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Alex Zhuravlev 3910184d9e Use zap_count instead of cached z_size for unlink 
As a performance optimization Lustre does not strictly update
the SA_ZPL_SIZE when adding/removing from non-directory entries.
This results in entries which cannot be removed through the ZPL
layer even though the ZAP is empty and safe to remove.

Resolve this issue by checking the zap_count() directly instead
on relying on the cached SA_ZPL_SIZE.  Micro-benchmarks show no
significant performance impact due to the additional overhead
of using zap_count().

Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Signed-off-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7019
2018-01-09 16:16:07 -08:00
.github Reduce codecov PR comments 2018-01-09 11:15:55 -08:00
cmd Fix unused variable warnings 2018-01-09 12:28:03 -08:00
config Fix --with-systemd on Debian-based distributions (#6963) 2017-12-17 14:08:48 -08:00
contrib Honor --with-mounthelperdir where applicable 2017-12-17 14:14:07 -08:00
etc Cleanup systemd dependencies 2017-11-08 09:39:15 -08:00
include Revert raidz_map and _col structure types 2018-01-09 14:46:52 -08:00
lib Remove lib/libspl/include/sys/frame.h 2017-12-17 14:02:29 -08:00
man Fix percentage styling in zfs-module-parameters.5 2018-01-09 11:51:11 -08:00
module Use zap_count instead of cached z_size for unlink 2018-01-09 16:16:07 -08:00
rpm Fix --with-systemd on Debian-based distributions (#6963) 2017-12-17 14:08:48 -08:00
scripts OpenZFS 8794 - cstyle generates warnings with recent perl 2017-12-19 12:54:08 -08:00
tests OpenZFS 8909 - 8585 can cause a use-after-free kernel panic 2017-12-28 10:18:04 -08:00
udev Fix spelling 2017-01-03 11:31:18 -06:00
.gitignore Add configure option to enable gcov analysis 2017-09-15 10:24:13 -07:00
.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 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 2017-11-07 14:53:57 -08:00
copy-builtin Allow c99 when building ZFS in the kernel tree 2017-03-27 12:31:15 -07:00
COPYRIGHT Encryption patch follow-up 2017-10-11 16:54:48 -04:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am Update for cppcheck v1.80 2017-11-18 14:08:00 -08:00
META Tag zfs-0.7.0 2017-07-26 10:13:25 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Add scan.coverity.com badge to README 2017-10-30 16:21:24 -07:00
TEST Refresh TEST file to include new variables 2017-11-08 11:09:30 -08:00
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.