zfs/ChangeLog

2009-06-22 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.4

	* : Added SLES10 support.  This includes all compatibility
	changes to support 2.6.16 based kernels and the required
	build system improvements.

	* : Build System changes for SLES10:
	- Exclude -obj when detecting installed kernel source.
	- Detect -obj directory for out of tree kernel builds.
	- Allow kernel build system to set CC to ensure -m64 is set properly.
	  This is an issue on 64-bit SLES systems which by default always
	  build 32-bit binaries (unlike RHEL/Fedora which default to 64-bit)

	* : Configure Checks added for SLES10:
	- div64_64() renamed to div64_u64() as of 2.6.26.
	- global_page_state() fuction was introduced in 2.6.18 kernels.
	  The earlier 2.6.16 based SLES10 must not try and use it,
	  thankfully get_zone_counts() is still available.
	- monotonic_clock() is unavailable __gethrtime() must perform the
	  HZ division as an 'unsigned long long' because the SPL only
	  implements __udivdi3(), and not __divdi3() for 'long long'
	  division on 32-bit arches.
	- mutex_lock_nested() was introduced as part of the mutex
	  validator in 2.6.18, when it is unavailable it is safe to
	  fallback to using a plain mutex_lock().
	- SLES specific API change to vfs_unlink() and vfs_rename() which
	  added a 'struct vfsmount *' argument.  This was for something
	  called the linux-security-module, but it appears that it was
	  never adopted upstream.
	- spl_device_create() correctly mapped to class_device_create()
	  for 2.6.13 to 2.6.17 based kernels, this is the preferred API.
	- Prior to 2.6.17 there were no *_pgdat helper functions in 
	  mm/mmzone.c.  Instead for_each_zone() operated directly on
	  pgdat_list which may or may not have been exported depending on
	  how your kernel was compiled.  A configure check was added to
	  determine if you have the helpers or not, and if the needed
	  symbols are exported.  If they are not exported then they are
	  dynamically aquired at runtime by kallsyms_lookup_name().

	* : Packaging changes for SLES10
	- Properly honor --prefix in build system and rpm spec file.
	- Add '--define require_kdir' to spec file to support building
	  rpms against kernel sources installed in non-default locations.
	- Add '--define require_kobj' to spec file to support building
	  rpms against kernel object installed in non-default locations.
	- Stop suppressing errors in autogen.sh script.
	- Improved logic to detect missing kernel objects when they are
	  not located with the source.  This is the common case for SLES
	  as well as in-tree chaos kernel builds and is done to simply
	  support for multiple arches.
	- Moved spl-devel build products to /usr/src/spl-<version>, a
	  spl symlink is created to reference the last installed version.
	- Allow checking for exported symbols in both Module.symvers
	  and Module.symvers.  My stock SLES kernel ships an objects
	  directory with Module.symvers, yet produces a Module.symvers
	  in the local build directory.

	* : Added powerpc64 support.
	- Enable builds for powerpc64 ISA type.
	- Add DIV_ROUND_UP and roundup macros if unavailable.
	- Cast 64-bit values for %lld format string to (long long) to
	  quiet compile warning.

	* module/splat/splat-ctl.c: Proper ioctl() 32/64-bit binary
	  compatibility.  We need to ensure the ioctl data itself is always
	  packed the same for 32/64-bit binaries.  Additionally, the correct
	  thing to do is encode this size in bytes as part of the command
	  using _IOC_SIZE().

	* modules/spl/spl-kmem.c: Fixed a long standing bug in the debug
	  tracing.  The tcd_for_each() macro expected a NULL to terminate
	  the trace_data[i] array but this was only ever true due to luck.
	  All trace_data[] iterators are now properly capped by TCD_TYPE_MAX.

	* modules/spl/spl-kmem.c: To simplify debugging all symbols aquired
	  dynamically using spl_kallsyms_lookup_name() are initially poisoned
	  with SYMBOL_POISON.

2009-03-20 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.3

	* configure.ac, *Makefile.am: Build system update.  This includes
	resolving various build issues and adding support for the remaining
	common build targets.  Available targets now include:

	- make all        # Build everything
	- make install    # Install everything
	- make clean      # Clean up build products
	- make distclean  # Clean up everything
	- make dist       # Create package tarball
	- make srpm       # Create package source RPM
	- make rpm        # Create package binary RPMs
	- make tags       # Create ctags and etags for everything

	Extra care was taken to ensure that the source RPMs are fully
	rebuildable against Fedora/RHEL/Chaos kernels.  To build binary
	RPMs from the source RPM for your system simply run:

	rpmbuild --rebuild spl-x.y.z-1.src.rpm

	This will produce two binary RPMs with correct 'requires'
	dependencies for your kernel.  One will contain all zpl modules
	and support utilities, the other is a devel package for compiling
	additional kernel modules which are dependent on the spl.

	spl-x.y.z-1_<kernel version>.x86_64.rpm
	spl-devel-x.y.2-1_<kernel version>.x86_64.rpm

	* : FC10 (linux-2.6.27.19) and i686 compatibility update.  The
	list of support platforms has been extended to include FC10
	systems and x86 architectures.  It should be noted that kernels
	older the 2.6.27.19 should work but have not have not been tested.

	* configure.ac: Fix build issue preventing spl_config.h from being
	cleanly included by dependent packages.

	* module/spl/spl-taskq.c: Fix taskq_wait() not waiting bug.

	* module/spl/spl-xdr.c: Add XDR implementation provided by Ricardo
	Correia from Sun.

	* module/spl/spl-kmem.c: Linux VM integration cleanup.

