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Tom Caputi 5815f7ac30 Fix stalled txg with repeated noop scans 
Currently, the DSL scan code figures out when it should suspend
processing and allow a txg to continue by calling the function
dsl_scan_check_suspend(). Unfortunately, this function only
allows the scan to suspend at a level 0 block. In the event that
the system is scanning a bunch of empty snapshots or a resilver
is running with a high enough scn_cur_min_txg, the scan will
stop processing each dataset at the root level, deciding it
has nothing left to do. This means that the check_suspend
function is never called and the txg remains stuck until a
dataset is found that has data to scan.

This patch fixes the problem by allowing scans to suspend at
the root level of the objset. For backwards compatibility, we
use the bookmark <objsetid, 0, 0, 0> when we suspend here so
that older versions of the code will work as intended.

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #9300
2019-09-11 11:16:48 -07:00
.github Fix typos 2019-09-02 18:17:39 -07:00
cmd Add/generalize abstractions in arc_summary3 2019-09-10 13:27:53 -07:00
config OpenZFS restructuring - move platform specific headers 2019-09-05 09:34:54 -07:00
contrib Fix typos in contrib/ 2019-08-30 09:44:43 -07:00
etc Fix typos in etc/ 2019-08-30 09:46:52 -07:00
include Fix /etc/hostid on root pool deadlock 2019-09-10 13:42:30 -07:00
lib OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
man Fix typos in man/ 2019-08-30 09:41:35 -07:00
module Fix stalled txg with repeated noop scans 2019-09-11 11:16:48 -07:00
rpm BuildRequires libtirpc-devel needed for RHEL 8 2019-09-06 11:30:07 -07:00
scripts kmodtool: depmod path 2019-09-11 11:14:50 -07:00
tests Fix /etc/hostid on root pool deadlock 2019-09-10 13:42:30 -07:00
udev Restore :: in Makefile.am 2019-08-26 11:48:31 -07:00
.gitignore Linux 5.3 compat: Makefile subdir-m no longer supported 2019-08-19 15:22:52 -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 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
CODE_OF_CONDUCT.md Add CODE_OF_CONDUCT.md 2019-04-30 10:58:45 -07:00
configure.ac OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
copy-builtin copy-builtin: SPL must be in Kbuild first (again) 2019-09-11 11:09:50 -07:00
COPYRIGHT OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
META Tag 0.8.0 2019-05-21 11:11:41 -07:00
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

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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.