8136b9d73b
Since 8c4fb36a24 (PR #7795) spa_has_pending_synctask() started to take two more locks per write inside txg_all_lists_empty(). I am surprised those pool-wide locks are not contended, but still their operations are visible in CPU profiles under contended vdev lock. This commit slightly changes vdev_queue_max_async_writes() flow to not call the function if we are going to return max_active any way due to high amount of dirty data. It allows to save some CPU time exactly when the pool is busy. Reviewed-by: Ryan Moeller <ryan@iXsystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-By: Tom Caputi <caputit1@tcnj.edu> Signed-off-by: Alexander Motin <mav@FreeBSD.org> Closes #11280
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 12-STABLE and 13-CURRENT.