	* module/spl/spl-kmem.c: Slab cache improvements and fixes.

	* modules/splat/*: Include additional SPLAT regression tests.

	* : Various bug fixes are more clearly detailed in the git
	commit logs.  For a detailed summary of changes post version
	0.4.2 check the git commit logs.

	git log -35

2009-02-05 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.2

	* module/spl/spl-kmem.c include/sys/kmem.h: Slab cache improvements:
	  - Implement kmem cache alignment.
	  - Implement slab ageing.
	  - Optimized slab packing algorithm.
	  - Fixed deadlock due to calling call kv_free() under the skc_lock.
	  - Added additional SPLAT test cases
	  - Performance optimizations

	* module/spl/spl-kmem.c include/sys/kmem.h: Linux VM integration.
	The Solaris global VM symbols minfree, desfree, lotsfree, needfree,
	swapfs_minfree, swapfs_reserve, availrmem, freemem, and physmem are
	now available and loosely integrating with the Linux VM.  Some
	tuning will undoubtably be needed and these tunables are available
	in /proc/sys/kernel/spl/vm/* for this very reason.

	* config/spl-build.m4: New configure checks needed when building
	against 2.6.27+ kernels.  More work is needed here.

	* : Minor cleanup see the 'git log' for full details.

2009-01-21 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.1

	* : Implement ksid_*, ddi_strto*, and system taskq functionality.
	In addition, several other small Solaris compatibility changes 
	were made, see the 'git log' for full details.

2008-11-26 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.0 (Development now done with Git)

	* : Imported SPL SVN repo in to Git Repo for core development.

2008-11-26 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.3.5

	* : Include META file support.

2008-11-05 Jim Garlick <garlick@llnl.gov>

	* : Add autogen.sh products.

	* configure.ac : Use AC_CONFIG_AUX_DIR to put autograph products
	in ./auotconf.

	* autogen.sh : Use --copy to avoid symlinks, remove error
	redirection, run aclocal before libtoolize.

2008-11-13 Brian Behlendorf <behlendorf1@llnl.gov>

	* include/sys/sunddi.h, modules/spl/spl-module.c : Removed default
	udev support from sunddi implementation because it uses GPL-only
	symbols.  This support is optionally available for SPL consumers
	if they define HAVE_GPL_ONLY_SYMBOLS and license their module as
	GPL using the MODULE_LICENSE("GPL") macro.

2008-11-05 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.3.4

	* : Coverity clean.

	* : Patches from Ricardo M. Correia <Ricardo.M.Correia@sun.com> 
	applied with minor revisions:

		spl-00-rm-gpl-symbol-notifier_chain.patch
		spl-01-rm-gpl-symbol-set_cpus_allowed.patch
		spl-02-rm-gpl-symbols-device.patch
		spl-03-rm-gpl-symbol-ktime_get_ts.patch
		spl-04-fix-taskq-spinlock-lockup.patch
		spl-05-div64.patch
		spl-06-atomic64.patch
		spl-07-kmem-cleanup.patch
		spl-08-km-sleep-nofail.patch
		spl-09-fix-kmem-track-oops.patch
		spl-10-fix-assert-verify-ndebug.patch

2008-06-30 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.3.3

	* : modules/sys/kmem-slab.c : Refined SPL slab to include
	per-cpu caches, removed internal hash, other general 
	performance improvements.  Much work remain but it's pretty
	good for an initial implementation.

2008-06-13 Brian Behlendorf <behlendorf1@llnl.gov>

	* : modules/sys/kmem-slab.c : Re-implemented the slab to no
	longer be based on the linux slab but to be it's own complete
	implementation.  The new slab behaves much more like the
	Solaris slab than the Linux slab.

2008-06-04 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.3.2

	* : Extensive improvements to the build system to detect kernel
	API changes so we can flexibly build with a wider range of kernel
	versions.  The code has now been testing with the 2.6.18-32chaos
	and 2.6.25.3-18.fc9 kernels, however we should also be compatible
	with other kernels in the range of 2.6.18-2.6.25.

2008-05-25 Brian Behlendorf <behlendorf1@llnl.gov>

	* configure.ac, autoconf/* : Initial pass at resolving
	API changes introduced by kernels newer than 2.6.18.

2008-05-21 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.3.1

	* : License headers including URCL added for release.

2008-05-21 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.3.0

	* configure.ac: Improved autotools support.

2008-04-26 Brian Behlendorf <behlendorf1@llnl.gov>

	* include/sys/mutex.h : Implemented a close approximation
	of adaptive mutexes.  These changes however required me to 
	export a new symbol from the kernel proper 'task_curr()'
	which means we are now dependant on a patched kernel.

2008-04-24 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.2.1 

	* modules/spl/spl-proc.c : Add /proc/sys/spl/version.

2008-04-24 Herb Wartens <wartens2@llnl.gov>

	* include/sys/kmem.h : Make sure that when calling __vmem_alloc
	that we do not have __GFP_ZERO set.  Once the memory is allocated
	then zero out the memory if __GFP_ZERO is passed to
	__vmem_alloc.

2008-04-16 Herb Wartens <wartens2@llnl.gov>

	* modules/spl/spl-kmem.c : Make sure to disable interrupts
	when necessary to avoid deadlocks.  We were seeing the deadlock
	when calling kmem_cache_generic_constructor() and then an interrupt
	forced us to end up calling kmem_cache_generic_destructor()
	which caused our deadlock.

2008-02-26 Brian Behlendorf <behlendorf1@llnl.gov>

	: Initial commit of the solaris porting layer (spl).  Included
	in addition to the source is an initial autoconf / configure
	style build system.