* [linux-lvm] vgchange acquire an exclusive VG lock for refresh
@ 2023-08-29 3:53 wangzhiqiang (Q)
2023-08-29 6:36 ` wangzhiqiang (Q)
0 siblings, 1 reply; 4+ messages in thread
From: wangzhiqiang (Q) @ 2023-08-29 3:53 UTC (permalink / raw)
To: linux-lvm; +Cc: lixiaokeng, louhongxiang
I've got an issue while execute vgchange --refresh concurrently, process vgchange and systemd-udevd
enters the D state.
root 2933 0.0 1.0 54216 31344 pts/1 D<L 11:21 0:00 vgchange --refresh
root 2934 0.0 1.1 54216 32788 pts/1 D<L 11:21 0:00 vgchange --refresh
root 2935 0.0 1.0 54216 31496 pts/1 D<L 11:21 0:00 vgchange --refresh
root 2937 0.0 1.0 54216 31500 pts/1 S<L 11:21 0:00 vgchange --refresh
root 2951 0.0 0.0 0 0 ? D 11:21 0:00 [systemd-udevd]
root 2952 0.0 0.0 0 0 ? D 11:21 0:00 [systemd-udevd]
process stack as follows
[root@localhost ~]# cat /proc/2937/stack
[<0>] dm_wait_for_bios_completion+0x298/0x340 [dm_mod]
[<0>] dm_wait_for_completion+0xfe/0x110 [dm_mod]
[<0>] __dm_suspend+0xd0/0x310 [dm_mod]
[<0>] dm_suspend+0x133/0x180 [dm_mod]
[<0>] dev_suspend+0x115/0x150 [dm_mod]
[<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
[<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
[<0>] __se_sys_ioctl+0xeb/0x120
[<0>] do_syscall_64+0x30/0x40
[<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
[root@localhost ~]# cat /proc/2935/stack
[<0>] dm_suspend+0x2b/0x180 [dm_mod]
[<0>] dev_suspend+0x115/0x150 [dm_mod]
[<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
[<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
[<0>] __se_sys_ioctl+0xeb/0x120
[<0>] do_syscall_64+0x30/0x40
[<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
[root@localhost ~]# cat /proc/2951/stack
[<0>] __lock_page+0x25a/0x7a0
[<0>] truncate_inode_pages_range+0xc52/0x1370
[<0>] __blkdev_put+0x15b/0x3f0
[<0>] blkdev_close+0x49/0x60
[<0>] __fput+0x1b9/0x480
[<0>] task_work_run+0xad/0xf0
[<0>] do_exit+0x47f/0x810
[<0>] do_group_exit+0x77/0x150
[<0>] get_signal+0x2a2/0xa60
[<0>] arch_do_signal_or_restart+0x1c6/0x310
[<0>] exit_to_user_mode_loop+0xdb/0x100
[<0>] exit_to_user_mode_prepare+0x7e/0x90
[<0>] syscall_exit_to_user_mode+0x12/0x40
[<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
I recommend get an exclusive lock when vgchange --refresh.
From 7ddadf2bbbe0383893ab8f5b7cb8d51ebf7a5ed4 Mon Sep 17 00:00:00 2001
From: wangzhiqiang <wangzhiqiang95@huawei.com>
Date: Tue, 29 Aug 2023 10:28:15 +0800
Subject: [PATCH] vgchange acquire an exclusive VG lock for refresh.
Let's run the following test cases, we've got hungtask.
P2 or P3 can't suspend snap and udevd also can't read
device info because real or cow has been suspend.
P1(vgchange) P2(vgchange) P3(vgchange)
--------------------------------------------------------
suspend real
suspend cow
suspend snap
suspend snap
suspend snap
function query()
{
while true
do
vgchange --refresh
done
}
query 1 &> /dev/null &
query 2 &> /dev/null &
query 3 &> /dev/null &
[ 247.250669] INFO: task vgchange:2934 blocked for more than 122 seconds.
[ 247.251935] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 247.252619] task:vgchange state:D stack: 0 pid: 2934 ppid: 2930 flags:0x00000080
[ 247.252626] Call Trace:
[ 247.252633] __schedule+0x547/0xe80
[ 247.252640] ? io_schedule_timeout+0xb0/0xb0
[ 247.252647] ? _raw_spin_lock+0x7a/0xd0
[ 247.252652] schedule+0x6f/0x130
[ 247.252658] schedule_preempt_disabled+0xa/0x10
[ 247.252664] __mutex_lock.constprop.0+0x311/0x700
[ 247.252673] ? kernel_text_address.part.0+0xb9/0xc0
[ 247.252678] ? ww_mutex_unlock+0x50/0x50
[ 247.252685] ? unwind_get_return_address+0x33/0x50
[ 247.252692] ? cred_has_capability.isra.0+0x14b/0x220
[ 247.252698] ? check_nnp_nosuid.isra.0+0x170/0x170
[ 247.252704] mutex_lock+0x114/0x130
[ 247.252710] ? __mutex_lock_slowpath+0x10/0x10
[ 247.252716] ? rwsem_down_write_slowpath+0x830/0x830
[ 247.252733] ? dm_get+0x40/0x70 [dm_mod]
[ 247.252752] ? dm_get_md+0xb3/0x120 [dm_mod]
[ 247.252770] dm_suspend+0x2b/0x180 [dm_mod]
[ 247.252788] dev_suspend+0x115/0x150 [dm_mod]
[ 247.252805] ctl_ioctl+0x320/0x4c0 [dm_mod]
[ 247.252823] ? dev_set_geometry+0x290/0x290 [dm_mod]
[ 247.252841] ? copy_params+0x2e0/0x2e0 [dm_mod]
[ 247.252846] ? locks_dispose_list+0xa0/0xd0
[ 247.252851] ? locks_remove_posix+0x24f/0x340
[ 247.252856] ? locks_remove_flock+0x1e6/0x250
[ 247.252865] ? ioctl_fiemap.isra.0+0x110/0x1e0
[ 247.252872] ? vfs_write+0x2a5/0x440
[ 247.252877] ? selinux_file_ioctl+0x89/0x1c0
[ 247.252895] ? ctl_ioctl+0x4c0/0x4c0 [dm_mod]
[ 247.252912] dm_ctl_ioctl+0x26/0x40 [dm_mod]
[ 247.252918] __se_sys_ioctl+0xeb/0x120
[ 247.252923] do_syscall_64+0x30/0x40
[ 247.252929] entry_SYSCALL_64_after_hwframe+0x61/0xc6
[ 247.252967] INFO: task vgchange:2935 blocked for more than 122 seconds.
