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Adam D. Moss acfd2d4641
Add DB_RF_NOPREFETCH to dbuf_read()s in dnode.c 
Prefetching of dnodes in dbuf_read() can cause significant mutex 
contention for some workloads and isn't very helpful.  This is  
because we already get 32 dnodes for each block read, and when 
iterating over a directory we prefetch the dnodes in the directory.
Disable this prefetching to prevent the lock contention.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Submitted-by: Adam Moss <c@yotes.com>
Submitted-by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: Adam Moss <c@yotes.com>
Closes #10877 
Closes #10953
2020-09-25 13:49:22 -07:00
.github Update issue templates, commitcheck and Contributing.md 2020-09-23 09:53:26 -07:00
cmd vdev_ashift should only be set once 2020-09-18 12:13:47 -07:00
config config/zfs-build.m4: never define _initramfs in RPM_DEFINE_UTIL 2020-09-12 08:22:07 -07:00
contrib contrib/initramfs: fix shellcheck and checkbashisms errors with shebang 2020-09-22 16:10:09 -07:00
etc Fix another dependency loop 2020-08-28 10:17:14 -07:00
include FreeBSD: Add support for procfs_list 2020-09-23 16:43:51 -07:00
lib zpool command complains about /etc/exports.d 2020-09-25 13:09:40 -07:00
man Update documentation of l2arc_mfuonly 2020-09-21 09:26:24 -07:00
module Add DB_RF_NOPREFETCH to dbuf_read()s in dnode.c 2020-09-25 13:49:22 -07:00
rpm zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
scripts Update issue templates, commitcheck and Contributing.md 2020-09-23 09:53:26 -07:00
tests vdev_ashift should only be set once 2020-09-18 12:13:47 -07:00
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 Add CODE_OF_CONDUCT.md 2019-04-30 10:58:45 -07:00
configure.ac zfs label bootenv should store data as nvlist 2020-09-15 15:42:27 -07:00
copy-builtin Move zfs_gitrev.h to build directory 2020-06-24 18:19:28 -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 Silence 'make checkbashisms' 2020-08-20 13:45:47 -07:00
META Tag 2.0.0-rc1 2020-08-25 13:11:25 -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 Update wiki links with new address 2020-06-03 19:46:31 -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

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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.

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Official Resources

Installation

Full documentation for installing OpenZFS on your favorite Linux distribution can be found at the ZoL Site.

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.