[userspace-rcu.git] / ChangeLog

2012-09-11 Userspace RCU 0.6.8
	* Fix: call_rcu list corruption on teardown

2011-12-12 Userspace RCU 0.6.7
	* Add compat file for test urcu wfs
	* Add missing compat file for wfq test
	* hlist.h: Add missing stddef.h include for NULL
	* call_rcu: Add missing call_rcu_before_fork and
	  call_rcu_after_fork_parent declarations
	* Describe autotools/libtool/automake version dependency
	* Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
	* Support older autotools
	* Apply autoupdate to configure.ac
	* Fix build for amd64 environment (for FreeBSD 8.2)
	* Add missing rcu_dereference_sym_bp
	* Install test scripts in the dist tarball

2011-11-03 Userspace RCU 0.6.6
	* qsbr vs call_rcu : remove exit assertion
	* Rename likely/unlikely to caa_likely/caa_unlikely
	* Reinsert missing test_urcu_*.c files (missing in rename)
	* rename test_qsbr to test_urcu_qsbr
	* urcu-pointer: fix rcu_set_pointer unset return value
	* Enhance API.txt documentation, add to Makefile as EXTRA_DIST

2011-09-29 Userspace RCU 0.6.5
	* call_rcu: Document call_rcu requirements
	* call_rcu: fix error handling of malloc error
	* urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
	* urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
	* urcu,call_rcu: avoid create call_rcu_data for child when unneed
	* urcu,defer_rcu: Make defer_rcu encoding more compact for marker
	* urcu_defer: Use cancellation flag instead of pthread_cancel()
	* urcu,call_rcu: protects call_rcu_data_list when remove node
	* Create default call rcu data upon per-cpu call-rcu teardown
	* powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
	* cmm: provide lightweight smp_rmb/smp_wmb on PPC
	* atomic: provide seq_cst semantics on powerpc
	* avoid leaking crdp for failed path
	* Return -EEXIST when the old cpu call_rcu_data has not been removed
	* protect writing to per_cpu_call_rcu_data[*]
	* wake up default call_rcu thread after we move the leftover callbacks
	* avoid memory leak in call_rcu_data_free()
	* urcu call_rcu: fix use after free()
	* use get_cpu_call_rcu_data() for get_call_rcu_data()
	* init maxcpus before use
	* call_rcu implementation: add missing static
	* Document QSBR interaction with mutexes
	* urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
	* urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
	* Pair all_cpu call_rcu create with free
	* QSBR: add missing wakeups in synchronize_rcu code
	* cmm: do not generate code for smp_rmb/smp_wmb on x86_64
	* cmm: let per-arch files provide cmm_smp_* barriers
	* Optimize caa_get_cycles() for PowerPC64
	* lfq/lfs tests: use call_rcu
	* list: Add cds_list_first_entry
	* rculfstack/queue: define _LGPL_SOURCE around static header include
	* Add __rcu annotation (unimplemented)
	* Fix incorrect fsf address in header files
	* wfstack: push returns prior stack emptiness state
	* Make lf stack push return if the stack was empty
	* Document caa_container_of
	* urcu-bp: do not call munmap for NULL registry at exit
	* urcu libraries can directly use the _LGPL_SOURCE wfqueue
	* rculfstack: document "push"
	* Add runall.sh to tarball
	* Fix build order of liburcu-cds-common
	* Fix missing check for SYS_membarrier in map header
	* urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
	* api: reimplement BUILD_BUG_ON in compiler.h
	* test api cleanup: remove unused primitives
	* put thread offline while waiting for the init flag
	* urcu: move private definitions to .c file
	* urcu-bp: move private definitions to .c file
	* urcu-qsbr: move private definitions to .c file
	* rcutorture: fix rcutorture-qsbr
	* wfqueue: fix type-incorrect assignment
	* Fix tests Makefile EXTRA_DIST to use api.h
	* Fix choice of default flavour in urcu/map/urcu.h
	* api: remove list/hlist
	* api: remove arch-specific files
	* api: make api_gcc.h a superset of the other headers
	* tests api: remove atomics
	* put thread offline while waiting for the init flag
	* urcu: move private definitions to .c file
	* urcu-bp: move private definitions to .c file
	* urcu-qsbr: move private definitions to .c file
	* rcutorture: fix rcutorture-qsbr
	* wfqueue: fix type-incorrect assignment
	* Use caa_ prefix for min() and max()