[ 247.254242] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 247.254909] task:vgchange state:D stack: 0 pid: 2935 ppid: 2931 flags:0x00000080
[ 247.254922] Call Trace:
[ 247.254929] __schedule+0x547/0xe80
[ 247.254935] ? io_schedule_timeout+0xb0/0xb0
[ 247.254942] ? _raw_spin_lock+0x7a/0xd0
[ 247.254947] schedule+0x6f/0x130
[ 247.254953] schedule_preempt_disabled+0xa/0x10
[ 247.254959] __mutex_lock.constprop.0+0x311/0x700
[ 247.254965] ? kernel_text_address.part.0+0xb9/0xc0
[ 247.254976] ? ww_mutex_unlock+0x50/0x50
[ 247.254981] ? unwind_get_return_address+0x33/0x50
[ 247.254988] ? cred_has_capability.isra.0+0x14b/0x220
[ 247.254995] ? check_nnp_nosuid.isra.0+0x170/0x170
[ 247.255000] mutex_lock+0x114/0x130
[ 247.255006] ? __mutex_lock_slowpath+0x10/0x10
[ 247.255012] ? rwsem_down_write_slowpath+0x830/0x830
[ 247.255029] ? dm_get+0x40/0x70 [dm_mod]
[ 247.255052] ? dm_get_md+0xb3/0x120 [dm_mod]
[ 247.255069] dm_suspend+0x2b/0x180 [dm_mod]
[ 247.255088] dev_suspend+0x115/0x150 [dm_mod]
[ 247.255113] ctl_ioctl+0x320/0x4c0 [dm_mod]
[ 247.255142] ? dev_set_geometry+0x290/0x290 [dm_mod]
[ 247.255160] ? copy_params+0x2e0/0x2e0 [dm_mod]
[ 247.255175] ? nohz_balance_exit_idle+0x2b/0x160
[ 247.255187] ? rb_insert_color+0x2a/0x280
[ 247.255196] ? ioctl_fiemap.isra.0+0x110/0x1e0
[ 247.255202] ? selinux_file_ioctl+0x89/0x1c0
[ 247.255219] ? ctl_ioctl+0x4c0/0x4c0 [dm_mod]
[ 247.255238] dm_ctl_ioctl+0x26/0x40 [dm_mod]
[ 247.255250] __se_sys_ioctl+0xeb/0x120
[ 247.255255] do_syscall_64+0x30/0x40
[ 247.255262] entry_SYSCALL_64_after_hwframe+0x61/0xc6
[ 493.015195] INFO: task systemd-udevd:2951 blocked for more than 122 seconds.
[ 493.016461] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 493.017131] task:systemd-udevd state:D stack: 0 pid: 2951 ppid: 719 flags:0x000043a6
[ 493.017138] Call Trace:
[ 493.017145] __schedule+0x547/0xe80
[ 493.017152] ? io_schedule_timeout+0xb0/0xb0
[ 493.017157] ? orc_find.part.0+0x240/0x240
[ 493.017163] ? get_stack_info_noinstr+0x16/0x140
[ 493.017171] ? bpf_ksym_find+0xc0/0x110
[ 493.017189] schedule+0x6f/0x130
[ 493.017195] io_schedule+0x6d/0xa0
[ 493.017202] __lock_page+0x25a/0x7a0
[ 493.017209] ? wait_on_page_bit_killable+0x6c0/0x6c0
[ 493.017216] ? __lock_page_or_retry+0x3e0/0x3e0
[ 493.017222] ? add_to_page_cache_lru+0x370/0x370
[ 493.017231] truncate_inode_pages_range+0xc52/0x1370
[ 493.017242] ? generic_error_remove_page+0x90/0x90
[ 493.017248] ? __filemap_fdatawait_range+0x179/0x270
[ 493.017256] ? filemap_range_has_page+0x170/0x170
[ 493.017264] ? __bitmap_or_equal+0x89/0x120
[ 493.017271] ? _find_next_bit.constprop.0+0xde/0x120
[ 493.017279] ? cpumask_next+0x2c/0x40
[ 493.017287] ? smp_call_function_many_cond+0x430/0x5f0
[ 493.017295] ? touch_buffer+0xa0/0xa0
[ 493.017305] ? __find_get_block+0x110/0x110
[ 493.017311] ? __find_get_block+0x110/0x110
[ 493.017316] ? touch_buffer+0xa0/0xa0
[ 493.017322] __blkdev_put+0x15b/0x3f0
[ 493.017328] ? blkdev_put+0x1c0/0x1c0
[ 493.017333] blkdev_close+0x49/0x60
[ 493.017339] __fput+0x1b9/0x480
[ 493.017346] task_work_run+0xad/0xf0
[ 493.017354] do_exit+0x47f/0x810
[ 493.017361] ? exit_mm+0x450/0x450
[ 493.017371] ? _raw_spin_lock_irq+0x7b/0xd0
[ 493.017377] do_group_exit+0x77/0x150
[ 493.017384] get_signal+0x2a2/0xa60
[ 493.017393] arch_do_signal_or_restart+0x1c6/0x310
[ 493.017399] ? get_sigframe_size+0x20/0x20
[ 493.017405] ? vfs_read+0x1f6/0x2d0
[ 493.017411] ? unroll_tree_refs+0x18a/0x1e0
[ 493.017424] exit_to_user_mode_loop+0xdb/0x100
[ 493.017430] exit_to_user_mode_prepare+0x7e/0x90
[ 493.017438] syscall_exit_to_user_mode+0x12/0x40
[ 493.017445] entry_SYSCALL_64_after_hwframe+0x61/0xc6
cat /proc/2937/stack
[<0>] dm_wait_for_bios_completion+0x298/0x340 [dm_mod]
[<0>] dm_wait_for_completion+0xfe/0x110 [dm_mod]
[<0>] __dm_suspend+0xd0/0x310 [dm_mod]
[<0>] dm_suspend+0x133/0x180 [dm_mod]
