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Attila Fülöp 8e94ac0e36
Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state
Linux 5.16 moved XSTATE_XSAVE and XSTATE_XRESTORE out of our reach,
so add our own XSAVE{,OPT,S} code and use it for Linux 5.16.

Please note that this differs from previous behavior in that it
won't handle exceptions created by XSAVE an XRSTOR. This is sensible
for three reasons.

 - Exceptions during XSAVE and XRSTOR can only occur if the feature
   is not supported or enabled or the memory operand isn't aligned
   on a 64 byte boundary. If this happens something else went
   terribly wrong, and it may be better to stop execution.

 - Previously we just printed a warning and didn't handle the fault,
   this is arguable for the above reason.

 - All other *SAVE instruction also don't handle exceptions, so this
   at least aligns behavior.

Finally add a test to catch such a regression in the future.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Attila Fülöp <attila@fueloep.org>
Closes #13042
Closes #13059
2022-02-09 12:50:10 -08:00
.github Remove unused files from GitHub runners 2022-02-09 11:50:13 -08:00
cmd mount.zfs -o zfsutil leverages zfs_mount_at() 2022-02-08 10:53:23 -08:00
config Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state 2022-02-09 12:50:10 -08:00
contrib Add --enable=all to ShellCheck by default 2022-02-07 11:59:09 -08:00
etc Add --enable=all to ShellCheck by default 2022-02-07 11:59:09 -08:00
include Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state 2022-02-09 12:50:10 -08:00
lib Add --enable-asan and --enable-ubsan switches 2022-02-03 14:35:38 -08:00
man tests: prune remaining xargs(1), add missing zfs-project -c0 note 2022-01-26 11:30:09 -08:00
module Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state 2022-02-09 12:50:10 -08:00
rpm Add --enable-asan and --enable-ubsan switches 2022-02-03 14:35:38 -08:00
scripts Add --enable=all to ShellCheck by default 2022-02-07 11:59:09 -08:00
tests Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state 2022-02-09 12:50:10 -08:00
udev Udev rules: remove zvol compat symlinks (without the leading zvol/) 2021-07-06 13:41:17 -07:00
.editorconfig Add an .editorconfig; document git whitespace settings 2020-01-27 13:32:52 -08:00
.gitignore Add FreeBSD support to OpenZFS 2020-04-14 11:36:28 -07:00
.gitmodules .gitmodules: link to openzfs github repository 2021-04-12 09:37:23 -07:00
AUTHORS Add zstd support to zfs 2020-08-20 10:30:06 -07:00
autogen.sh Cause autogen.sh to fail if autoreconf fails 2018-07-06 09:27:37 -07:00
CODE_OF_CONDUCT.md Replace ZFS on Linux references with OpenZFS 2020-10-08 20:10:13 -07:00
configure.ac Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state 2022-02-09 12:50:10 -08:00
copy-builtin copy-builtin: posix conformance 2021-05-08 08:58:26 -07:00
COPYRIGHT Fix typos 2020-06-09 21:24:09 -07:00
LICENSE Update build system and packaging 2018-05-29 16:00:33 -07:00
Makefile.am Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
META Linux 5.15 compat: META (#12824) 2021-12-07 15:35:42 -08:00
NEWS Fix NEWS file 2020-08-26 21:44:41 -07:00
NOTICE Update build system and packaging 2018-05-29 16:00:33 -07:00
README.md README: Update OpenZFS website url 2022-01-06 16:25:01 -08:00
RELEASES.md Add RELEASES.md file 2021-04-02 16:33:40 -07:00
TEST Remove CI builder customization from TEST 2020-03-16 10:46:03 -07:00
zfs.release.in Move zfs.release generation to configure step 2012-07-12 12:22:51 -07:00

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OpenZFS is an advanced file system and volume manager which was originally developed for Solaris and is now maintained by the OpenZFS community. This repository contains the code for running OpenZFS on Linux and FreeBSD.

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Official Resources

Installation

Full documentation for installing OpenZFS on your favorite operating system can be found at the Getting Started Page.

Contribute & Develop

We have a separate document with contribution guidelines.

We have a Code of Conduct.

Release

OpenZFS 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 Linux kernel versions.
  • Supported FreeBSD versions are any supported branches and releases starting from 12.2-RELEASE.