2011-07-21 Userspace RCU 0.6.4
	* uatomic: Fix ARM build errors in uatomic.
	* urcu tests: hold mutex across use of custom allocator.
	* Portability fixes to support FreeBSD 8.2.

2011-06-27 Userspace RCU 0.6.3
	* uatomic: Fix i386 compatibility build errors in uatomic.

2011-06-13 Userspace RCU 0.6.2
	* Fix build on powerpc.

2011-06-13 Userspace RCU 0.6.1
	* Add missing headers into release tarball:
	    urcu-call-rcu-impl.h and urcu-defer-impl.h

2011-06-10 Userspace RCU 0.6.0
	* Added call_rcu() support, graciously contributed by Paul E. McKenney.
	* Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
	  into a single .so: liburcu-cds.so to have a single header/shared
	  object holding all concurrency-aware data containers. It provides
	  support for RCU lists, queues and stacks at the moment.
	* liburcu 0.6.0 now allows linking a single application with multiple
	  flavors of RCU. This required a library API change which is
	  incompatible with older 0.5.x liburcu. The .so version number
	  is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
	* Added "atfork" handling API, documented in README. Only useful for
	  processes using fork() without following exec().
	* Renaming the following files, keeping the old files (producing a
	  compiler warning):
	    urcu/uatomic_arch.h -> urcu/uatomic.h
	    urcu/urcu-futex.h -> urcu/futex.h
	    urcu/urcu_ref.h -> urcu/ref.h

2011-03-04 Userspace RCU 0.5.4
	 *  urcu-bp: Update fork() handling

	    Introduce

	    extern void rcu_bp_before_fork(void);
	    extern void rcu_bp_after_fork_parent(void);
	    extern void rcu_bp_after_fork_child(void);

	    to handle fork gracefully. These disable signals and hold
	    the registry mutex across forks. (this flavor of the liburcu
	    library ("bp" for "bulletproof") is mainly used by UST, the
	    user-space tracer).

2011-03-03 Userspace RCU 0.5.3
	* Add support for older ARM single-CPU architecturess (pre-ARMv7)
	  (thanks to Jason Wessel from WindRiver).
	* Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
	* Remove leftover list_t type from urcu/list.h (namespace cleanup).
	* urcu_defer: handle malloc error value.
	* Update README file to describe urcu interaction with fork() when not
	* followed
	  by an exec() system call.

2010-11-18 Userspace RCU 0.5.2
	* Fix renaming error introduced in 0.5.0.

2010-11-18 Userspace RCU 0.5.1
	* Fix renaming error introduced in 0.5.0. (incomplete fix)

2010-11-18 Userspace RCU 0.5.0
	* Version 0.5.0 changes the API presented by memory model,
	  architecture abstraction and data structure primitives in
	  headers. The prefixes are, respectively:
	    - cmm_ : Concurrent Memory Model
	    - caa_ : Concurrent Architecture Abstraction
	    - cds_ : Concurrent Data Structures

2010-03-04 Userspace RCU 0.4.2
	* Add generic uatomic ops support.
	* Bugfix in urcu-bp. (rare garbage collection bug occurring in
	  multithreaded environment). Only affects urcu-bp users (UST).

2010-02-12 Userspace RCU 0.4.1
	* s390: compilation fix.