[<0>] dev_suspend+0x115/0x150 [dm_mod]
[<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
[<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
[<0>] __se_sys_ioctl+0xeb/0x120
[<0>] do_syscall_64+0x30/0x40
[<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
Signed-off-by: wangzhiqiang <wangzhiqiang95@huawei.com>
---
tools/vgchange.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/vgchange.c b/tools/vgchange.c
index e4b57db..eb3096d 100644
--- a/tools/vgchange.c
+++ b/tools/vgchange.c
@@ -837,7 +837,7 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
cmd->lockd_vg_enforce_sh = 1;
}
- if (update)
+ if (update || arg_is_set(cmd, refresh_ARG))
flags |= READ_FOR_UPDATE;
else if (arg_is_set(cmd, activate_ARG))
flags |= READ_FOR_ACTIVATE;
--
2.33.0
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [linux-lvm] vgchange acquire an exclusive VG lock for refresh
2023-08-29 3:53 [linux-lvm] vgchange acquire an exclusive VG lock for refresh wangzhiqiang (Q)
@ 2023-08-29 6:36 ` wangzhiqiang (Q)
2023-08-29 21:41 ` David Teigland
2023-08-30 2:14 ` wangzhiqiang (Q)
0 siblings, 2 replies; 4+ messages in thread
From: wangzhiqiang (Q) @ 2023-08-29 6:36 UTC (permalink / raw)
To: linux-lvm; +Cc: lixiaokeng, louhongxiang
Patches based on the latest version:
---
tools/vgchange.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/vgchange.c b/tools/vgchange.c
index f07b245bd..f35ff4c0e 100644
--- a/tools/vgchange.c
+++ b/tools/vgchange.c
@@ -1003,7 +1003,7 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
init_external_device_info_source(DEV_EXT_NONE);
}
- if (update)
+ if (update || arg_is_set(cmd, refresh_ARG))
flags |= READ_FOR_UPDATE;
else if (arg_is_set(cmd, activate_ARG))
flags |= READ_FOR_ACTIVATE;
--
2.33.0
在 2023/8/29 11:53, wangzhiqiang (Q) 写道:
> I've got an issue while execute vgchange --refresh concurrently, process vgchange and systemd-udevd
> enters the D state.
> root 2933 0.0 1.0 54216 31344 pts/1 D<L 11:21 0:00 vgchange --refresh
> root 2934 0.0 1.1 54216 32788 pts/1 D<L 11:21 0:00 vgchange --refresh
> root 2935 0.0 1.0 54216 31496 pts/1 D<L 11:21 0:00 vgchange --refresh
> root 2937 0.0 1.0 54216 31500 pts/1 S<L 11:21 0:00 vgchange --refresh
> root 2951 0.0 0.0 0 0 ? D 11:21 0:00 [systemd-udevd]
> root 2952 0.0 0.0 0 0 ? D 11:21 0:00 [systemd-udevd]
>
> process stack as follows
> [root@localhost ~]# cat /proc/2937/stack
> [<0>] dm_wait_for_bios_completion+0x298/0x340 [dm_mod]
> [<0>] dm_wait_for_completion+0xfe/0x110 [dm_mod]
> [<0>] __dm_suspend+0xd0/0x310 [dm_mod]
> [<0>] dm_suspend+0x133/0x180 [dm_mod]
> [<0>] dev_suspend+0x115/0x150 [dm_mod]
> [<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
> [<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
> [<0>] __se_sys_ioctl+0xeb/0x120
> [<0>] do_syscall_64+0x30/0x40
> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
> [root@localhost ~]# cat /proc/2935/stack
> [<0>] dm_suspend+0x2b/0x180 [dm_mod]
> [<0>] dev_suspend+0x115/0x150 [dm_mod]
> [<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
> [<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
> [<0>] __se_sys_ioctl+0xeb/0x120
> [<0>] do_syscall_64+0x30/0x40
> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
> [root@localhost ~]# cat /proc/2951/stack
> [<0>] __lock_page+0x25a/0x7a0
> [<0>] truncate_inode_pages_range+0xc52/0x1370
> [<0>] __blkdev_put+0x15b/0x3f0
> [<0>] blkdev_close+0x49/0x60
> [<0>] __fput+0x1b9/0x480
> [<0>] task_work_run+0xad/0xf0
> [<0>] do_exit+0x47f/0x810
> [<0>] do_group_exit+0x77/0x150
> [<0>] get_signal+0x2a2/0xa60
> [<0>] arch_do_signal_or_restart+0x1c6/0x310
> [<0>] exit_to_user_mode_loop+0xdb/0x100
> [<0>] exit_to_user_mode_prepare+0x7e/0x90
> [<0>] syscall_exit_to_user_mode+0x12/0x40
> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>
> I recommend get an exclusive lock when vgchange --refresh.
