[LU-14305] add persistent tuning for mb_c3_threshold

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.15.0
• Labels: ldiskfs
• Assignee: Andreas Dilger
• Reporter: Andreas Dilger

Description

Allow the ldiskfs mb_c[123]_threshold parameters to be set persistently. Currently, they are only in /sys/fs/ldiskfs/<dev>/mb_c[123]_threshold and are not configurable via "lctl set_param", sysctl, or other (known to me) tuning mechanism.

While the upstream ext4 developers seem to frown upon mount options, this does provide a mechanism (via /etc/fstab and/or tune2fs -E mount_opts=<opts>) for setting filesystems parameters permanently on a per-filesystem basis.

Issue Links

• is related to: LU-12103 Improve block allocation for large partitions
• is related to: LU-14438 backport ldiskfs mballoc patches

Comments

[Gerrit Updater]

"Etienne AUJAMES <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/52744
Subject: LU-14305 ldiskfs: add parameters for mb_c123_threshold
Project: fs/lustre-release
Branch: b2_12
Current Patch Set: 1
Commit: cbb6baaf60d7cb6022933f609f93e8806048a054

[Peter Jones]

Landed for 2.15

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/41193/
Subject: LU-14305 ldiskfs: add parameters for mb_c123_threshold
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: c2fd5297b46c4973aeda4d4d02cbc7ca2faa0d50

[Gerrit Updater]

Andreas Dilger ([e-mail]) uploaded a new patch: https://review.whamcloud.com/41193
Subject: LU-14305 ldiskfs: add parameters for mb_c123_threshold
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 5060639ebf5d3d691192dbad10a5584554e46f5e