[LU-14397] A race between lock enqueue and idle import

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.15.0
• Affects Version/s: Lustre 2.14.0
• Labels: patch
• Severity: 3
• Assignee: Alexander Boyko
• Reporter: Alexander Boyko

Description

There is a window after ptlrpc_check_import_is_idle() and setting LUSTRE_IMP_CONNECTING for lock enqueue. The lock get granted on OST and is returned to the client. Server's lock is destroyed on OST_DISCONNECT.

Issue Links

• is related to: LU-17846 sanity test_812c: mdt_handler.c:196:mdt_lock_handle_assert()) ASSERTION( !lustre_handle_is_used(&lh->mlh_rreg_lh) ) failed

Comments

[Andreas Dilger]

Note that there are occasional timeouts in this test:
https://testing.whamcloud.com/sub_tests/ff3d1a25-4d12-4cfc-8f7a-889d8fa977d0
https://testing.whamcloud.com/sub_tests/978a26a1-fcbc-4be2-825f-e93308d14c4d
https://testing.whamcloud.com/sub_tests/4a377d5b-3ae3-4cb5-bdbe-f2d2fdbb8d80
https://testing.whamcloud.com/sub_tests/725c2047-a3d6-48ad-aada-3722d7141468
https://testing.whamcloud.com/sub_tests/8f627fa7-20c4-43d0-91d8-b3cd73dbe40f
https://testing.whamcloud.com/sub_tests/f64bb7c7-d3e9-40a7-89d7-a6f343e7a07b

[Peter Jones]

Landed for 2.15

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/41403/
Subject: LU-14397 ptlrpc: idle import vs lock enqueue race
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: e6af3c529021976e6df5b5e729d6a6197d27fe11

[Gerrit Updater]

Alexander Boyko ([e-mail]) uploaded a new patch: https://review.whamcloud.com/41403
Subject: LU-14397 ptlrpc: idle import vs lock enqueue race
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: d847d29ee5391a32e328b1d496ff9dbb9b68d94c