[LU-11892] Memory leak in MDT Coordinator

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0
• Affects Version/s: Lustre 2.12.0, Lustre 2.10.6
• Labels: hsm
• Severity: 3
• Assignee: Aurelien Degremont (Inactive)
• Reporter: Aurelien Degremont (Inactive)

Description

After creating a big HSM request candidate list, coordinator thread
allocates an update list which is 16 bytes times the number of
candidates files. In some cases, they could be more than 300,000
candidate files and so several MB will be needed.

Memory allocation failure was skipping candidate list freeing which led to memory leak.

 

This problem was detected under Lustre 2.10.5. Since, a patch landed that makes this bug  more difficult to trigger, but the code is still present.

I will submit a fix for it.

Comments

[Peter Jones]

Landed for 2.13

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/34123/
Subject: LU-11892 hsm: fix memory leak when scheduling HSM requests
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: fc13209d2a15f68c4b96288b3a68d45826abc64d

[Gerrit Updater]

Aurelien Degremont ([e-mail]) uploaded a new patch: https://review.whamcloud.com/34123
Subject: LU-11892 hsm: fix memory leak when scheduling HSM requests
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: d01e04c00b080799001e10b577be2fb15cd0802c