2022] ? path_init+0x192/0x320
[Mon Nov 7 07:48:36 2022] path_lookupat+0x6e/0x210
[Mon Nov 7 07:48:36 2022] ? terminate_walk+0x8c/0x100
[Mon Nov 7 07:48:36 2022] filename_lookup+0xb6/0x190
[Mon Nov 7 07:48:36 2022] ? kmem_cache_alloc+0x18a/0x270
[Mon Nov 7 07:48:36 2022] ? getname_flags+0x66/0x1d0
[Mon Nov 7 07:48:36 2022] ? vfs_statx+0x73/0xe0
[Mon Nov 7 07:48:36 2022] vfs_statx+0x73/0xe0
[Mon Nov 7 07:48:36 2022] __do_sys_newfstatat+0x31/0x70
[Mon Nov 7 07:48:36 2022] ? __do_sys_fstatfs+0x2f/0x50
[Mon Nov 7 07:48:36 2022] ? _cond_resched+0x15/0x40
[Mon Nov 7 07:48:36 2022] ? exit_to_usermode_loop+0xc5/0x120
[Mon Nov 7 07:48:36 2022] do_syscall_64+0x5b/0x1e0
[Mon Nov 7 07:48:36 2022] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Mon Nov 7 07:48:36 2022] RIP: 0033:0x4bcd2a
[Mon Nov 7 07:48:36 2022] Code: Bad RIP value.
[Mon Nov 7 07:48:36 2022] RSP: 002b:000000c00162d688 EFLAGS: 00000212 ORIG_RAX: 0000000000000106
[Mon Nov 7 07:48:36 2022] RAX: ffffffffffffffda RBX: 000000c000022000 RCX: 00000000004bcd2a
[Mon Nov 7 07:48:36 2022] RDX: 000000c000114518 RSI: 000000c012bfa500 RDI: ffffffffffffff9c
[Mon Nov 7 07:48:36 2022] RBP: 000000c00162d708 R08: 0000000000000000 R09: 0000000000000000
[Mon Nov 7 07:48:36 2022] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000
[Mon Nov 7 07:48:36 2022] R13: 0000000000000001 R14: 0000000000000015 R15: ffffffffffffffff
[Mon Nov 7 07:48:36 2022] task:vmstorage state:D stack: 0 pid: 8945 ppid: 8541 flags:0x00000004
[Mon Nov 7 07:48:36 2022] Call Trace:
[Mon Nov 7 07:48:36 2022] __schedule+0x2ff/0x760
[Mon Nov 7 07:48:36 2022] schedule+0x2f/0xa0
[Mon Nov 7 07:48:36 2022] schedule_timeout+0x16e/0x2d0
[Mon Nov 7 07:48:36 2022] ? netif_rx_internal+0x41/0x100
[Mon Nov 7 07:48:36 2022] __down+0x91/0xe0
[Mon Nov 7 07:48:36 2022] ? xfs_buf_find.isra.34+0x1e0/0x620 [xfs]
[Mon Nov 7 07:48:36 2022] ? down+0x3b/0x50
[Mon Nov 7 07:48:36 2022] down+0x3b/0x50
[Mon Nov 7 07:48:36 2022] xfs_buf_lock+0x33/0xf0 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_buf_find.isra.34+0x1e0/0x620 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_buf_get_map+0x40/0x2a0 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_buf_read_map+0x28/0x1b0 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_trans_read_buf_map+0xc7/0x340 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_read_agi+0x95/0x140 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_ialloc_read_agi+0x2f/0xd0 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_dialloc+0x10e/0x280 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_ialloc+0x7c/0x530 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_dir_ialloc+0x69/0x200 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_create+0x3e1/0x5a0 [xfs]
[Mon Nov 7 07:48:36 2022] xfs_gencom_create+0x106/0x340 [xfs]
[Mon Nov 7 07:48:36 2022] vfs_mkdir+0x101/0x1b0
[Mon Nov 7 07:48:36 2022] do_mkdirat+0xec/0x120
[Mon Nov 7 07:48:36 2022] do_syscall_64+0x5b/0x1e0
[Mon Nov 7 07:48:36 2022] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[Mon Nov 7 07:48:36 2022] RIP: 0033:0x4bccbb
[Mon Nov 7 07:48:36 2022] Code: Bad RIP value.
[Mon Nov 7 07:48:36 2022] RSP: 002b:000000c00162b6b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000102
[Mon Nov 7 07:48:36 2022] RAX: ffffffffffffffda RBX: 000000c000024800 RCX: 00000000004bccbb
[Mon Nov 7 07:48:36 2022] RDX: 00000000000001ed RSI: 000000c00d076d80 RDI: ffffffffffffff9c
[Mon Nov 7 07:48:36 2022] RBP: 000000c00162b710 R08: 0000000000000000 R09: 0000000000000000
[Mon Nov 7 07:48:36 2022] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
[Mon Nov 7 07:48:36 2022] R13: 0000000000000001 R14: 0000000000000037 R15: ffffffffffffffff
...
