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Brian Behlendorf 68121a03da Allow arc_evict_ghost() to only evict meta data 
The default behavior of arc_evict_ghost() is to start by evicting
data buffers.  Then only if the requested number of bytes to evict
cannot be satisfied by data buffers move on to meta data buffers.

This is ideal for honoring arc_c since it's preferable to keep the
meta data cached.  However, if we're trying to free memory from the
arc to honor the meta limit it's a problem because we will need to
discard all the data to get to the meta data.

To avoid this issue the arc_evict_ghost() is now passed a fourth
argumented describing which buffer type to start with.  The
arc_evict() function already behaves exactly like this for a
same reason so this is consistent with the existing code.

All existing callers have been updated to pass ARC_BUFC_DATA so
this patch introduces no functional change.  New callers may
pass ARC_BUFC_METADATA to skip immediately to evicting meta
data leaving the normal data untouched.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
2013-08-09 10:06:08 -07:00
cmd Fix 'zpool list -H' error code 2013-07-23 12:39:05 -07:00
config Fix arc_adapt() spinning in iterate_supers_type() 2013-07-17 09:28:06 -07:00
dracut Refresh dracut module setup 2013-03-21 12:51:06 -07:00
etc Improve OpenRC init script 2013-06-18 17:03:25 -07:00
include Illumos #3964 L2ARC should always compress metadata buffers 2013-08-08 13:37:00 -07:00
lib Fix zpool_read_label() 2013-07-09 16:02:04 -07:00
man Fix man page for the sync property 2013-08-07 16:10:21 -07:00
module Allow arc_evict_ghost() to only evict meta data 2013-08-09 10:06:08 -07:00
patches Adding grub2 mkconfig support patch 2012-07-30 16:17:23 -07:00
rpm Add kmod repo integration 2013-08-01 09:48:07 -07:00
scripts Add kmod repo integration 2013-08-01 09:48:07 -07:00
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
AUTHORS Fix minor typos and update marketing copy. 2013-03-21 12:51:06 -07:00
autogen.sh build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
configure.ac Modified arcstat.py to run on linux 2013-06-18 15:43:15 -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 build: do not call boilerplate ourself 2013-04-02 10:55:20 -07:00
META Tag zfs-0.6.1 2013-03-26 08:50:29 -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 Retire zpool_id infrastructure 2013-01-29 12:23:17 -08:00
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