[LU-18536] statahead: decrease the inuse entry count when entry state waiting timeout

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.17.0
• Affects Version/s: Lustre 2.17.0
• Labels: mtg_7
• Severity: 3
• Assignee: Qian Yingjin
• Reporter: Qian Yingjin

Description

[ 1971.751519] systemd[1]: mnt-lustre.mount: Succeeded.
[ 1994.470244] Lustre: lustre-MDT0000: haven't heard from client b1480839-909d-4d3c-a88e-ac243d683b7a (at 0@lo) in 33 seconds. I think it's dead, and I am evicting it. exp ffff9987114b0000, cur 1733932014 expire 1733931984 last 1733931981
[ 1996.471000] Lustre: lustre-MDT0001: haven't heard from client b1480839-909d-4d3c-a88e-ac243d683b7a (at 0@lo) in 35 seconds. I think it's dead, and I am evicting it. exp ffff99866e14b000, cur 1733932016 expire 1733931986 last 1733931981
[ 1996.474826] Lustre: Skipped 4 previous similar messages
[ 2109.110074] Lustre: 103888:0:(statahead.c:1649:ll_statahead_thread()) lustre: statahead thread waited 1024ms for inuse entry [0x200000402:0x458:0x0] to be finished
[ 2263.020079] Lustre: 103888:0:(statahead.c:1649:ll_statahead_thread()) lustre: statahead thread waited 1152ms for inuse entry [0x200000402:0x458:0x0] to be finished
[ 2417.010074] Lustre: 103888:0:(statahead.c:1649:ll_statahead_thread()) lustre: statahead thread waited 1280ms for inuse entry [0x200000402:0x458:0x0] to be finished
[ 2724.520064] Lustre: 103888:0:(statahead.c:1649:ll_statahead_thread()) lustre: statahead thread waited 1536ms for inuse entry [0x200000402:0x458:0x0] to be finished
[ 2724.520348] Lustre: 103888:0:(statahead.c:1649:ll_statahead_thread()) Skipped 1 previous similar message
[ 3340.070174] Lustre: 103888:0:(statahead.c:1649:ll_statahead_thread()) lustre: statahead thread waited 2048ms for inuse entry [0x200000402:0x458:0x0] to be finished
[ 3340.112119] Lustre: 103888:0:(statahead.c:1649:ll_statahead_thread()) Skipped 3 previous similar messages

the traces:

PID: 103888   TASK: ffff998684d94e40  CPU: 0    COMMAND: "ll_sa_18552"
 #0 [ffff99866ff87d20] __schedule at ffffffff8c6f6bd6
    /tmp/kernel/kernel/sched/core.c: 3755
 #1 [ffff99866ff87d78] schedule at ffffffff8c6f7170
    /tmp/kernel/kernel/sched/core.c: 4602
 #2 [ffff99866ff87d90] schedule_timeout at ffffffff8c6fd475
    /tmp/kernel/kernel/time/timer.c: 1860
 #3 [ffff99866ff87e48] msleep at ffffffff8c1624a2
    /tmp/kernel/kernel/time/timer.c: 2011
 #4 [ffff99866ff87e58] ll_statahead_thread at ffffffffc173a7a1 [lustre]
    /home/lustre/master-mine/lustre/llite/statahead.c: 1646
 #5 [ffff99866ff87f10] kthread at ffffffff8c10383e
    /tmp/kernel/kernel/kthread.c: 354
 #6 [ffff99866ff87f50] ret_from_fork at ffffffff8c8001c4
    /tmp/kernel/arch/x86/entry/entry_64.S: 328

PID: 177657   TASK: ffff99867b05c880  CPU: 1    COMMAND: "umount"
 #0 [ffff99868398fd68] __schedule at ffffffff8c6f6bd6
    /tmp/kernel/kernel/sched/core.c: 3755
 #1 [ffff99868398fdc0] schedule at ffffffff8c6f7170
    /tmp/kernel/kernel/sched/core.c: 4602
 #2 [ffff99868398fdd8] schedule_timeout at ffffffff8c6fd475
    /tmp/kernel/kernel/time/timer.c: 1860
 #3 [ffff99868398fe90] ll_kill_super at ffffffffc16f9e96 [lustre]
    /home/lustre/linux-4.18.0-477.15.1.el8_8/include/linux/compiler.h: 278
 #4 [ffff99868398fea8] lustre_kill_super at ffffffffc1733063 [lustre]
    /home/lustre/master-mine/lustre/llite/super25.c: 212
 #5 [ffff99868398feb8] deactivate_locked_super at ffffffff8c260e64
    /tmp/kernel/fs/super.c: 340
 #6 [ffff99868398fed0] cleanup_mnt at ffffffff8c282f46
    /tmp/kernel/fs/namespace.c: 115
 #7 [ffff99868398fee0] task_work_run at ffffffff8c10142a
    /tmp/kernel/kernel/task_work.c: 127
 #8 [ffff99868398ff20] exit_to_usermode_loop at ffffffff8c002355
    /tmp/kernel/./include/linux/tracehook.h: 188
 #9 [ffff99868398ff38] do_syscall_64 at ffffffff8c002b0e
    /tmp/kernel/arch/x86/entry/common.c: 200
#10 [ffff99868398ff50] entry_SYSCALL_64_after_hwframe at ffffffff8c80007d
    /tmp/kernel/arch/x86/entry/entry_64.S: 147

Issue Links

• is related to: LU-18523 tests sanity/test_65j: wait for ll_sa stat-ahead thread to quit during cleanup
• is related to: LU-14361 Add support for statahead pattern with regularized file name

Comments

[Peter Jones]

Merged for 2.17

[Gerrit Updater]

"Oleg Drokin <[e-mail]>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/57382/
Subject: LU-18536 statahead: dec inuse count when waiting entry timeout
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 6703c05df0e60c5af46f59c4ff19d17a7d0a88fb

[Gerrit Updater]

"Qian Yingjin <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/57382
Subject: LU-18536 statahead: dec inuse count when waiting entry timeout
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 7abcb68a0ee4ea73b17f83cd00f737f25d20e5b8