[Mon Nov 7 07:48:36 2022] task:read-hotness-tr state:D stack: 0 pid: 7976 ppid: 5642 flags:0x00000024
[Mon Nov 7 07:48:36 2022] Call Trace:
[Mon Nov 7 07:48:36 2022] __schedule+0x2ff/0x760
[Mon Nov 7 07:48:36 2022] schedule+0x2f/0xa0
[Mon Nov 7 07:48:36 2022] io_schedule+0x12/0x40
[Mon Nov 7 07:48:36 2022] wait_on_page_bit+0x13b/0x210
[Mon Nov 7 07:48:36 2022] ? file_fdatawait_range+0x20/0x20
[Mon Nov 7 07:48:36 2022] ? iomap_readpage_actor+0x350/0x350
[Mon Nov 7 07:48:36 2022] iomap_page_mkwrite+0x107/0x150
[Mon Nov 7 07:48:36 2022] __xfs_filemap_fault+0x13a/0x1f0 [xfs]
[Mon Nov 7 07:48:36 2022] ? hrtimer_init_sleeper+0x90/0x90
[Mon Nov 7 07:48:36 2022] do_page_mkwrite+0x3e/0x90
[Mon Nov 7 07:48:36 2022] ? vm_normal_page+0x1a/0xb0
[Mon Nov 7 07:48:36 2022] do_wp_page+0x26e/0x3b0
[Mon Nov 7 07:48:36 2022] __handle_mm_fault+0xc98/0x1260
[Mon Nov 7 07:48:36 2022] handle_mm_fault+0xc4/0x200
[Mon Nov 7 07:48:36 2022] __do_page_fault+0x2ce/0x500
[Mon Nov 7 07:48:36 2022] do_page_fault+0x30/0x110
[Mon Nov 7 07:48:36 2022] page_fault+0x3e/0x50
[Mon Nov 7 07:48:36 2022] RIP: 0033:0x7f2df98b7625
[Mon Nov 7 07:48:36 2022] Code: Bad RIP value.
[Mon Nov 7 07:48:36 2022] RSP: 002b:00007f2dd6dfde10 EFLAGS: 00010246
[Mon Nov 7 07:48:36 2022] RAX: 0000000693ace8e0 RBX: 0000000693ace870 RCX: 00007f2db7559000
[Mon Nov 7 07:48:36 2022] RDX: 0000000072000000 RSI: 00000000f805a5f3 RDI: 00000000004a5661
[Mon Nov 7 07:48:36 2022] RBP: 0000000000000072 R08: 00000000004a5661 R09: 0000000693ace850
[Mon Nov 7 07:48:36 2022] R10: 0000000693ace8b0 R11: 00000000d2759d0e R12: 0000000000000000
[Mon Nov 7 07:48:36 2022] R13: 00000006a9197f78 R14: 00000000d5df4a69 R15: 00007f2de7d3d000
[Mon Nov 7 07:48:36 2022] task:kworker/u16:0 state:D stack: 0 pid:26317 ppid: 2 flags:0x80004000
[Mon Nov 7 07:48:36 2022] Workqueue: writeback wb_workfn (flush-254:16)
[Mon Nov 7 07:48:36 2022] Call Trace:
[Mon Nov 7 07:48:36 2022] __schedule+0x2ff/0x760
[Mon Nov 7 07:48:36 2022] schedule+0x2f/0xa0
[Mon Nov 7 07:48:36 2022] io_schedule+0x12/0x40
[Mon Nov 7 07:48:36 2022] __lock_page+0x126/0x210
[Mon Nov 7 07:48:36 2022] ? file_fdatawait_range+0x20/0x20
[Mon Nov 7 07:48:36 2022] write_cache_pages+0x2c5/0x400
[Mon Nov 7 07:48:36 2022] ? xfs_vm_writepages+0xa0/0xa0 [xfs]
[Mon Nov 7 07:48:36 2022] ? update_load_avg+0x1ac/0x5f0
[Mon Nov 7 07:48:36 2022] ? update_blocked_averages+0x297/0x520
[Mon Nov 7 07:48:36 2022] xfs_vm_writepages+0x64/0xa0 [xfs]
[Mon Nov 7 07:48:36 2022] do_writepages+0x4b/0xe0
[Mon Nov 7 07:48:36 2022] ? __writeback_single_inode+0x39/0x300
[Mon Nov 7 07:48:36 2022] __writeback_single_inode+0x39/0x300
[Mon Nov 7 07:48:36 2022] writeback_sb_inodes+0x1ad/0x4b0
[Mon Nov 7 07:48:36 2022] __writeback_inodes_wb+0x5d/0xb0
