Go to file
Ameer Hamza 2f41b9d865 L2ARC: Implement persistent markers with consistent tail scanning
This commit introduces per-sublist persistent markers that eliminate
redundant tail scanning between L2ARC iterations, providing significant
CPU efficiency improvements. Markers are pre-allocated during device
initialization and properly cleaned up during device removal.

The implementation uses conditional behavior based on device capacity:
small devices (capacity < arc_c) retain original HEAD/TAIL scanning
based on ARC warmup state, while large devices (capacity >= arc_c)
use the persistent marker approach for optimal CPU efficiency.

Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #18093
2026-02-04 10:06:47 -08:00
.github CI: Fix qemu-1-setup failure, remove debug stuff 2026-01-31 12:40:55 -08:00
cmd build: add SPDX license tags to build system files 2026-01-08 15:08:03 -08:00
config Fix build for Linux 6.18 with PowerPC/RISC-V kernels. (#18145) 2026-02-02 14:16:10 -08:00
contrib Added support for multiple homes in pam_zfs_key module (#18084) 2026-02-03 16:09:10 -08:00
etc build: add SPDX license tags to build system files 2026-01-08 15:08:03 -08:00
include L2ARC: Implement persistent markers with consistent tail scanning 2026-02-04 10:06:47 -08:00
lib Zstd: Integrate v1.5.7 into the ZFS build system 2026-01-20 13:41:06 -08:00
man Added support for multiple homes in pam_zfs_key module (#18084) 2026-02-03 16:09:10 -08:00
module L2ARC: Implement persistent markers with consistent tail scanning 2026-02-04 10:06:47 -08:00
rpm build: add SPDX license tags to build system files 2026-01-08 15:08:03 -08:00
scripts Linux 6.19: handle --werror with CONFIG_OBJTOOL_WERROR=y 2026-02-02 10:19:18 -08:00
tests Added support for multiple homes in pam_zfs_key module (#18084) 2026-02-03 16:09:10 -08:00
udev build: add SPDX license tags to build system files 2026-01-08 15:08:03 -08:00
.editorconfig Add an .editorconfig; document git whitespace settings 2020-01-27 13:32:52 -08:00
.gitignore Packaging: Auto-generate changelog during configure (#15528) 2023-11-16 08:58:47 -08:00
.gitmodules .gitmodules: link to openzfs github repository 2021-04-12 09:37:23 -07:00
.mailmap mailmap/AUTHORS: update with recent new contributors 2025-10-22 09:27:54 -07:00
AUTHORS mailmap/AUTHORS: update with recent new contributors 2025-10-22 09:27:54 -07:00
autogen.sh build: add SPDX license tags to build system files 2026-01-08 15:08:03 -08:00
CODE_OF_CONDUCT.md Documentation corrections 2022-12-22 11:34:28 -08:00
configure.ac Linux build: handle CONFIG_OBJTOOL_WERROR=y 2025-06-16 08:12:09 -07:00
copy-builtin copy-builtin: add hooks with sed/>> 2022-05-10 10:17:43 -07:00
COPYRIGHT Fix typos 2020-06-09 21:24:09 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am Zstd: Integrate v1.5.7 into the ZFS build system 2026-01-20 13:41:06 -08:00
META Linux 6.18 compat: META (#18039) 2025-12-10 09:04:24 -08:00
NEWS Fix NEWS file 2020-08-26 21:44:41 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md Fix capitalization typo in README.md 2025-11-03 16:37:58 -08:00
RELEASES.md Update RELEASES.md LTS release to 2.2 2025-01-17 11:04:36 -05:00
TEST Remove CI builder customization from TEST 2020-03-16 10:46:03 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

img

OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.

codecov coverity

Official Resources

Installation

Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.

Contribute & Develop

We have a separate document with contribution guidelines.

We have a Code of Conduct.

Release

OpenZFS is released under a CDDL license. For more details see the NOTICE, LICENSE and COPYRIGHT files; UCRL-CODE-235197

Supported Kernels

  • The META file contains the officially recognized supported Linux kernel versions.
  • Supported FreeBSD versions are any supported branches and releases starting from 13.0-RELEASE.