>
>>From 7ddadf2bbbe0383893ab8f5b7cb8d51ebf7a5ed4 Mon Sep 17 00:00:00 2001
> From: wangzhiqiang <wangzhiqiang95@huawei.com>
> Date: Tue, 29 Aug 2023 10:28:15 +0800
> Subject: [PATCH] vgchange acquire an exclusive VG lock for refresh.
>
> Let's run the following test cases, we've got hungtask.
> P2 or P3 can't suspend snap and udevd also can't read
> device info because real or cow has been suspend.
>
> P1(vgchange) P2(vgchange) P3(vgchange)
> --------------------------------------------------------
> suspend real
> suspend cow
> suspend snap
> suspend snap
> suspend snap
>
> function query()
> {
> while true
> do
> vgchange --refresh
> done
> }
>
> query 1 &> /dev/null &
> query 2 &> /dev/null &
> query 3 &> /dev/null &
>
> [ 247.250669] INFO: task vgchange:2934 blocked for more than 122 seconds.
> [ 247.251935] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 247.252619] task:vgchange state:D stack: 0 pid: 2934 ppid: 2930 flags:0x00000080
> [ 247.252626] Call Trace:
> [ 247.252633] __schedule+0x547/0xe80
> [ 247.252640] ? io_schedule_timeout+0xb0/0xb0
> [ 247.252647] ? _raw_spin_lock+0x7a/0xd0
> [ 247.252652] schedule+0x6f/0x130
> [ 247.252658] schedule_preempt_disabled+0xa/0x10
> [ 247.252664] __mutex_lock.constprop.0+0x311/0x700
> [ 247.252673] ? kernel_text_address.part.0+0xb9/0xc0
> [ 247.252678] ? ww_mutex_unlock+0x50/0x50
> [ 247.252685] ? unwind_get_return_address+0x33/0x50
> [ 247.252692] ? cred_has_capability.isra.0+0x14b/0x220
> [ 247.252698] ? check_nnp_nosuid.isra.0+0x170/0x170
> [ 247.252704] mutex_lock+0x114/0x130
> [ 247.252710] ? __mutex_lock_slowpath+0x10/0x10
> [ 247.252716] ? rwsem_down_write_slowpath+0x830/0x830
> [ 247.252733] ? dm_get+0x40/0x70 [dm_mod]
> [ 247.252752] ? dm_get_md+0xb3/0x120 [dm_mod]
> [ 247.252770] dm_suspend+0x2b/0x180 [dm_mod]
> [ 247.252788] dev_suspend+0x115/0x150 [dm_mod]
> [ 247.252805] ctl_ioctl+0x320/0x4c0 [dm_mod]
> [ 247.252823] ? dev_set_geometry+0x290/0x290 [dm_mod]
> [ 247.252841] ? copy_params+0x2e0/0x2e0 [dm_mod]
> [ 247.252846] ? locks_dispose_list+0xa0/0xd0
> [ 247.252851] ? locks_remove_posix+0x24f/0x340
> [ 247.252856] ? locks_remove_flock+0x1e6/0x250
> [ 247.252865] ? ioctl_fiemap.isra.0+0x110/0x1e0
> [ 247.252872] ? vfs_write+0x2a5/0x440
> [ 247.252877] ? selinux_file_ioctl+0x89/0x1c0
> [ 247.252895] ? ctl_ioctl+0x4c0/0x4c0 [dm_mod]
> [ 247.252912] dm_ctl_ioctl+0x26/0x40 [dm_mod]
> [ 247.252918] __se_sys_ioctl+0xeb/0x120
> [ 247.252923] do_syscall_64+0x30/0x40
> [ 247.252929] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>
> [ 247.252967] INFO: task vgchange:2935 blocked for more than 122 seconds.
> [ 247.254242] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 247.254909] task:vgchange state:D stack: 0 pid: 2935 ppid: 2931 flags:0x00000080
> [ 247.254922] Call Trace:
> [ 247.254929] __schedule+0x547/0xe80
> [ 247.254935] ? io_schedule_timeout+0xb0/0xb0
> [ 247.254942] ? _raw_spin_lock+0x7a/0xd0
> [ 247.254947] schedule+0x6f/0x130
> [ 247.254953] schedule_preempt_disabled+0xa/0x10
> [ 247.254959] __mutex_lock.constprop.0+0x311/0x700
> [ 247.254965] ? kernel_text_address.part.0+0xb9/0xc0
> [ 247.254976] ? ww_mutex_unlock+0x50/0x50
> [ 247.254981] ? unwind_get_return_address+0x33/0x50
> [ 247.254988] ? cred_has_capability.isra.0+0x14b/0x220
> [ 247.254995] ? check_nnp_nosuid.isra.0+0x170/0x170
> [ 247.255000] mutex_lock+0x114/0x130
> [ 247.255006] ? __mutex_lock_slowpath+0x10/0x10
> [ 247.255012] ? rwsem_down_write_slowpath+0x830/0x830
> [ 247.255029] ? dm_get+0x40/0x70 [dm_mod]
> [ 247.255052] ? dm_get_md+0xb3/0x120 [dm_mod]
> [ 247.255069] dm_suspend+0x2b/0x180 [dm_mod]
> [ 247.255088] dev_suspend+0x115/0x150 [dm_mod]
> [ 247.255113] ctl_ioctl+0x320/0x4c0 [dm_mod]
> [ 247.255142] ? dev_set_geometry+0x290/0x290 [dm_mod]
> [ 247.255160] ? copy_params+0x2e0/0x2e0 [dm_mod]
> [ 247.255175] ? nohz_balance_exit_idle+0x2b/0x160
> [ 247.255187] ? rb_insert_color+0x2a/0x280
> [ 247.255196] ? ioctl_fiemap.isra.0+0x110/0x1e0
> [ 247.255202] ? selinux_file_ioctl+0x89/0x1c0
> [ 247.255219] ? ctl_ioctl+0x4c0/0x4c0 [dm_mod]
> [ 247.255238] dm_ctl_ioctl+0x26/0x40 [dm_mod]
> [ 247.255250] __se_sys_ioctl+0xeb/0x120
> [ 247.255255] do_syscall_64+0x30/0x40
> [ 247.255262] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>
> [ 493.015195] INFO: task systemd-udevd:2951 blocked for more than 122 seconds.
