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Matthew Ahrens 01937958ce OpenZFS 9577 - remove zfs_dbuf_evict_key tsd 
The zfs_dbuf_evict_key TSD (thread-specific data) is not necessary -
we can instead pass a flag down in a few places to prevent recursive
dbuf eviction. Making this change has 3 benefits:

1. The code semantics are easier to understand.
2. On Linux, performance is improved, because creating/removing
   TSD values (by setting to NULL vs non-NULL) is expensive, and
   we do it very often.
3. According to Nexenta, the current semantics can cause a
   deadlock when concurrently calling dmu_objset_evict_dbufs()
   (which is rare today, but they are working on a "parallel
   unmount" change that triggers this more easily):

Porting Notes:
* Minor conflict with OpenZFS 9337 which has not yet been ported.

Authored by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Serapheim Dimitropoulos <serapheim.dimitro@delphix.com>
Reviewed by: Brad Lewis <brad.lewis@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://illumos.org/issues/9577
OpenZFS-commit: https://github.com/openzfs/openzfs/pull/645
External-issue: DLPX-58547
Closes #7602
2019-02-22 09:47:34 -08:00
.github Update codecov.yml 2018-03-14 16:10:36 -07:00
cmd Honor --with-mounthelperdir where applicable 2019-02-22 09:47:34 -08:00
config Fix statfs(2) for 32-bit user space 2018-11-08 14:38:28 -08:00
contrib Honor --with-mounthelperdir where applicable 2019-02-22 09:47:34 -08:00
etc chmod -x on etc/init.d/zfs-*.in automake files 2018-05-07 17:19:57 -07:00
include OpenZFS 9577 - remove zfs_dbuf_evict_key tsd 2019-02-22 09:47:34 -08:00
lib Revert "zpool reopen should detect expanded devices" 2018-09-13 10:11:42 -07:00
man OpenZFS 8906 - uts: illumos rootfs should support salted cksum 2018-07-06 02:46:51 -07:00
module OpenZFS 9577 - remove zfs_dbuf_evict_key tsd 2019-02-22 09:47:34 -08:00
rpm Tag zfs-0.7.12 2018-11-08 14:38:37 -08:00
scripts Support Debian DKMS builds 2018-07-06 02:46:51 -07:00
tests ZTS: Update O_TMPFILE support check 2018-11-08 14:38:28 -08:00
udev Fix spelling 2017-01-03 11:31:18 -06:00
.gitignore Add configure option to enable gcov analysis 2018-03-14 16:10:36 -07:00
.gitmodules Add zimport.sh compatibility test script 2014-02-21 12:10:31 -08:00
AUTHORS Add a missing > to AUTHORS 2014-09-02 14:18:53 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac contrib/initramfs: switch to automake 2019-02-22 09:47:33 -08:00
copy-builtin Allow c99 when building ZFS in the kernel tree 2017-03-27 12:31:15 -07:00
COPYRIGHT Update ZED copyright boilerplate 2015-05-11 15:07:00 -07:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am Add support for "--enable-code-coverage" option 2018-03-14 16:10:36 -07:00
META Tag zfs-0.7.12 2018-11-08 14:38:37 -08:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Update codecov.yml 2018-03-14 16:10:36 -07:00
TEST Retire filebench testing 2017-06-01 06:24:28 -07:00
zfs-script-config.sh.in zpool iostat/status -c improvements 2017-06-05 10:52:15 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.markdown

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.