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OpenZFS on Linux and FreeBSD
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Richard Yao 518b487602 Update ARC memory limits to account for SLUB internal fragmentation 
23bdb07d4e updated the ARC memory limits
to be 1/2 of memory or all but 4GB. Unfortunately, these values assume
zero internal fragmentation in the SLUB allocator, when in reality, the
internal fragmentation could be as high as 50%, effectively doubling
memory usage. This poses clear safety issues, because it permits the
size of ARC to exceed system memory.

This patch changes this so that the default value of arc_c_max is always
1/2 of system memory. This effectively limits the ARC to the memory that
the system has physically installed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #660
 		2012-04-30 10:04:34 -07:00
cmd Illumos #2067: uninitialized variables in zfs(1M) may make snapshots undestroyable 2012-04-27 15:17:23 -07:00
config Fix executable permissions 2012-03-26 11:52:44 -07:00
dracut Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00
etc Make Gentoo initscript use modinfo 2012-04-03 10:37:18 -07:00
include Illumos #1951: leaking a vdev when removing an l2cache device 2012-04-11 11:32:06 -07:00
lib Improve error message consistency 2012-04-11 10:43:17 -07:00
man ZFS list snapshot property alias 2012-04-11 12:02:46 -07:00
module Update ARC memory limits to account for SLUB internal fragmentation 2012-04-30 10:04:34 -07:00
patches Add build system 2010-08-31 13:41:27 -07:00
scripts Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00
udev Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00
.gitignore Ignore unsigned module build products 2010-03-09 14:14:09 -08:00
AUTHORS Add "ashift" property to zpool create 2011-06-17 16:35:49 -07:00
COPYING Relocate COPYING+COPYRIGHT, remove README cruft 2008-12-01 15:34:53 -08:00
COPYRIGHT Update COPYRIGHT to reference zpios CDDL exceptions. 2010-05-18 14:25:28 -07:00
ChangeLog Add build system 2010-08-31 13:41:27 -07:00
DISCLAIMER Update COPYRIGHT and DISCLAIMER. 2010-05-18 10:32:23 -07:00
META ZFS 0.6.0-rc8 2012-03-26 11:55:32 -07:00
Makefile.am Add the release component to headers 2012-01-18 12:19:47 -08:00
Makefile.in Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00
OPENSOLARIS.LICENSE Add CDDL license file 2008-12-01 14:49:34 -08:00
PKGBUILD-zfs-modules.in Add make rule for building Arch Linux packages 2011-12-14 19:14:23 -08:00
PKGBUILD-zfs.in Add make rule for building Arch Linux packages 2011-12-14 19:14:23 -08:00
README.markdown Fix markdown rendering 2010-09-15 09:09:37 -07:00
ZFS.RELEASE Update to onnv_147 2010-08-26 14:24:34 -07:00
autogen.sh Make autogen.sh executable 2011-07-26 10:15:35 -07:00
configure Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00
configure.ac Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00
zfs-modules.spec.in Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00
zfs-script-config.sh.in Unconditionally load core kernel modules 2010-11-11 11:38:25 -08:00
zfs.spec.in Fix rpm dependencies 2012-01-18 12:19:52 -08:00
zfs_config.h.in Add --enable-debug-dmu-tx configure option 2012-03-23 12:25:17 -07:00

README.markdown

Native ZFS for Linux! ZFS is an advanced file system and volume manager which was originally developed for Solaris. It has been successfully ported to FreeBSD and now there is a functional Linux ZFS kernel port too. The port currently includes a fully functional and stable SPA, DMU, and ZVOL with a ZFS Posix Layer (ZPL) on the way!

$ ./configure
$ make pkg

Full documentation for building, configuring, and using ZFS can be found at: http://zfsonlinux.org