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OpenZFS on Linux and FreeBSD
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Matthew Ahrens 7d64595c25 dn_struct_rwlock can not be held in dmu_tx_try_assign() 
The thread calling dmu_tx_try_assign() can't hold the dn_struct_rwlock
while assigning the tx, because this can lead to deadlock. Specifically,
if this dnode is already assigned to an earlier txg, this thread may
need to wait for that txg to sync (the ERESTART case below).  The other
thread that has assigned this dnode to an earlier txg prevents this txg
from syncing until its tx can complete (calling dmu_tx_commit()), but it
may need to acquire the dn_struct_rwlock to do so (e.g. via
dmu_buf_hold*()).

This commit adds an assertion to dmu_tx_try_assign() to ensure that this
deadlock is not inadvertently introduced.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Matthew Ahrens <mahrens@delphix.com>
Closes #8929
 		2019-09-25 11:27:48 -07:00
.github Update CONTRIBUTING to point users to IRC as well as mailing list 2019-03-13 11:57:57 -07:00
cmd Let zfs mount all tolerate in-progress mounts 2019-09-25 11:27:48 -07:00
config Python config cleanup 2019-09-25 11:27:47 -07:00
contrib Replace whereis with type in zfs-lib.sh 2019-09-25 11:27:48 -07:00
etc Fix zfs-mount-generator for datasets with spaces 2019-05-07 09:32:23 -07:00
include Fix comments on zfs_bookmark_phys 2019-09-25 11:27:48 -07:00
lib Add libnvpair to libzfs pkg-config 2019-09-25 11:27:48 -07:00
man panic in removal_remap test on 4K devices 2019-09-25 11:27:47 -07:00
module dn_struct_rwlock can not be held in dmu_tx_try_assign() 2019-09-25 11:27:48 -07:00
rpm Remove arch and relax version dependency 2019-09-25 11:27:48 -07:00
scripts Avoid updating zfs_gitrev.h when rev is unchanged 2019-09-25 11:27:47 -07:00
tests zstreamdump: add per-record-type counters and an overhead counter 2019-09-25 11:27:48 -07:00
udev Add enclosure_symlinks option to vdev_id 2018-12-14 17:27:49 -08:00
.gitignore git ignore python 3.7 virtual environment directories 2019-03-25 15:05:26 -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
CODE_OF_CONDUCT.md Add CODE_OF_CONDUCT.md 2019-04-30 10:58:45 -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
META Tag zfs-0.8.1 2019-06-14 09:43:18 -07:00
Makefile.am zfs-tests: fix warnings when packaging some .shlib files 2019-06-07 12:39:13 -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
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
configure.ac Add TRIM support 2019-03-29 09:13:20 -07:00
copy-builtin Allow copy-builtin to work with modified sources 2018-10-17 12:06:05 -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.