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Brian Behlendorf 74328ee18f Fix zfs_putpage() lock inversion 
There exists a lock inversions involving the zfs range lock and the
individual page writeback bits which can result in a deadlock.  To
prevent this we must always manipulate the writeback bit while
holding the range lock.  The exact deadlock is as follows:

------ Process A ------        ------ Process B ------
zpl_writepages                 zpl_fallocate
write_cache_pages              zpl_fallocate_common
zpl_putpage                    zfs_space
zfs_putpage (set bit)          zfs_freesp
zfs_range_lock (wait on lock)  zfs_free_range (take lock)
[has not yet initiated I/O,    truncate_inode_pages_range
the bit will not be cleared]   wait_on_page_writeback (wait on bit)

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Richard Yao <richard.yao@clusterhq.com>
Issue #2976
2014-12-22 09:31:56 -08:00
cmd vdev_id: use mawk-compatible regular expression 2014-12-19 12:05:16 -08:00
config Swap DTRACE_PROBE* with Linux tracepoints 2014-11-17 11:13:55 -08:00
contrib Add bash completions by Aneurin Price. 2014-08-06 15:03:28 -07:00
dracut Amend Dracut module to export ZFS root on shutdown 2014-10-07 10:20:56 -07:00
etc Improve systemd script to not leave stale sharetab 2014-12-18 09:54:56 -08:00
include Explicitly include SPL compat headers 2014-11-19 12:30:39 -05:00
lib Swap DTRACE_PROBE* with Linux tracepoints 2014-11-17 11:13:55 -08:00
man Fix small spelling mistake 2014-11-14 15:48:51 -08:00
module Fix zfs_putpage() lock inversion 2014-12-22 09:31:56 -08:00
rpm Fix typo in %post scriptlet lines 2014-12-18 18:38:33 -08:00
scripts Swap DTRACE_PROBE* with Linux tracepoints 2014-11-17 11:13:55 -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 a pkgconfig file 2014-08-28 07:59:43 -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 Make license compatibility checks consistent 2014-10-17 14:58:38 -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