> [ 493.016461] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 493.017131] task:systemd-udevd state:D stack: 0 pid: 2951 ppid: 719 flags:0x000043a6
> [ 493.017138] Call Trace:
> [ 493.017145] __schedule+0x547/0xe80
> [ 493.017152] ? io_schedule_timeout+0xb0/0xb0
> [ 493.017157] ? orc_find.part.0+0x240/0x240
> [ 493.017163] ? get_stack_info_noinstr+0x16/0x140
> [ 493.017171] ? bpf_ksym_find+0xc0/0x110
> [ 493.017189] schedule+0x6f/0x130
> [ 493.017195] io_schedule+0x6d/0xa0
> [ 493.017202] __lock_page+0x25a/0x7a0
> [ 493.017209] ? wait_on_page_bit_killable+0x6c0/0x6c0
> [ 493.017216] ? __lock_page_or_retry+0x3e0/0x3e0
> [ 493.017222] ? add_to_page_cache_lru+0x370/0x370
> [ 493.017231] truncate_inode_pages_range+0xc52/0x1370
> [ 493.017242] ? generic_error_remove_page+0x90/0x90
> [ 493.017248] ? __filemap_fdatawait_range+0x179/0x270
> [ 493.017256] ? filemap_range_has_page+0x170/0x170
> [ 493.017264] ? __bitmap_or_equal+0x89/0x120
> [ 493.017271] ? _find_next_bit.constprop.0+0xde/0x120
> [ 493.017279] ? cpumask_next+0x2c/0x40
> [ 493.017287] ? smp_call_function_many_cond+0x430/0x5f0
> [ 493.017295] ? touch_buffer+0xa0/0xa0
> [ 493.017305] ? __find_get_block+0x110/0x110
> [ 493.017311] ? __find_get_block+0x110/0x110
> [ 493.017316] ? touch_buffer+0xa0/0xa0
> [ 493.017322] __blkdev_put+0x15b/0x3f0
> [ 493.017328] ? blkdev_put+0x1c0/0x1c0
> [ 493.017333] blkdev_close+0x49/0x60
> [ 493.017339] __fput+0x1b9/0x480
> [ 493.017346] task_work_run+0xad/0xf0
> [ 493.017354] do_exit+0x47f/0x810
> [ 493.017361] ? exit_mm+0x450/0x450
> [ 493.017371] ? _raw_spin_lock_irq+0x7b/0xd0
> [ 493.017377] do_group_exit+0x77/0x150
> [ 493.017384] get_signal+0x2a2/0xa60
> [ 493.017393] arch_do_signal_or_restart+0x1c6/0x310
> [ 493.017399] ? get_sigframe_size+0x20/0x20
> [ 493.017405] ? vfs_read+0x1f6/0x2d0
> [ 493.017411] ? unroll_tree_refs+0x18a/0x1e0
> [ 493.017424] exit_to_user_mode_loop+0xdb/0x100
> [ 493.017430] exit_to_user_mode_prepare+0x7e/0x90
> [ 493.017438] syscall_exit_to_user_mode+0x12/0x40
> [ 493.017445] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>
> cat /proc/2937/stack
> [<0>] dm_wait_for_bios_completion+0x298/0x340 [dm_mod]
> [<0>] dm_wait_for_completion+0xfe/0x110 [dm_mod]
> [<0>] __dm_suspend+0xd0/0x310 [dm_mod]
> [<0>] dm_suspend+0x133/0x180 [dm_mod]
> [<0>] dev_suspend+0x115/0x150 [dm_mod]
> [<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
> [<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
> [<0>] __se_sys_ioctl+0xeb/0x120
> [<0>] do_syscall_64+0x30/0x40
> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>
> Signed-off-by: wangzhiqiang <wangzhiqiang95@huawei.com>
> ---
> tools/vgchange.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/vgchange.c b/tools/vgchange.c
> index e4b57db..eb3096d 100644
> --- a/tools/vgchange.c
> +++ b/tools/vgchange.c
> @@ -837,7 +837,7 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
> cmd->lockd_vg_enforce_sh = 1;
> }
>
> - if (update)
> + if (update || arg_is_set(cmd, refresh_ARG))
> flags |= READ_FOR_UPDATE;
> else if (arg_is_set(cmd, activate_ARG))
> flags |= READ_FOR_ACTIVATE;
> --
> 2.33.0
>
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://listman.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [linux-lvm] vgchange acquire an exclusive VG lock for refresh
2023-08-29 6:36 ` wangzhiqiang (Q)
@ 2023-08-29 21:41 ` David Teigland
2023-08-30 2:14 ` wangzhiqiang (Q)
1 sibling, 0 replies; 4+ messages in thread
From: David Teigland @ 2023-08-29 21:41 UTC (permalink / raw)
To: LVM general discussion and development; +Cc: lixiaokeng, louhongxiang
On Tue, Aug 29, 2023 at 02:36:53PM +0800, wangzhiqiang (Q) wrote:
> diff --git a/tools/vgchange.c b/tools/vgchange.c
> index f07b245bd..f35ff4c0e 100644
> --- a/tools/vgchange.c
> +++ b/tools/vgchange.c
> @@ -1003,7 +1003,7 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
> init_external_device_info_source(DEV_EXT_NONE);
> }
>
> - if (update)
> + if (update || arg_is_set(cmd, refresh_ARG))
> flags |= READ_FOR_UPDATE;
> else if (arg_is_set(cmd, activate_ARG))
> flags |= READ_FOR_ACTIVATE;
Shouldn't it be:
else if (arg_is_set(cmd, activate_ARG) ||
arg_is_set(cmd, refresh_ARG))
flags |= READ_FOR_ACTIVATE;
READ_FOR_ACTIVATE should translate to an ex lock like READ_FOR_UPDATE.
