Page MenuHomeFreeBSD
Differential D44174

kern/openzfs: Regulate the ZFS ARC pruning process precisely. (stable/14)
Needs ReviewPublic
Actions

Authored by seigo.tanimura_gmail.com on Mar 1 2024, 5:32 PM.
Tags
None
Referenced Files
Unknown Object (File)
Sun, May 31, 11:49 AM
Unknown Object (File)
Sun, May 31, 11:49 AM
Unknown Object (File)
Apr 27 2026, 4:30 PM
Unknown Object (File)
Apr 26 2026, 11:13 PM
Unknown Object (File)
Apr 24 2026, 2:50 PM
Unknown Object (File)
Apr 23 2026, 4:40 AM
Unknown Object (File)
Apr 22 2026, 5:52 PM
Unknown Object (File)
Apr 21 2026, 11:03 AM
View All Files
Subscribers
delphij
imp
olce
zirias

Details

Reviewers
olce
Summary

This fix essentially eliminates the high CPU usage caused by the ARC pruning
thread, acknowledged by FreeBSD-EN-23:18.openzfs.

  • Key Features
  • Accounting of the ZFS vnodes in use. (v_usecount > 0)
  • Recycling of the ZFS vnodes with the precise target.
  • Acceleration of the ZFS vnode recycling by the ARC eviction waiters.

PR: 275594
Security: FreeBSD-EN-23:18.openzfs
Signed-off-by: Seigo Tanimura <seigo.tanimura@gmail.com>

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Skipped
Unit
Tests Skipped
Build Status
Buildable 56978
Build 53866: arc lint + arc unit

Event Timeline

seigo.tanimura_gmail.com created this revision.Mar 1 2024, 5:32 PM
Herald added subscribers: olce, delphij, imp. · View Herald TranscriptMar 1 2024, 5:32 PM
seigo.tanimura_gmail.com requested review of this revision.Mar 1 2024, 5:32 PM
Harbormaster completed remote builds in B56373: Diff 135275.Mar 1 2024, 5:32 PM
seigo.tanimura_gmail.com added a comment.Mar 1 2024, 5:34 PM

Target branches: stable/14, releng/14.0
Backport of: https://reviews.freebsd.org/D44173

seigo.tanimura_gmail.com added a parent revision: D44171: kern/vfs: Add the per-filesystem vnode counter to struct mount..Mar 1 2024, 5:34 PM
seigo.tanimura_gmail.com retitled this revision from kern/openzfs: Regulate the ZFS ARC pruning process precisely. to kern/openzfs: Regulate the ZFS ARC pruning process precisely. (stable/14).Mar 1 2024, 5:52 PM
seigo.tanimura_gmail.com added a child revision: D44177: kern/nullfs: Implement the recycling on the nullfs nodes..Mar 1 2024, 6:48 PM
seigo.tanimura_gmail.com added a child revision: D44217: kern/nullfs: Add the sysctl to control the vnode caching upon mounting nullfs..Mar 5 2024, 6:35 AM
seigo.tanimura_gmail.com removed a child revision: D44217: kern/nullfs: Add the sysctl to control the vnode caching upon mounting nullfs..
zirias added a subscriber: zirias.Mar 22 2024, 1:34 PM
seigo.tanimura_gmail.com updated this revision to Diff 136761.Apr 9 2024, 9:52 AM

Follow style(9).

Harbormaster completed remote builds in B56978: Diff 136761.Apr 9 2024, 9:52 AM
olce added a reviewer: olce.Apr 11 2024, 9:54 PM

Revision Contents
Changeset List

PathSize
sys/
contrib/
openzfs/
include/
os/
freebsd/
zfs/
sys/
6 lines
sys/
1 line
module/
os/
freebsd/
zfs/
42 lines
70 lines
5 lines
143 lines
2 lines
9 lines
zfs/
12 lines
kern/
193 lines

Diff 136761

View Options

sys/contrib/openzfs/include/os/freebsd/zfs/sys/zfs_vfsops_os.h

Loading...
View Options

sys/contrib/openzfs/include/sys/arc.h

Loading...
View Options

sys/contrib/openzfs/module/os/freebsd/zfs/arc_os.c

Loading...
View Options

sys/contrib/openzfs/module/os/freebsd/zfs/sysctl_os.c

Loading...
View Options

sys/contrib/openzfs/module/os/freebsd/zfs/zfs_ctldir.c

Loading...
View Options

sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vfsops.c

Loading...
View Options

sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c

Loading...
View Options

sys/contrib/openzfs/module/os/freebsd/zfs/zfs_znode.c

Loading...
View Options

sys/contrib/openzfs/module/zfs/arc.c

Loading...
View Options

sys/kern/vfs_subr.c

Loading...