[LU-8928] osd-zfs should use dnode_t instead of dbuf

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.10.0
• Assignee: Alex Zhuravlev
• Reporter: Alex Zhuravlev

Description

osd-zfs should use dnode_t instead of dbuf, this will let to use methods like zap_add_by_dnode() and improve metadata performance significantly as they don't need to lookup dnode_t by dnode#.

Issue Links

• is blocking: LU-7895 zfs metadata performance improvements
• is related to: LU-8927 osp-syn processes contending for osq_lock drives system cpu usage > 80%

Comments

[Peter Jones]

Landed for 2.10

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch https://review.whamcloud.com/24293/
Subject: LU-8928 osd: convert osd-zfs to reference dnode, not db
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: fcd92d64393e0f43f322887fa3d35024c55285e6

[Gerrit Updater]

Alex Zhuravlev ([e-mail]) uploaded a new patch: https://review.whamcloud.com/24293
Subject: LU-8928 osd: convert osd-zfs to reference dnode, not db
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 5867c5ff677c75f3916f95c4d860c0840d21124f