2010-01-30 Userspace RCU 0.4.0
	* API change: SIGURCU -> SIGRCU
	* API changes: standardize on rcu_ prefix.
	* API change: urcu_init -> rcu_init.
	* urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
	  CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
	  ((moving from URCU -> RCU).
	* library names changes: liburcu becomes the "default" version, using
	  sys_membarrier() when available, and using liburcu-mb as a
	  fallback.
	* The signal-based liburcu is renamed from liburcu to
	  liburcu-signal. People previously using the signal-based
	  "liburcu" will automatically be moved to the "default" liburcu
	  version.

2009-11-16 Userspace RCU 0.3.1
	* Add support for sparcv9 32-bit build.
	* Update build system to use --host instead of --target.

2009-11-03 Userspace RCU 0.3.0
	* API change for the "deferred work" interface.

2009-10-14 Userspace RCU 0.2.3
	* Move to autotools.
	* Automated architecture detection, with i386 fallback.
	* Detect if NR_futex is on the system, fallback on portable
	  alternatives.
	* Add configure mode for UP-only systems.

2009-10-02 Userspace RCU 0.2.2
	* Phases out rcu_publish_content() api.
	* Adds type checking to urcu-pointer.h pointer exchange primitives.

2009-10-02 Userspace RCU 0.2.1
	* small header dependency fix for rculist.h.
	* new "liburcu-bp.so" : "Bulletproof RCU", made especially for
	  the UST userspace tracer. It's a library that sacrifices a bit
	  of read-side performance for automatically monitoring thread
	  creation/removal. See README for details.

2009-10-01 Userspace RCU 0.2
	* Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
	  rcu_set_pointer.

