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Differential D44175

kern/openzfs: Regulate the ZFS ARC pruning process precisely. (stable/13)
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Authored by seigo.tanimura_gmail.com on Mar 1 2024, 5:36 PM.
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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
Reported By: Thomas Mueller <thmu7@freenet.de>
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 56374
Build 53262: arc lint + arc unit

Event Timeline

seigo.tanimura_gmail.com created this revision.Mar 1 2024, 5:36 PM
Herald added subscribers: olce, delphij, imp. · View Herald TranscriptMar 1 2024, 5:36 PM
seigo.tanimura_gmail.com requested review of this revision.Mar 1 2024, 5:36 PM
Harbormaster completed remote builds in B56374: Diff 135276.Mar 1 2024, 5:36 PM
seigo.tanimura_gmail.com added a comment.Mar 1 2024, 5:37 PM

Target branches: stable/13, releng/13.3
Backport of: https://reviews.freebsd.org/D44173

seigo.tanimura_gmail.com added a parent revision: D44172: kern/vfs: Add the per-filesystem vnode counter to struct mount. (stable/13).Mar 1 2024, 5:37 PM
seigo.tanimura_gmail.com added a child revision: D44178: kern/nullfs: Implement the recycling on the nullfs nodes. (stable/13).Mar 1 2024, 5:44 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/13).Mar 1 2024, 5:58 PM
zirias added a subscriber: zirias.Mar 22 2024, 1:35 PM
seigo.tanimura_gmail.com updated this revision to Diff 136762.Apr 9 2024, 9:56 AM

Follow style(9).

Harbormaster completed remote builds in B56979: Diff 136762.Apr 9 2024, 9:56 AM
olce added a reviewer: olce.Apr 11 2024, 9:54 PM
emaste added a subscriber: emaste.May 6 2024, 4:59 PM

Revision Contents
Changeset List

PathSize
sys/
contrib/
openzfs/
include/
os/
freebsd/
zfs/
sys/
6 lines
sys/
1 line
module/
os/
freebsd/
zfs/
144 lines
70 lines
5 lines
44 lines
2 lines
9 lines
zfs/
12 lines
kern/
190 lines

Diff 135276

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

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

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

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

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

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

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

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

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

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sys/kern/vfs_subr.c

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