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Justin Gottula cffa8372f4 Fix most zfs_arc_* mod params not actually being modifiable at runtime 
Most of the zfs_arc_* module parameters do not have their values used by
the ARC code directly. Instead, there is a function, arc_tuning_update,
which is called during module initialization and periodically
thereafter, whose job is to fetch the module parameter values, clamp/
limit them appropriately, and then assign those values to a separate set
of internal variables that are actually referenced by the ARC code.

Commit 3ec34e55 featured an overhaul of arc_reclaim_thread, which is the
former location where the post-init-time calls to arc_tuning_update
would occur. The rework split the work previously done by the
arc_reclaim_thread into a pair of replacement threads; and
unfortunately, the call to arc_tuning_update fell through the cracks and
was lost in the reorganization.

This meant that changing almost any ARC-related zfs module parameter via
/sys/module/zfs/parameters/ would result in the module parameter value
itself appearing to change; however the modification would not actually
propagate to the ARC code and have any real effect.

This commit reinstates the post-init-time call to arc_tuning_update. It
is now called during arc_adjust_cb_check; this should be equivalent to
its former call location in arc_reclaim_thread.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Justin Gottula <justin@jgottula.com>
Closes #8405 
Closes #8463
2019-03-12 15:03:59 -07:00
.github Bump commit subject length to 72 characters 2019-01-08 09:23:05 -08:00
cmd Avoid retrieving unused snapshot props 2019-03-12 13:13:22 -07:00
config kernel_fpu fixes 2019-03-06 16:03:03 -08:00
contrib initramfs/debian: use panic() instead of directly calling /bin/sh 2019-02-28 12:05:55 -08:00
etc Remove zfs-zed hard dep from zfs-share init script 2019-02-28 12:07:03 -08:00
include Avoid retrieving unused snapshot props 2019-03-12 13:13:22 -07:00
lib Avoid retrieving unused snapshot props 2019-03-12 13:13:22 -07:00
man Do not resume a pool if multihost is enabled 2019-02-28 17:56:19 -08:00
module Fix most zfs_arc_* mod params not actually being modifiable at runtime 2019-03-12 15:03:59 -07:00
rpm Add diffutils dependency for dkms build 2019-02-20 10:04:05 -08:00
scripts OpenZFS 9185 - Enable testing over NFS in ZFS performance tests 2019-02-04 09:27:37 -08:00
tests MMP writes rotate over leaves 2019-03-12 10:37:06 -07:00
udev Add enclosure_symlinks option to vdev_id 2018-12-14 17:27:49 -08:00
.gitignore Verify .gitignore entries 2019-01-15 11:56:29 -08:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
.travis.yml Add .travis.yml 2017-11-13 09:18:18 -08:00
AUTHORS Update build system and packaging 2018-05-29 16:00:33 -07:00
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
configure.ac config: better libtirpc detection 2019-03-02 16:19:05 -08:00
copy-builtin Allow copy-builtin to work with modified sources 2018-10-17 12:06:05 -07:00
COPYRIGHT Update build system and packaging 2018-05-29 16:00:33 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am Verify .gitignore entries 2019-01-15 11:56:29 -08:00
META Tag 0.8.0-rc3 2019-01-14 12:40:42 -08:00
NEWS Add NEWS file 2018-09-18 12:03:47 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md Explicitly state supported Linux versions 2018-05-30 20:11:19 -07:00
TEST Update build system and packaging 2018-05-29 16:00:33 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.md

img

ZFS on Linux is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community.

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Official Resources

Installation

Full documentation for installing ZoL on your favorite Linux distribution can be found at our site.

Contribute & Develop

We have a separate document with contribution guidelines.

Release

ZFS on Linux 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 kernel versions.