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b445b25b27
The original ARC paper called for an initial 50/50 MRU/MFU split and this is accounted in various places where arc_p = arc_c >> 1, with further adjustment based on ghost lists size/hit. However, in current code both arc_adapt() and arc_get_data_impl() aggressively grow arc_p until arc_c is reached, causing unneeded pressure on MFU and greatly reducing its scan-resistance until ghost list adjustments kick in. This patch restores the original behavior of initially having arc_p as 1/2 of total ARC, without preventing MRU to use up to 100% total ARC when MFU is empty. Reviewed-by: Alexander Motin <mav@FreeBSD.org> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Gionatan Danti <g.danti@assyoma.it> Closes #14137 Closes #14120 |
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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.
Official Resources
- Documentation - for using and developing this repo
- ZoL Site - Linux release info & links
- Mailing lists
- OpenZFS site - for conference videos and info on other platforms (illumos, OSX, Windows, etc)
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
METAfile contains the officially recognized supported Linux kernel versions. - Supported FreeBSD versions are any supported branches and releases starting from 12.2-RELEASE.