Note the same fix for lvchange refresh in commit 47bcb446b83f9aa4fca74301fda109a8bf670fbb
Dave
_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://listman.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [linux-lvm] vgchange acquire an exclusive VG lock for refresh
2023-08-29 6:36 ` wangzhiqiang (Q)
2023-08-29 21:41 ` David Teigland
@ 2023-08-30 2:14 ` wangzhiqiang (Q)
1 sibling, 0 replies; 4+ messages in thread
From: wangzhiqiang (Q) @ 2023-08-30 2:14 UTC (permalink / raw)
To: linux-lvm; +Cc: lixiaokeng, louhongxiang
Thank you for your reply.
According to your review, I reworked a proper patch.
---
tools/vgchange.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/vgchange.c b/tools/vgchange.c
index e2d3dad02..8c1d605c6 100644
--- a/tools/vgchange.c
+++ b/tools/vgchange.c
@@ -1008,7 +1008,8 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
if (update)
flags |= READ_FOR_UPDATE;
- else if (arg_is_set(cmd, activate_ARG))
+ else if (arg_is_set(cmd, activate_ARG) ||
+ arg_is_set(cmd, refresh_ARG))
flags |= READ_FOR_ACTIVATE;
if (!(handle = init_processing_handle(cmd, NULL))) {
--
2.33.0
在 2023/8/29 14:36, wangzhiqiang (Q) 写道:
> Patches based on the latest version:
>
> ---
> tools/vgchange.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/tools/vgchange.c b/tools/vgchange.c
> index f07b245bd..f35ff4c0e 100644
> --- a/tools/vgchange.c
> +++ b/tools/vgchange.c
> @@ -1003,7 +1003,7 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
> init_external_device_info_source(DEV_EXT_NONE);
> }
>
> - if (update)
> + if (update || arg_is_set(cmd, refresh_ARG))
> flags |= READ_FOR_UPDATE;
> else if (arg_is_set(cmd, activate_ARG))
> flags |= READ_FOR_ACTIVATE;
> --
> 2.33.0
>
> 在 2023/8/29 11:53, wangzhiqiang (Q) 写道:
>> I've got an issue while execute vgchange --refresh concurrently, process vgchange and systemd-udevd
>> enters the D state.
>> root 2933 0.0 1.0 54216 31344 pts/1 D<L 11:21 0:00 vgchange --refresh
>> root 2934 0.0 1.1 54216 32788 pts/1 D<L 11:21 0:00 vgchange --refresh
>> root 2935 0.0 1.0 54216 31496 pts/1 D<L 11:21 0:00 vgchange --refresh
>> root 2937 0.0 1.0 54216 31500 pts/1 S<L 11:21 0:00 vgchange --refresh
>> root 2951 0.0 0.0 0 0 ? D 11:21 0:00 [systemd-udevd]
>> root 2952 0.0 0.0 0 0 ? D 11:21 0:00 [systemd-udevd]
>>
>> process stack as follows
>> [root@localhost ~]# cat /proc/2937/stack
>> [<0>] dm_wait_for_bios_completion+0x298/0x340 [dm_mod]
>> [<0>] dm_wait_for_completion+0xfe/0x110 [dm_mod]
>> [<0>] __dm_suspend+0xd0/0x310 [dm_mod]
>> [<0>] dm_suspend+0x133/0x180 [dm_mod]
>> [<0>] dev_suspend+0x115/0x150 [dm_mod]
>> [<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
>> [<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
>> [<0>] __se_sys_ioctl+0xeb/0x120
>> [<0>] do_syscall_64+0x30/0x40
>> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>> [root@localhost ~]# cat /proc/2935/stack
>> [<0>] dm_suspend+0x2b/0x180 [dm_mod]
>> [<0>] dev_suspend+0x115/0x150 [dm_mod]
>> [<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
>> [<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
>> [<0>] __se_sys_ioctl+0xeb/0x120
>> [<0>] do_syscall_64+0x30/0x40
>> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>> [root@localhost ~]# cat /proc/2951/stack
>> [<0>] __lock_page+0x25a/0x7a0
>> [<0>] truncate_inode_pages_range+0xc52/0x1370
>> [<0>] __blkdev_put+0x15b/0x3f0
>> [<0>] blkdev_close+0x49/0x60
>> [<0>] __fput+0x1b9/0x480
>> [<0>] task_work_run+0xad/0xf0
>> [<0>] do_exit+0x47f/0x810
>> [<0>] do_group_exit+0x77/0x150
>> [<0>] get_signal+0x2a2/0xa60
>> [<0>] arch_do_signal_or_restart+0x1c6/0x310
>> [<0>] exit_to_user_mode_loop+0xdb/0x100
>> [<0>] exit_to_user_mode_prepare+0x7e/0x90
>> [<0>] syscall_exit_to_user_mode+0x12/0x40
>> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>>
>> I recommend get an exclusive lock when vgchange --refresh.
>>
>> >From 7ddadf2bbbe0383893ab8f5b7cb8d51ebf7a5ed4 Mon Sep 17 00:00:00 2001
>> From: wangzhiqiang <wangzhiqiang95@huawei.com>
>> Date: Tue, 29 Aug 2023 10:28:15 +0800
>> Subject: [PATCH] vgchange acquire an exclusive VG lock for refresh.
