zfs/ChangeLog

2010-05-21 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.9

	* : Build system improvements:
	- Added support for the 'make -s' silent build option.
	- Allow spl_config.h to be included by dependent packages.
	- Minor spec file updates.

	* AUTHORS, COPYING, DISCLAIMER, and INSTALL: Updated.

	* *.c, *.h, *.sh, AUTHORS, COPYING, DISCLAIMER, and INSTALL:
	Added standard header to source files which includes the copyright,
	license, and author information.  Additionally, updated the listed
	top level files to the latest versions.

	* module/spl/spl-debug.c: Debugging defaults adjusted.  The default
	log dump path is now /tmp/spl-log and panic on SBUG has been disabled.

	* include/sys/processor.h, include/sys/systm.h, include/sys/types.h:
	Added 3 missing typedefs processorid_t, pc_t, and index_t.

	* include/sys/console.h: Added support for console_* functions().

	* module/spl/spl-time.c: Updated gethrtime() to use the function
	do_posix_clock_monotonic_gettime() as described in the comment.

	* module/spl/spl-condvar.c: Added cv_wait_interruptible() function
	as an extension to the existing condition variable ABI to enable
	sleeping threads a way to cleanly handle signals in the kernel.

	* module/spl/spl-debug.c: Dump log from current process as required.

	* module/spl/spl-taskq.c: Assume TQ_SLEEP in taskq_dispatch() if
	the caller does not specify, this is the Solaris default.

	* module/spl/spl-vnode.c: Extend the vn_rdwr() implementation to
	correctly handle the FAPPEND option.

	* module/spl/spl-generic.c, module/spl/spl-vnode.c: Update
	vn_set_pwd() to allow a kernal address as filename.  This turns
	out to be critical because spl_setup()->The vn_set_pwd("/") which
	is called at module load time was failing with -EFAULT.

	* include/sys/rwlock.h: Disable rw_tryupgrade() for kernels built
	without CONFIG_RWSEM_GENERIC_SPINLOCK defined.  The existing
	implementation is not safe in this case and needs to be replaced
	with a correct native per-arch implementation.

	* module/spl/spl-kmem.c: Reduce maximum kmem based slab size.
	Allowing MAX_ORDER-1 sized memory allocations while the system
	is low on memory has been observed to result in deadlocks.  Callers
	should not be using the slab in this way but we should still handle
	the case more cleanly.

	* module/spl/spl-kmem.c: Remove kmem_set_warning() interface and
	replace it with KM_NODEBUG flag which can be specific per allocation.

	* module/splat/splat-kmem.c: Tweaked what the idea of a large object
	is for the kmem:slab_large regression tests because failures were
	observed for very large kmem objects in newer kernels.

	* include/sys/rwlock.h, module/splat/splat-rwlock.c: The rwlock
	implementation was simplified because failures were being observed
	when using the non-generic implementation.  This change leverages
	the rwsem_is_locked() function instead of directly consulting the
	rwsem internals which differ per-arch and per-kernel-version.

2010-03-11 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.8

	* : Build system improvements:
	- Remove Module.markers and Module.symver{s} in clean target.
	- Improved kernel source detection when none specified.
	- Fix RPM definitions for the unknown distro/installation.

	* config/spl-build.m4: Linux 2.6.32 compat, SPL_AC_5ARGS_PROC_HANDLER
	  macro added to handle updated proc_handler () API.

	* module/spl/spl-err.c: Fix panic() string, which was being used as a
	  format string, instead of an already-formatted string.

	* /module/spl/spl-taskq.c: Optimize lowest outstanding taskqid
	  calculation in taskq_lowest_id().  The motivation for this change
	  was that I was observing as much as 10% of the total CPU time go
	  to waiting on the tq->tq_lock when the pending list was long.

	* module/spl/spl-kmem.c: Strip __GFP_ZERO from kmalloc it is not
	  available for older kernels.

	* module/spl/spl-proc.c: Add skc_flags and full header to
	  /proc/spl/kmem/slab 
	
	* module/spl/spl-generic.c: Correctly handle division on 32-bit RHEL5
	  systems by returning dividend.

	* include/sys/rwlock.h: When using x86 specific rwsem correctly
	  intepret rwsem->count.  Additionally check for changed guard macro
	  in 2.6.28+ for rwsem implementation

	* module/splat/splat-vnode.c, module/splat/splat-kmem.c,
	  module/splat/splat-taskq.c: Several new tests were added to the
	  test suite and various bug fixes.

	* include/asm/atomic_compat.h: Atomic64 compatibility for 32-bit
	  systems without kernel support.

	* .gitignore: Added .gitignore files.

2009-11-20 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.7

	* config/spl-build.m4: Linux 2.6.31 compat, SPL_AC_2ARGS_SET_FS_PWD
	macro updated to explicitly include linux/fs_struct.h which was
	dropped from linux/sched.h.

	* include/linux/mm_compat.h: Linux 2.6.31 compat, use the macros
	min_wmark_pages, low_wmark_pages, and high_wmark_pages which were
	introduced.  For older kernels a compability macro is used.

	* include/sys/kmem.h: Linux 2.6.31 compat, the __GFP_NOFAIL flag
	should no longer be used and it may disappear from the kernel at any
	time.  To handle this I have simply added *_nofail wrappers in the
	kmem implementation which perform the retry for non-atomic allocations.

	* module/spl/spl-kmem.c: Linux 2.6.31 compat, kmem cache alignment
	fixes and cleanup.  Always perform allocations for the kmem cache
	using __get_free_pages() or __vmalloc() to ensure the returned
	memory is page aligned.  Also introduce helper functions which use
	P2ROUNDUP_TYPE instead of P2ROUNDUP force all types to be explicit.

