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Alexander Motin 8136b9d73b
Avoid some spa_has_pending_synctask() calls. 
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
2020-12-06 09:55:02 -08:00
.github Enable ABI checks for the checkstyle workflow 2020-12-06 09:50:47 -08:00
cmd zpool: Dryrun fails to list some devices 2020-12-04 14:04:39 -08:00
config Add compatibility for busybox mktemp 2020-12-03 10:01:16 -08:00
contrib dracut: use /bin/sh instead of bash as the intepreter 2020-11-28 11:02:08 -08:00
etc Verify zfs module loaded before starting services 2020-11-28 11:11:18 -08:00
include Reduce latency effects of non-interactive I/O 2020-11-24 09:26:42 -08:00
lib zpool: Dryrun fails to list some devices 2020-12-04 14:04:39 -08:00
man Add -u option to 'zfs create' 2020-12-04 14:01:42 -08:00
module Avoid some spa_has_pending_synctask() calls. 2020-12-06 09:55:02 -08:00
rpm zpool_influxdb: move to libexec dir 2020-11-28 11:15:57 -08:00
scripts Add compatibility for busybox mktemp 2020-12-03 10:01:16 -08:00
tests ZTS: adjust zpool_import_012_pos timeout 2020-12-06 09:48:36 -08:00
udev Centralize variable substitution 2020-07-14 17:33:44 -07:00
.editorconfig Add an .editorconfig; document git whitespace settings 2020-01-27 13:32:52 -08:00
.gitignore Add FreeBSD support to OpenZFS 2020-04-14 11:36:28 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Add zstd support to zfs 2020-08-20 10:30:06 -07:00
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
CODE_OF_CONDUCT.md Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
configure.ac Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
copy-builtin Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
COPYRIGHT Fix typos 2020-06-09 21:24:09 -07:00
cppcheck-suppressions.txt Import ZStandard v1.4.5 2020-08-20 10:30:06 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am dracut: use /bin/sh instead of bash as the intepreter 2020-11-28 11:02:08 -08:00
META Increase Supported Linux Kernel to 5.9 2020-10-13 09:51:13 -07:00
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 docs: update README's installation link 2020-10-08 09:33:53 -07:00
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

README.md

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.

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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 12-STABLE and 13-CURRENT.