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Fabian-Gruenbichler b119e2c6f1 SIMD: Use alloc_pages_node to force alignment 
fxsave and xsave require the target address to be 16-/64-byte aligned.

kmalloc(_node) does not (yet) offer such fine-grained control over
alignment[0,1], even though it does "the right thing" most of the time
for power-of-2 sizes. unfortunately, alignment is completely off when
using certain debugging or hardening features/configs, such as KASAN,
slub_debug=Z or the not-yet-upstream SLAB_CANARY.

Use alloc_pages_node() instead which allows us to allocate page-aligned
memory. Since fpregs_state is padded to a full page anyway, and this
code is only relevant for x86 which has 4k pages, this approach should
not allocate any unnecessary memory but still guarantee the needed
alignment.

0: https://lwn.net/Articles/787740/
1: https://lore.kernel.org/linux-block/20190826111627.7505-1-vbabka@suse.cz/

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #9608 
Closes #9674
2019-12-10 12:53:25 -08:00
.github Fixes typo from #9681 2019-12-09 10:10:55 -08:00
cmd Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
config Remove zfs_vdev_elevator module option 2019-11-27 10:35:49 -08:00
contrib Skip loading already loaded key 2019-11-08 14:34:07 -08:00
etc Fix encryption logic in systemd mount generator 2019-11-27 10:54:49 -08:00
include SIMD: Use alloc_pages_node to force alignment 2019-12-10 12:53:25 -08:00
lib Replace ASSERTV macro with compiler annotation 2019-12-05 12:37:00 -08:00
man Disable EDONR on FreeBSD 2019-12-05 13:10:29 -08:00
module Abstract away platform specific superblock references 2019-12-10 09:21:07 -08:00
rpm Canonicalize Python shebangs 2019-09-12 13:32:32 -07:00
scripts Move platform independent tests to a shared runfile 2019-10-09 10:39:26 -07:00
tests ZTS: Fixes for spurious failures of resilver_restart_001 test 2019-12-10 09:10:36 -08:00
udev Restore :: in Makefile.am 2019-08-26 11:48:31 -07:00
.gitignore Adapt gitignore for modules 2019-12-02 13:23:47 -08:00
.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
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
CODE_OF_CONDUCT.md Add CODE_OF_CONDUCT.md 2019-04-30 10:58:45 -07:00
configure.ac Prevent unnecessary resilver restarts 2019-11-27 10:15:01 -08:00
copy-builtin copy-builtin: SPL must be in Kbuild first (again) 2019-09-11 11:09:50 -07:00
COPYRIGHT OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am Perform KABI checks in parallel 2019-10-01 12:50:34 -07:00
META Linux compat: Minimum kernel version 3.10 2019-11-12 08:59:06 -08:00
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
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.