[Mon Nov 7 07:48:36 2022] wb_writeback+0x25e/0x2f0
[Mon Nov 7 07:48:36 2022] ? wb_workfn+0x23c/0x4e0
[Mon Nov 7 07:48:36 2022] wb_workfn+0x23c/0x4e0
[Mon Nov 7 07:48:36 2022] ? finish_task_switch+0x7e/0x2a0
[Mon Nov 7 07:48:36 2022] ? process_one_work+0x1f4/0x3e0
[Mon Nov 7 07:48:36 2022] ? inode_wait_for_writeback+0x30/0x30
[Mon Nov 7 07:48:36 2022] process_one_work+0x1f4/0x3e0
[Mon Nov 7 07:48:36 2022] worker_thread+0x2d/0x3e0
[Mon Nov 7 07:48:36 2022] ? process_one_work+0x3e0/0x3e0
[Mon Nov 7 07:48:36 2022] kthread+0x10d/0x130
[Mon Nov 7 07:48:36 2022] ? kthread_park+0xa0/0xa0
[Mon Nov 7 07:48:36 2022] ret_from_fork+0x35/0x40
[Mon Nov 7 07:48:36 2022] task:kworker/u16:1 state:D stack: 0 pid:12572 ppid: 2 flags:0x80004000
[Mon Nov 7 07:48:36 2022] Workqueue: writeback wb_workfn (flush-254:0)
[Mon Nov 7 07:48:36 2022] Call Trace:
[Mon Nov 7 07:48:36 2022] __schedule+0x2ff/0x760
[Mon Nov 7 07:48:36 2022] schedule+0x2f/0xa0
[Mon Nov 7 07:48:36 2022] io_schedule+0x12/0x40
[Mon Nov 7 07:48:36 2022] __lock_page+0x126/0x210
[Mon Nov 7 07:48:36 2022] ? file_fdatawait_range+0x20/0x20
[Mon Nov 7 07:48:36 2022] write_cache_pages+0x2c5/0x400
[Mon Nov 7 07:48:36 2022] ? xfs_vm_writepages+0xa0/0xa0 [xfs]
[Mon Nov 7 07:48:36 2022] ? blk_mq_dispatch_rq_list+0x2ae/0x670
[Mon Nov 7 07:48:36 2022] ? bfq_dispatch_request+0x211/0xfa0
[Mon Nov 7 07:48:36 2022] xfs_vm_writepages+0x64/0xa0 [xfs]
[Mon Nov 7 07:48:36 2022] do_writepages+0x4b/0xe0
[Mon Nov 7 07:48:36 2022] ? __blk_mq_sched_dispatch_requests+0x151/0x170
[Mon Nov 7 07:48:36 2022] ? __writeback_single_inode+0x39/0x300
[Mon Nov 7 07:48:36 2022] __writeback_single_inode+0x39/0x300
[Mon Nov 7 07:48:36 2022] writeback_sb_inodes+0x1ad/0x4b0
[Mon Nov 7 07:48:36 2022] __writeback_inodes_wb+0x5d/0xb0
[Mon Nov 7 07:48:36 2022] wb_writeback+0x25e/0x2f0
[Mon Nov 7 07:48:36 2022] ? wb_workfn+0x23c/0x4e0
[Mon Nov 7 07:48:36 2022] wb_workfn+0x23c/0x4e0
[Mon Nov 7 07:48:36 2022] ? __switch_to_asm+0x34/0x70
[Mon Nov 7 07:48:36 2022] ? __switch_to_asm+0x34/0x70
[Mon Nov 7 07:48:36 2022] ? __switch_to_asm+0x40/0x70
[Mon Nov 7 07:48:36 2022] ? __switch_to_asm+0x34/0x70
[Mon Nov 7 07:48:36 2022] ? __switch_to_asm+0x40/0x70
[Mon Nov 7 07:48:36 2022] ? __switch_to_asm+0x34/0x70
[Mon Nov 7 07:48:36 2022] ? __switch_to_asm+0x40/0x70
[Mon Nov 7 07:48:36 2022] ? process_one_work+0x1f4/0x3e0
[Mon Nov 7 07:48:36 2022] ? inode_wait_for_writeback+0x30/0x30
[Mon Nov 7 07:48:36 2022] process_one_work+0x1f4/0x3e0
[Mon Nov 7 07:48:36 2022] worker_thread+0x2d/0x3e0
[Mon Nov 7 07:48:36 2022] ? process_one_work+0x3e0/0x3e0
[Mon Nov 7 07:48:36 2022] kthread+0x10d/0x130
[Mon Nov 7 07:48:36 2022] ? kthread_park+0xa0/0xa0
[Mon Nov 7 07:48:36 2022] ret_from_fork+0x35/0x40