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OpenZFS on Linux and FreeBSD
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Brian Behlendorf cb255ae572 Remove default GFP_NOFS allocations 
As originally described in commit 82b8c8fa64
this was done to prevent certain deadlocks from occuring in the system.
However, as suspected the price for doing this proved to be too high.
The VM is having a hard time effectively reclaiming memory thus we are
reverting this change.

However, we still need to fundamentally handle the issue.  Under
Solaris the KM_PUSHPAGE mask is used commonly in I/O paths to ensure
a memory allocations will succeed.  We leverage this fact and redefine
KM_PUSHPAGE to include GFP_NOFS.  This ensures that in these common
I/O path we don't trigger additional reclaim.  This minimizes the
change to the Solaris code.
 		2011-03-19 14:50:39 -07:00
cmd Support custom build directories 2010-09-05 21:49:05 -07:00
config Make Missing Modules.symvers Fatal 2011-03-07 13:09:01 -08:00
include Remove default GFP_NOFS allocations 2011-03-19 14:50:39 -07:00
lib Support custom build directories 2010-09-05 21:49:05 -07:00
module Remove xvattr support 2011-03-02 11:34:46 -08:00
patches Reimplement rwlocks for Linux lock profiling/analysis. 2009-09-18 16:09:47 -07:00
scripts Add zlib regression test 2011-02-25 16:56:46 -08:00
.gitignore Ignore unsigned module build products 2010-03-11 14:29:17 -08:00
AUTHORS Public Release Prep 2010-05-17 15:18:00 -07:00
COPYING Public Release Prep 2010-05-17 15:18:00 -07:00
ChangeLog Prep for spl-0.5.0 tag 2010-08-13 09:33:50 -07:00
DISCLAIMER Public Release Prep 2010-05-17 15:18:00 -07:00
INSTALL Public Release Prep 2010-05-17 15:18:00 -07:00
META Prep spl-0.6.0-rc2 tag 2011-03-09 15:16:10 -08:00
Makefile.am Support custom build directories 2010-09-05 21:49:05 -07:00
Makefile.in Support custom build directories 2010-09-05 21:49:05 -07:00
README.markdown Fix markdown rendering 2010-09-15 09:05:34 -07:00
autogen.sh Public Release Prep 2010-05-17 15:18:00 -07:00
configure Make Missing Modules.symvers Fatal 2011-03-07 13:09:01 -08:00
configure.ac Support custom build directories 2010-09-05 21:49:05 -07:00
spl-modules.spec.in Minor spec file cleanup for RHEL6 package dependency. 2010-05-21 11:53:49 -07:00
spl.spec.in Remove usage of the __id_u macro for portability. 2009-10-05 12:51:58 -07:00
spl_config.h.in Linux compat 2.6.37, invalidate_inodes() 2011-02-23 12:44:32 -08:00

README.markdown

The Solaris Porting Layer (SPL) is a Linux kernel module which provides many of the Solaris kernel APIs. This shim layer makes it possible to run Solaris kernel code in the Linux kernel with relatively minimal modification. This can be particularly useful when you want to track upstream Solaris development closely and don’t want the overhead of maintaining a large patch which converts Solaris primitives to Linux primitives.

To build packages for your distribution:

$ ./configure
$ make pkg

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