2009-09-29 Userspace RCU 0.1
	* Initial release.
Commit	Line	Data
2927c34e MD	1	2012-09-11 Userspace RCU 0.6.8
	2	* Fix: call_rcu list corruption on teardown
	3
c2f15ecd MD	4	2011-12-12 Userspace RCU 0.6.7
	5	* Add compat file for test urcu wfs
	6	* Add missing compat file for wfq test
	7	* hlist.h: Add missing stddef.h include for NULL
	8	* call_rcu: Add missing call_rcu_before_fork and
	9	call_rcu_after_fork_parent declarations
	10	* Describe autotools/libtool/automake version dependency
	11	* Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
	12	* Support older autotools
	13	* Apply autoupdate to configure.ac
	14	* Fix build for amd64 environment (for FreeBSD 8.2)
	15	* Add missing rcu_dereference_sym_bp
	16	* Install test scripts in the dist tarball
	17
530aab93 MD	18	2011-11-03 Userspace RCU 0.6.6
	19	* qsbr vs call_rcu : remove exit assertion
	20	* Rename likely/unlikely to caa_likely/caa_unlikely
	21	* Reinsert missing test_urcu_*.c files (missing in rename)
	22	* rename test_qsbr to test_urcu_qsbr
	23	* urcu-pointer: fix rcu_set_pointer unset return value
	24	* Enhance API.txt documentation, add to Makefile as EXTRA_DIST
	25
49472b9b MD	26	2011-09-29 Userspace RCU 0.6.5
	27	* call_rcu: Document call_rcu requirements
	28	* call_rcu: fix error handling of malloc error
	29	* urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
	30	* urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
	31	* urcu,call_rcu: avoid create call_rcu_data for child when unneed
	32	* urcu,defer_rcu: Make defer_rcu encoding more compact for marker
	33	* urcu_defer: Use cancellation flag instead of pthread_cancel()
	34	* urcu,call_rcu: protects call_rcu_data_list when remove node
	35	* Create default call rcu data upon per-cpu call-rcu teardown
	36	* powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
	37	* cmm: provide lightweight smp_rmb/smp_wmb on PPC
	38	* atomic: provide seq_cst semantics on powerpc
	39	* avoid leaking crdp for failed path
	40	* Return -EEXIST when the old cpu call_rcu_data has not been removed
	41	* protect writing to per_cpu_call_rcu_data[*]
	42	* wake up default call_rcu thread after we move the leftover callbacks
	43	* avoid memory leak in call_rcu_data_free()
	44	* urcu call_rcu: fix use after free()
	45	* use get_cpu_call_rcu_data() for get_call_rcu_data()
	46	* init maxcpus before use
	47	* call_rcu implementation: add missing static
	48	* Document QSBR interaction with mutexes
	49	* urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
	50	* urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
	51	* Pair all_cpu call_rcu create with free
	52	* QSBR: add missing wakeups in synchronize_rcu code
	53	* cmm: do not generate code for smp_rmb/smp_wmb on x86_64
	54	* cmm: let per-arch files provide cmm_smp_* barriers
	55	* Optimize caa_get_cycles() for PowerPC64
	56	* lfq/lfs tests: use call_rcu
	57	* list: Add cds_list_first_entry
	58	* rculfstack/queue: define _LGPL_SOURCE around static header include
	59	* Add __rcu annotation (unimplemented)
	60	* Fix incorrect fsf address in header files
	61	* wfstack: push returns prior stack emptiness state
	62	* Make lf stack push return if the stack was empty
	63	* Document caa_container_of
	64	* urcu-bp: do not call munmap for NULL registry at exit
	65	* urcu libraries can directly use the _LGPL_SOURCE wfqueue
	66	* rculfstack: document "push"
	67	* Add runall.sh to tarball
	68	* Fix build order of liburcu-cds-common
	69	* Fix missing check for SYS_membarrier in map header
	70	* urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
	71	* api: reimplement BUILD_BUG_ON in compiler.h
	72	* test api cleanup: remove unused primitives
	73	* put thread offline while waiting for the init flag
	74	* urcu: move private definitions to .c file
	75	* urcu-bp: move private definitions to .c file
	76	* urcu-qsbr: move private definitions to .c file
	77	* rcutorture: fix rcutorture-qsbr
	78	* wfqueue: fix type-incorrect assignment
	79	* Fix tests Makefile EXTRA_DIST to use api.h
	80	* Fix choice of default flavour in urcu/map/urcu.h
	81	* api: remove list/hlist
	82	* api: remove arch-specific files
	83	* api: make api_gcc.h a superset of the other headers
	84	* tests api: remove atomics
	85	* put thread offline while waiting for the init flag
	86	* urcu: move private definitions to .c file
	87	* urcu-bp: move private definitions to .c file
	88	* urcu-qsbr: move private definitions to .c file
	89	* rcutorture: fix rcutorture-qsbr
90	* wfqueue: fix type-incorrect assignment
91	* Use caa_ prefix for min() and max()
92
5d80fb65 MD	93	2011-07-21 Userspace RCU 0.6.4
	94	* uatomic: Fix ARM build errors in uatomic.
	95	* urcu tests: hold mutex across use of custom allocator.
	96	* Portability fixes to support FreeBSD 8.2.
	97
aa120cd0 MD	98	2011-06-27 Userspace RCU 0.6.3