>>
>> Let's run the following test cases, we've got hungtask.
>> P2 or P3 can't suspend snap and udevd also can't read
>> device info because real or cow has been suspend.
>>
>> P1(vgchange) P2(vgchange) P3(vgchange)
>> --------------------------------------------------------
>> suspend real
>> suspend cow
>> suspend snap
>> suspend snap
>> suspend snap
>>
>> function query()
>> {
>> while true
>> do
>> vgchange --refresh
>> done
>> }
>>
>> query 1 &> /dev/null &
>> query 2 &> /dev/null &
>> query 3 &> /dev/null &
>>
>> [ 247.250669] INFO: task vgchange:2934 blocked for more than 122 seconds.
>> [ 247.251935] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> [ 247.252619] task:vgchange state:D stack: 0 pid: 2934 ppid: 2930 flags:0x00000080
>> [ 247.252626] Call Trace:
>> [ 247.252633] __schedule+0x547/0xe80
>> [ 247.252640] ? io_schedule_timeout+0xb0/0xb0
>> [ 247.252647] ? _raw_spin_lock+0x7a/0xd0
>> [ 247.252652] schedule+0x6f/0x130
>> [ 247.252658] schedule_preempt_disabled+0xa/0x10
>> [ 247.252664] __mutex_lock.constprop.0+0x311/0x700
>> [ 247.252673] ? kernel_text_address.part.0+0xb9/0xc0
>> [ 247.252678] ? ww_mutex_unlock+0x50/0x50
>> [ 247.252685] ? unwind_get_return_address+0x33/0x50
>> [ 247.252692] ? cred_has_capability.isra.0+0x14b/0x220
>> [ 247.252698] ? check_nnp_nosuid.isra.0+0x170/0x170
>> [ 247.252704] mutex_lock+0x114/0x130
>> [ 247.252710] ? __mutex_lock_slowpath+0x10/0x10
>> [ 247.252716] ? rwsem_down_write_slowpath+0x830/0x830
>> [ 247.252733] ? dm_get+0x40/0x70 [dm_mod]
>> [ 247.252752] ? dm_get_md+0xb3/0x120 [dm_mod]
>> [ 247.252770] dm_suspend+0x2b/0x180 [dm_mod]
>> [ 247.252788] dev_suspend+0x115/0x150 [dm_mod]
>> [ 247.252805] ctl_ioctl+0x320/0x4c0 [dm_mod]
>> [ 247.252823] ? dev_set_geometry+0x290/0x290 [dm_mod]
>> [ 247.252841] ? copy_params+0x2e0/0x2e0 [dm_mod]
>> [ 247.252846] ? locks_dispose_list+0xa0/0xd0
>> [ 247.252851] ? locks_remove_posix+0x24f/0x340
>> [ 247.252856] ? locks_remove_flock+0x1e6/0x250
>> [ 247.252865] ? ioctl_fiemap.isra.0+0x110/0x1e0
>> [ 247.252872] ? vfs_write+0x2a5/0x440
>> [ 247.252877] ? selinux_file_ioctl+0x89/0x1c0
>> [ 247.252895] ? ctl_ioctl+0x4c0/0x4c0 [dm_mod]
>> [ 247.252912] dm_ctl_ioctl+0x26/0x40 [dm_mod]
>> [ 247.252918] __se_sys_ioctl+0xeb/0x120
>> [ 247.252923] do_syscall_64+0x30/0x40
>> [ 247.252929] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>>
>> [ 247.252967] INFO: task vgchange:2935 blocked for more than 122 seconds.
>> [ 247.254242] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> [ 247.254909] task:vgchange state:D stack: 0 pid: 2935 ppid: 2931 flags:0x00000080
>> [ 247.254922] Call Trace:
>> [ 247.254929] __schedule+0x547/0xe80
>> [ 247.254935] ? io_schedule_timeout+0xb0/0xb0
>> [ 247.254942] ? _raw_spin_lock+0x7a/0xd0
>> [ 247.254947] schedule+0x6f/0x130
>> [ 247.254953] schedule_preempt_disabled+0xa/0x10
>> [ 247.254959] __mutex_lock.constprop.0+0x311/0x700
>> [ 247.254965] ? kernel_text_address.part.0+0xb9/0xc0
>> [ 247.254976] ? ww_mutex_unlock+0x50/0x50
>> [ 247.254981] ? unwind_get_return_address+0x33/0x50
>> [ 247.254988] ? cred_has_capability.isra.0+0x14b/0x220
>> [ 247.254995] ? check_nnp_nosuid.isra.0+0x170/0x170
>> [ 247.255000] mutex_lock+0x114/0x130
>> [ 247.255006] ? __mutex_lock_slowpath+0x10/0x10
>> [ 247.255012] ? rwsem_down_write_slowpath+0x830/0x830
>> [ 247.255029] ? dm_get+0x40/0x70 [dm_mod]
>> [ 247.255052] ? dm_get_md+0xb3/0x120 [dm_mod]
>> [ 247.255069] dm_suspend+0x2b/0x180 [dm_mod]
>> [ 247.255088] dev_suspend+0x115/0x150 [dm_mod]
>> [ 247.255113] ctl_ioctl+0x320/0x4c0 [dm_mod]
>> [ 247.255142] ? dev_set_geometry+0x290/0x290 [dm_mod]
>> [ 247.255160] ? copy_params+0x2e0/0x2e0 [dm_mod]
>> [ 247.255175] ? nohz_balance_exit_idle+0x2b/0x160
>> [ 247.255187] ? rb_insert_color+0x2a/0x280
>> [ 247.255196] ? ioctl_fiemap.isra.0+0x110/0x1e0
>> [ 247.255202] ? selinux_file_ioctl+0x89/0x1c0
>> [ 247.255219] ? ctl_ioctl+0x4c0/0x4c0 [dm_mod]
>> [ 247.255238] dm_ctl_ioctl+0x26/0x40 [dm_mod]
>> [ 247.255250] __se_sys_ioctl+0xeb/0x120
>> [ 247.255255] do_syscall_64+0x30/0x40
>> [ 247.255262] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>>
>> [ 493.015195] INFO: task systemd-udevd:2951 blocked for more than 122 seconds.
