[LU-12782] Convert cl_object_attr_lock to rwlock

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Assignee: Dongyang Li
• Reporter: Patrick Farrell (Inactive)

Description

Under some shared file workloads, the cl_object_attr_lock ends up 'hot'.  As suggested in an old comment, it can easily be converted to an rwlock, which is useful because it is often taken for read.

Comments

[Gerrit Updater]

"Patrick Farrell <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/51350
Subject: LU-12782 osc: Do not touch object attrs for every page
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: afd5c1d8db40386a18719d2712ee9ab498a039a8

[Gerrit Updater]

"Patrick Farrell <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/51347
Subject: LU-12782 llite: rationalize cl_object_attr locking
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 77e40614005615d0477a3ebbc59904bc7d20af54

[Patrick Farrell (Inactive)]

This is a recent addition to the io500 branch, which is expected to help performance a bit on hard write and hard read (particularly hard read).

[Gerrit Updater]

Patrick Farrell ([e-mail]) uploaded a new patch: https://review.whamcloud.com/36229
Subject: LU-12782 llite: Convert attr lock to rwlock
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 74615ac8e41c82096d6e726ef3dc50a196fb3670