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Brian Behlendorf 49be0ccf1f Add zio constructor/destructor 
Add a standard zio constructor and destructor.  Normally, this is
done to reduce to cost of allocating a new structure by reducing
expensive operations such as memory allocations.  However, in this
case none of the operations moved out of zio_create() were really
very expensive.

This change was principly made as a debug patch (and workaround)
for a zio_destroy() race.  The is good evidence that zio_create()
is reinitializing a mutex which is really still in use by another
thread.  This would completely explain the observed symptoms in
the issue report.

This patch doesn't fix the root cause of the race, but it should
make it less likely by only initializing the mutex once in the
constructor.  Also, this particular flaw might have gone unnoticed
in other zfs implementations due to the specific implementation
details of Linux ticket spinlocks.

Once the real root cause is determined and resolved this change
can be safely reverted.  Until then this should help workaround
the issue.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #496
2012-03-21 14:51:44 -07:00
cmd Use stderr for 'no pools/datasets available' error 2012-03-15 10:24:00 -07:00
config Fix distribution detection 2012-03-05 10:38:27 -08:00
dracut Cleanly support debug packages 2012-02-27 14:08:17 -08:00
etc Cleanly support debug packages 2012-02-27 14:08:17 -08:00
include Add sa_spill_rele() interface 2012-03-07 16:28:00 -08:00
lib Align parition end on 1 MiB boundary 2012-03-05 09:49:50 -08:00
man Cleanly support debug packages 2012-02-27 14:08:17 -08:00
module Add zio constructor/destructor 2012-03-21 14:51:44 -07:00
patches Add build system 2010-08-31 13:41:27 -07:00
scripts Cleanly support debug packages 2012-02-27 14:08:17 -08:00
udev Cleanly support debug packages 2012-02-27 14:08:17 -08:00
.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
autogen.sh Make autogen.sh executable 2011-07-26 10:15:35 -07:00
ChangeLog Add build system 2010-08-31 13:41:27 -07:00
configure Fix distribution detection 2012-03-05 10:38:27 -08:00
configure.ac Add make rule for building Arch Linux packages 2011-12-14 19:14:23 -08:00
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
DISCLAIMER Update COPYRIGHT and DISCLAIMER. 2010-05-18 10:32:23 -07:00
Makefile.am Add the release component to headers 2012-01-18 12:19:47 -08:00
Makefile.in Cleanly support debug packages 2012-02-27 14:08:17 -08:00
META ZFS 0.6.0-rc7 2012-03-16 11:25:13 -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_config.h.in Cleanly support debug packages 2012-02-27 14:08:17 -08:00
zfs-modules.spec.in Cleanly support debug packages 2012-02-27 14:08:17 -08:00
zfs-script-config.sh.in Unconditionally load core kernel modules 2010-11-11 11:38:25 -08:00
ZFS.RELEASE Update to onnv_147 2010-08-26 14:24:34 -07:00
zfs.spec.in Fix rpm dependencies 2012-01-18 12:19:52 -08:00

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