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Chunwei Chen 07012da668 Fix kernel panic due to tsd_exit in ZFS_EXIT(zsb) 
The following panic would occur under certain heavy load:
[ 4692.202686] Kernel panic - not syncing: thread ffff8800c4f5dd60 terminating with rrw lock ffff8800da1b9c40 held
[ 4692.228053] CPU: 1 PID: 6250 Comm: mmap_deadlock Tainted: P           OE  3.18.10 #7

The culprit is that ZFS_EXIT(zsb) would call tsd_exit() every time, which
would purge all tsd data for the thread. However, ZFS_ENTER is designed to be
reentrant, so we cannot allow ZFS_EXIT to blindly purge tsd data.

Instead, we rely on the new behavior of tsd_set. When NULL is passed as the
new value to tsd_set, it will automatically remove the tsd entry specified the
the key for the current thread.

rrw_tsd_key and zfs_allow_log_key already calls tsd_set(key, NULL) when
they're done. The zfs_fsyncer_key relied on ZFS_EXIT(zsb) to call tsd_exit() to
do clean up. Now we explicitly call tsd_set(key, NULL) on them.

Signed-off-by: Chunwei Chen <tuxoko@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #3247
2015-04-24 14:57:54 -07:00
cmd Fix io-spare.sh to work with disk vdevs 2015-04-17 14:21:26 -07:00
config Add RHEL style kmod packages 2015-03-27 14:41:48 -07:00
contrib Add bash completions by Aneurin Price. 2014-08-06 15:03:28 -07:00
dracut Execute udevadm settle before trying to import pools 2015-03-24 13:38:55 -07:00
etc Rebuild init scripts on source file updates 2015-04-14 13:26:49 -07:00
include Fix kernel panic due to tsd_exit in ZFS_EXIT(zsb) 2015-04-24 14:57:54 -07:00
lib Support the "version" property on volumes via the zfs_prop_get_int() API 2015-04-24 11:08:37 -07:00
man Fix formatting error in zfs(8) 2015-04-23 13:59:00 -07:00
module Fix kernel panic due to tsd_exit in ZFS_EXIT(zsb) 2015-04-24 14:57:54 -07:00
rpm Tag zfs-0.6.4 2015-04-08 20:16:45 -07:00
scripts Set zfs_autoimport_disable default value to 1 2015-02-17 16:09:41 -08:00
udev Open pools asynchronously after module load 2013-07-03 09:24:38 -07:00
.gitignore Ignore *.{deb,rpm,tar.gz} files in the top directory. 2013-04-24 16:18:59 -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 Add RHEL style kmod packages 2015-03-27 14:41:48 -07:00
copy-builtin Consistent menuconfig name 2012-08-26 13:49:37 -07:00
COPYRIGHT Refresh links to web site 2013-03-06 15:46:41 -08:00
DISCLAIMER Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
Makefile.am Kernel header installation should respect --prefix 2014-10-28 09:37:06 -07:00
META Tag zfs-0.6.4 2015-04-08 20:16:45 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
README.markdown Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
zfs-script-config.sh.in Initial implementation of zed (ZFS Event Daemon) 2014-04-02 13:10:03 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

README.markdown

Native ZFS for Linux!

ZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the Illumos community.

ZFS on Linux, which is also known as ZoL, is currently feature complete. It includes fully functional and stable SPA, DMU, ZVOL, and ZPL layers.

Full documentation for installing ZoL on your favorite Linux distribution can be found at: http://zfsonlinux.org