[Bug 275594] High CPU usage by arc_prune; analysis and fix
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Date: Tue, 05 Mar 2024 09:06:34 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275594
--- Comment #70 from Seigo Tanimura <seigo.tanimura@gmail.com> ---
(In reply to Seigo Tanimura from comment #69)
A quick note that the nullfs fix has been updated as per kib's review on
https://reviews.freebsd.org/D44177.
The nullfs fix is now implemented by a sysctl toggle (vfs.nullfs.cache_nodes)
that controls the nullfs vnode caching, which is enabled by default. Set this
to false to disable the nullfs vnode caching so that its lower vnodes can be
recycled smoothly.
* Github Sources
All of the sources are under
https://github.com/altimeter-130ft/freebsd-freebsd-src.
- Branches and Git Commit Hashes
| | Git
Commit Hash
| Fix Branch |
Base Branch | Fix + Counter Branch | Base
============+=========================================================+=================
main | topic-openzfs-arc_prune-regulation-fix |
57ddfad884
| topic-openzfs-arc_prune-regulation-counters |
------------+---------------------------------------------------------+-----------------
stable/14 | stable/14-topic-openzfs-arc_prune-regulation-fix |
20a6f4779a
| stable/14-topic-openzfs-arc_prune-regulation-counters |
------------+---------------------------------------------------------+-----------------
releng/14.0 | releng/14.0-topic-openzfs-arc_prune-regulation-fix |
4edf3b8073
| releng/14.0-topic-openzfs-arc_prune-regulation-counters |
------------+---------------------------------------------------------+-----------------
stable/13 | stable/13-topic-openzfs-arc_prune-regulation-fix |
9d2f548bbe
| stable/13-topic-openzfs-arc_prune-regulation-counters |
------------+---------------------------------------------------------+-----------------
releng/13.3 | releng/13.3-topic-openzfs-arc_prune-regulation-fix |
24eb518714
| releng/13.3-topic-openzfs-arc_prune-regulation-counters |
------------+---------------------------------------------------------+-----------------
releng/13.2 | releng/13.2-topic-openzfs-arc_prune-regulation-fix |
c78c31d2ef
| releng/13.2-topic-openzfs-arc_prune-regulation-counters |
| Git Commit Hash
| | Per-filesystem | |
| FreeBSD-EN-23:18.openzfs | Vnode Counters | ZFS & VFS | Nullfs
Base Branch | Backport | (VFS part) | Fix | Fix
============+==========================+================+============+============
main | N/A | ee039d8ac5 | 79221e0ef1 |
15e81087f5
------------+--------------------------+----------------+------------+------------
stable/14 | N/A | 2e4eb52fd9 | 7b7bf0eeda |
37404c6e9e
------------+--------------------------+----------------+------------+------------
releng/14.0 | N/A | 5de24ff9b4 | de37505406 |
0a2e6025ce
------------+--------------------------+----------------+------------+------------
stable/13 | 5c62c48b7a | d68540aa6e | 17ca0ab252 |
ae550ed68a
------------+--------------------------+----------------+------------+------------
releng/13.3 | 0d279f56c3 | fb47a19236 | 4af563a184 |
767b47b774
------------+--------------------------+----------------+------------+------------
releng/13.2 | b784851090 | 7ef6cf8f72 | 5e979de6ca |
93cefa9124
| Git Commit Hash
| Counters
Base Branch | (Not for merging)
============+===================
main | 4d5ae0f6aa
------------+-------------------
stable/14 | bf4b2e420d
------------+-------------------
releng/14.0 | 9de8754bcf
------------+-------------------
stable/13 | 8b9a9ad167
------------+-------------------
releng/13.3 | d0389390ce
------------+-------------------
releng/13.2 | 5301e244af
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