	* include/sys/mutex.h: Add mutex_enter_nested() as wrapper for
	mutex_lock_nested() to permit integration with the lock checker.

	* include/sys/mutex.h: Always use the generic mutex_destroy().

	* Makefile.am: Ensure *.order and *.markers build products are
	removed by distclean rule.

2009-11-02 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.6

	* config/spl-build.m4: Cleanup --enable-debug-* configure options.
	--enable-debug=<default no>  generic debug support.
	--enable-debug-kmem=<default yes> basic kmem and slab accounting.
	--enable-debug-kmem-tracking=<default no> detailed kmem tracking.
	--enable-debug-kstat removed option support always enabled.
	--enable-debug-callb removed option which never did anything.

	* module/spl/spl-atomic.c: Reimplemented atomic functions by
	layering them on top of the Linux atomic functions.  This improves
	performance by removing the need for a global spinlock.

	* module/spl/spl-debug.c: Rebase cmn_err on vcmn_err.  Handle the
	case where the message contains a leading ! which means only send
	it to syslog.  And suppress warnings for messages which do not end
	in a '\n'.

	* module/splat/splat-ctl.c: Update to use kobject_set_name() for
	increased portability.

	* module/spl/spl-generic.c: Set cwd to '/' for the task during
	module load for SPL dependent modules.  Under Solaris this is
	the expected behavior, on a Linux system your cwd remains set
	to whatever the tasks cwd was when loading a module.

	* module/spl/spl-mutex.c: Reimplemented mutexs for improved
	performance and cleaner integration with the Linux kernels built
	in lock analyzer.  As of 2.6.29 based kernels adaptive mutexs
	are supported, for these newer kernels task_curr() does not need
	to be exported.  Finally, DEBUG_MUTEX support was dropped in
	favor of more detailed kernel profiling which is now available.

	* module/spl/spl-rwlock.c: Reimplemented rwlocks for improved
	performance and cleaner integration with the Linux kernels built
	in lock analyzer.  Additionally, the rwlock regression tests were
	improved to help validate correctness.

	* spl-modules.spec.in: Various spec file tweaks for the supported
	distros: RHEL5, RHEL6, SLES10, SLES11, Chaos4, Fedora 11.

2009-08-04 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.5

	* FC11 and SLES11 support: This includes all compatibility changes
	to support 2.6.29 based kernels and the required build system
	improvements.
	* module/spl/spl-module.c: Register a basic compat ioctl handler
	for 32-bit user vs 64-bit kernel compatibility.  This is the default
	build environment for all 64-bit SLES systems.
	* config/spl-build.m4: Check arch/default path when detecting kernel
	objects under SLES.  We still preferentially use arch/arch if
	available but if that fails it is acceptable to use default.
	* module/spl/spl-vnode.: Use HAVE_PATH_IN_NAMEIDATA compat macros
	for maximum kernel compatibility.
	* config/spl-build.m4: Remove LINUXINCLUDE from autoconf wrapper.
	This breaks the 2.6.28+ kernels build system, all kernel build systems
	at least post 2.6.16 will set this properly so we should not.
	* include/sys/vmsystm.h, module/spl/spl-kmem.c: Perferentially use the
	global_page_state() API when your kernel supports the required enums.
	* include/sys/debug.h: Add ASSERTV macro to simplify removing
	variables (the V in ASSERTV) which are only used in ASSERT().
	* include/sys/debug.h: Disable stack overflow checking by default
	when build with --enable-debug, modern kernels now provide this.
	* patches/fc11-spl-export-symbols.patch: Recommended missing symbols
	patch for FC11.  This is not required for correct functionality but
	it is recommended for individuals who are already patching the kernel.

	* Additional Solaris API emulation:
	* include/sys/taskq.h: Add basic taskq support for the flag
	TASKQ_THREADS_CPU_PCT which is used to scale the number of threads
	based on the number of online CPUs.
	* include/sys/file.hi, module/spl/spl-generic.c: Add support for
	fake ioctls which originate from the kernel instead of user space.
	* include/sys/acl.h: Add ACE_ALL_PERMS ACL definition.
	* include/sys/cred.h, module/splat/splat-cred.c: Add basic credential
	support and splat regression tests.

	* Bug fixes:
	* include/sys/isa_defs.h: Add more endianess paranoia.
	* module/spl/spl-time.c: Integer overflow after ~164 days.
	* include/sys/debug.h: NULL dereference by tcd_for_each().
	* module/splat/splat-kmem.c: Allow kmem or vmem based slabs for
	slab_lock and slab_overcommit tests.  This may still be an issue on
	32-bit systems due to the small virtual address space.
	* module/spl/spl-module.c: Positive Solaris ioctl return codes are
	need to be negated for use by libc to ensure errno is set correctly.

2009-07-02 Brian Behlendorf <behlendorf1@llnl.gov>

	* : Tag spl-0.4.4

	* : Generic distro friendly build system / packaging improvements
	for rpm based distros including CHAOS, RHEL, Fedora, and SLES.

	spl-<version>.src.rpm
	- Fully rebuildable source rpm for utils.
	spl-modules-<version>.src.rpm
	- Fully rebuildable source rpm for kernel modules.

	spl-<version>.<arch>.rpm
	- Binary rpm for utils.  The utils in this package are compatible
	with all spl-module rpms of the same version.
	
	spl-modules-<verion>-<kernel>.arch.rpm
	- Binary rpm containing the kernel modules for a specific kernel build.
	  The package name contains the kernel version and you should have one
	  of these packages installed to match every kernel on your system.
	spl-modules-devel-<verion>-<kernel>.arch.rpm
	- Binary rpm containing development header and module symbols needed
	  for building additional kernel modules which are dependent on the
	  spl module.

	* : 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.