	99	* uatomic: Fix i386 compatibility build errors in uatomic.
	100
	101	2011-06-13 Userspace RCU 0.6.2
	102	* Fix build on powerpc.
	103
	104	2011-06-13 Userspace RCU 0.6.1
	105	* Add missing headers into release tarball:
	106	urcu-call-rcu-impl.h and urcu-defer-impl.h
	107
	108	2011-06-10 Userspace RCU 0.6.0
	109	* Added call_rcu() support, graciously contributed by Paul E. McKenney.
	110	* Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
	111	into a single .so: liburcu-cds.so to have a single header/shared
	112	object holding all concurrency-aware data containers. It provides
	113	support for RCU lists, queues and stacks at the moment.
	114	* liburcu 0.6.0 now allows linking a single application with multiple
	115	flavors of RCU. This required a library API change which is
	116	incompatible with older 0.5.x liburcu. The .so version number
	117	is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
	118	* Added "atfork" handling API, documented in README. Only useful for
	119	processes using fork() without following exec().
	120	* Renaming the following files, keeping the old files (producing a
	121	compiler warning):
	122	urcu/uatomic_arch.h -> urcu/uatomic.h
	123	urcu/urcu-futex.h -> urcu/futex.h
	124	urcu/urcu_ref.h -> urcu/ref.h
	125
	126	2011-03-04 Userspace RCU 0.5.4
	127	* urcu-bp: Update fork() handling
	128
	129	Introduce
	130
	131	extern void rcu_bp_before_fork(void);
	132	extern void rcu_bp_after_fork_parent(void);
	133	extern void rcu_bp_after_fork_child(void);
	134
	135	to handle fork gracefully. These disable signals and hold
	136	the registry mutex across forks. (this flavor of the liburcu
	137	library ("bp" for "bulletproof") is mainly used by UST, the
	138	user-space tracer).
	139
	140	2011-03-03 Userspace RCU 0.5.3
	141	* Add support for older ARM single-CPU architecturess (pre-ARMv7)
	142	(thanks to Jason Wessel from WindRiver).
	143	* Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
	144	* Remove leftover list_t type from urcu/list.h (namespace cleanup).
	145	* urcu_defer: handle malloc error value.
	146	* Update README file to describe urcu interaction with fork() when not
	147	* followed
	148	by an exec() system call.
	149
	150	2010-11-18 Userspace RCU 0.5.2
	151	* Fix renaming error introduced in 0.5.0.
	152
	153	2010-11-18 Userspace RCU 0.5.1
	154	* Fix renaming error introduced in 0.5.0. (incomplete fix)
	155
	156	2010-11-18 Userspace RCU 0.5.0
	157	* Version 0.5.0 changes the API presented by memory model,
	158	architecture abstraction and data structure primitives in
	159	headers. The prefixes are, respectively:
	160	- cmm_ : Concurrent Memory Model
	161	- caa_ : Concurrent Architecture Abstraction
162	- cds_ : Concurrent Data Structures
163
164	2010-03-04 Userspace RCU 0.4.2
165	* Add generic uatomic ops support.
166	* Bugfix in urcu-bp. (rare garbage collection bug occurring in
167	multithreaded environment). Only affects urcu-bp users (UST).
168
169	2010-02-12 Userspace RCU 0.4.1
170	* s390: compilation fix.
171
172	2010-01-30 Userspace RCU 0.4.0
173	* API change: SIGURCU -> SIGRCU
174	* API changes: standardize on rcu_ prefix.
175	* API change: urcu_init -> rcu_init.
176	* urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
177	CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
178	((moving from URCU -> RCU).
179	* library names changes: liburcu becomes the "default" version, using
180	sys_membarrier() when available, and using liburcu-mb as a
181	fallback.
182	* The signal-based liburcu is renamed from liburcu to
183	liburcu-signal. People previously using the signal-based
184	"liburcu" will automatically be moved to the "default" liburcu
185	version.
186
187	2009-11-16 Userspace RCU 0.3.1
188	* Add support for sparcv9 32-bit build.
189	* Update build system to use --host instead of --target.
190
191	2009-11-03 Userspace RCU 0.3.0
192	* API change for the "deferred work" interface.
193
194	2009-10-14 Userspace RCU 0.2.3
195	* Move to autotools.
196	* Automated architecture detection, with i386 fallback.
197	* Detect if NR_futex is on the system, fallback on portable
198	alternatives.
199	* Add configure mode for UP-only systems.
200
201	2009-10-02 Userspace RCU 0.2.2
202	* Phases out rcu_publish_content() api.
203	* Adds type checking to urcu-pointer.h pointer exchange primitives.
204
205	2009-10-02 Userspace RCU 0.2.1
206	* small header dependency fix for rculist.h.
207	* new "liburcu-bp.so" : "Bulletproof RCU", made especially for
208	the UST userspace tracer. It's a library that sacrifices a bit
209	of read-side performance for automatically monitoring thread
210	creation/removal. See README for details.
211
212	2009-10-01 Userspace RCU 0.2
213	* Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
214	rcu_set_pointer.
215
216	2009-09-29 Userspace RCU 0.1
217	* Initial release.