>> [ 493.016461] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> [ 493.017131] task:systemd-udevd state:D stack: 0 pid: 2951 ppid: 719 flags:0x000043a6
>> [ 493.017138] Call Trace:
>> [ 493.017145] __schedule+0x547/0xe80
>> [ 493.017152] ? io_schedule_timeout+0xb0/0xb0
>> [ 493.017157] ? orc_find.part.0+0x240/0x240
>> [ 493.017163] ? get_stack_info_noinstr+0x16/0x140
>> [ 493.017171] ? bpf_ksym_find+0xc0/0x110
>> [ 493.017189] schedule+0x6f/0x130
>> [ 493.017195] io_schedule+0x6d/0xa0
>> [ 493.017202] __lock_page+0x25a/0x7a0
>> [ 493.017209] ? wait_on_page_bit_killable+0x6c0/0x6c0
>> [ 493.017216] ? __lock_page_or_retry+0x3e0/0x3e0
>> [ 493.017222] ? add_to_page_cache_lru+0x370/0x370
>> [ 493.017231] truncate_inode_pages_range+0xc52/0x1370
>> [ 493.017242] ? generic_error_remove_page+0x90/0x90
>> [ 493.017248] ? __filemap_fdatawait_range+0x179/0x270
>> [ 493.017256] ? filemap_range_has_page+0x170/0x170
>> [ 493.017264] ? __bitmap_or_equal+0x89/0x120
>> [ 493.017271] ? _find_next_bit.constprop.0+0xde/0x120
>> [ 493.017279] ? cpumask_next+0x2c/0x40
>> [ 493.017287] ? smp_call_function_many_cond+0x430/0x5f0
>> [ 493.017295] ? touch_buffer+0xa0/0xa0
>> [ 493.017305] ? __find_get_block+0x110/0x110
>> [ 493.017311] ? __find_get_block+0x110/0x110
>> [ 493.017316] ? touch_buffer+0xa0/0xa0
>> [ 493.017322] __blkdev_put+0x15b/0x3f0
>> [ 493.017328] ? blkdev_put+0x1c0/0x1c0
>> [ 493.017333] blkdev_close+0x49/0x60
>> [ 493.017339] __fput+0x1b9/0x480
>> [ 493.017346] task_work_run+0xad/0xf0
>> [ 493.017354] do_exit+0x47f/0x810
>> [ 493.017361] ? exit_mm+0x450/0x450
>> [ 493.017371] ? _raw_spin_lock_irq+0x7b/0xd0
>> [ 493.017377] do_group_exit+0x77/0x150
>> [ 493.017384] get_signal+0x2a2/0xa60
>> [ 493.017393] arch_do_signal_or_restart+0x1c6/0x310
>> [ 493.017399] ? get_sigframe_size+0x20/0x20
>> [ 493.017405] ? vfs_read+0x1f6/0x2d0
>> [ 493.017411] ? unroll_tree_refs+0x18a/0x1e0
>> [ 493.017424] exit_to_user_mode_loop+0xdb/0x100
>> [ 493.017430] exit_to_user_mode_prepare+0x7e/0x90
>> [ 493.017438] syscall_exit_to_user_mode+0x12/0x40
>> [ 493.017445] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>>
>> cat /proc/2937/stack
>> [<0>] dm_wait_for_bios_completion+0x298/0x340 [dm_mod]
>> [<0>] dm_wait_for_completion+0xfe/0x110 [dm_mod]
>> [<0>] __dm_suspend+0xd0/0x310 [dm_mod]
>> [<0>] dm_suspend+0x133/0x180 [dm_mod]
>> [<0>] dev_suspend+0x115/0x150 [dm_mod]
>> [<0>] ctl_ioctl+0x320/0x4c0 [dm_mod]
>> [<0>] dm_ctl_ioctl+0x26/0x40 [dm_mod]
>> [<0>] __se_sys_ioctl+0xeb/0x120
>> [<0>] do_syscall_64+0x30/0x40
>> [<0>] entry_SYSCALL_64_after_hwframe+0x61/0xc6
>>
>> Signed-off-by: wangzhiqiang <wangzhiqiang95@huawei.com>
>> ---
>> tools/vgchange.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/tools/vgchange.c b/tools/vgchange.c
>> index e4b57db..eb3096d 100644
>> --- a/tools/vgchange.c
>> +++ b/tools/vgchange.c
>> @@ -837,7 +837,7 @@ int vgchange(struct cmd_context *cmd, int argc, char **argv)
>> cmd->lockd_vg_enforce_sh = 1;
>> }
>>
>> - if (update)
>> + if (update || arg_is_set(cmd, refresh_ARG))
>> flags |= READ_FOR_UPDATE;
>> else if (arg_is_set(cmd, activate_ARG))
>> flags |= READ_FOR_ACTIVATE;
>> --
>> 2.33.0
>>
_______________________________________________
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read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2023-08-30 2:14 UTC | newest]
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2023-08-29 3:53 [linux-lvm] vgchange acquire an exclusive VG lock for refresh wangzhiqiang (Q)
2023-08-29 6:36 ` wangzhiqiang (Q)
2023-08-29 21:41 ` David Teigland
2023-08-30 2:14 ` wangzhiqiang (Q)
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