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Tom Caputi e7a2fa70c3 Fix deadlock in 'zfs rollback' 
Currently, the 'zfs rollback' code can end up deadlocked due to
the way the kernel handles unreferenced inodes on a suspended fs.
Essentially, the zfs_resume_fs() code path may cause zfs to spawn
new threads as it reinstantiates the suspended fs's zil. When a
new thread is spawned, the kernel may attempt to free memory for
that thread by freeing some unreferenced inodes. If it happens to
select inodes that are a a part of the suspended fs a deadlock
will occur because freeing inodes requires holding the fs's
z_teardown_inactive_lock which is still held from the suspend.

This patch corrects this issue by adding an additional reference
to all inodes that are still present when a suspend is initiated.
This prevents them from being freed by the kernel for any reason.

Reviewed-by: Alek Pinchuk <apinchuk@datto.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #9203
2019-08-27 09:55:51 -07:00
.github Update CONTRIBUTING to point users to IRC as well as mailing list 2019-03-13 11:57:57 -07:00
cmd Fix automake program name transformations 2019-08-20 17:46:40 -04:00
config Minor style cleanup 2019-07-16 17:22:31 -07:00
contrib Restore :: in Makefile.am 2019-08-26 11:48:31 -07:00
etc Restore :: in Makefile.am 2019-08-26 11:48:31 -07:00
include Fix deadlock in 'zfs rollback' 2019-08-27 09:55:51 -07:00
lib Fix device expansion when VM is powered off 2019-08-13 21:18:53 -06:00
man Cap metaslab memory usage 2019-08-16 09:08:21 -06:00
module Fix deadlock in 'zfs rollback' 2019-08-27 09:55:51 -07:00
rpm initramfs: fixes for (debian) initramfs 2019-08-16 09:02:32 -06:00
scripts Split argument list, satisfy shellcheck SC2086 2019-08-25 18:30:39 -07:00
tests Restore :: in Makefile.am 2019-08-26 11:48:31 -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 Add channel program for property based snapshots 2019-07-30 16:02:19 -07:00
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 Restore :: in Makefile.am 2019-08-26 11:48:31 -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.