ChangeLog

   1 2015-10-16 Userspace RCU 0.7.16
   2         * Fix: format string signedness
   3         * Use gcc atomics on aarch64/powerpc64le
   4         * Fix: compat_futex: uninitialized ret variable
   5         * Fix: compat_futex_noasync: don't override return value
   6         * Fix: stable-0.7 branch does not have syscall-compat.h
   7         * Fix: dynamic fallback to compat futex on sys_futex ENOSYS
   8
   9 2015-09-09 Userspace RCU 0.7.15
  10         * Disable sys_membarrier
  11         * uatomic: Specify complete types for atomic function calls
  12         * Fix: handle sys_futex() FUTEX_WAIT interrupted by signal
  13         * Fix: compat_futex.c: *uaddr should be read as volatile
  14         * Fix: call_rcu_thread() affinity failure
  15         * urcu: fix deprecation warning with new glibc
  16
  17 2015-04-28 Userspace RCU 0.7.14
  18         * Fix: call rcu should call internal RCU API
  19         * Fix: deadlock when thread join is issued in read-side C.S.
  20         * Fix: rename RCU_DEBUG to DEBUG_RCU in urcu-qsbr.h
  21         * Mark braced-groups within expressions with __extension__
  22         * Fix: compat_futex_noasync race condition
  23         * Fix: documentation: urcu-pointer.h: s/rcu_dereference_pointer/rcu_dereference/
  24         * Fix: silence gcc -Wextra warning
  25
  26 2014-10-21 Userspace RCU 0.7.13
  27         * rculfhash: remove duplicated code
  28         * rculfhash: handle pthread_create failures
  29         * rculfhash: fall back to single-threaded resize on calloc failure
  30         * x86: drop extra semi-colon in caa_cpu_relax
  31         * call_rcu threads should clear their PAUSED flag when they unpause
  32         * Fix: bring back dummy rcu_bp_exit symbol
  33
  34 2014-03-08 Userspace RCU 0.7.12
  35         * Fix: move wait loop increment before first conditional block
  36
  37 2014-03-01 Userspace RCU 0.7.11
  38         * Fix: high cpu usage in synchronize_rcu with long RCU read-side C.S.
  39
  40 2014-02-28 Userspace RCU 0.7.10
  41         * Fix: urcu-bp interaction with threads vs constructors/destructors
  42         * Fix undefined NULL pointer arithmetic
  43         * Blacklist ARM gcc 4.8.0, 4.8.1, 4.8.2
  44         * rculfhash: document max_nr_buckets = 0
  45
  46 2013-11-12 Userspace RCU 0.7.9
  47         * tls-compat: fix comment typo
  48         * Keep ABI compatible with already compiled LGPL applications
  49         * Fix: tls-compat multi-lib conflict
  50         * gcc warning fixes: -Wsign-compare and -Wextra
  51         * Fix: urcu-qsbr: reversed logic on RCU_DEBUG
  52         * Fix: urcu-bp segfault in glibc pthread_kill()
  53         * Fix urcu-bp: don't move registry
  54         * Fix: compat futex duplicated lock and completion
  55         * Fix: i386 compat code duplicated mutex instances
  56         * Fix: urcu-bp: Bulletproof RCU arena resize bug
  57         * Fix: test_mutex.c uninitialized mutex
  58
  59 2013-09-06 Userspace RCU 0.7.8
  60         * Fix: hash table growth (for small tables) should be limited
  61         * Document build work-around on MacOS X
  62         * Fix tests: use of uninitialized variables
  63         * tests: add missing unsigned long casts to pthread_self()
  64
  65 2013-06-18 Userspace RCU 0.7.7
  66         * rculfhash: document destroy context limitation
  67         * Fix: Use a filled signal mask to disable all signals
  68         * Document: rculfhash destroy and resize side-effect in 0.7
  69         * Add "sparc" host cpu to configure.ac
  70         * Fix: tests/api.h use cpuset.h
  71         * Fix hurd-i386: move cpuset tests outside of sched_setaffinity conditional
  72         * Fix tests: finer-grained use of CPU_SET, CPU_ZERO and cpu_set_t
  73         * Test for CPU_SET
  74         * Fix build on architectures with HAVE_SCHED_GETCPU but without HAVE_SYSCONF
  75         * README: document that Clang 3.0 (based on LLVM 3.0) is supported
  76         * clang: silence "unused expression result" warning
  77         * rculfhash: add assertions on node alignment
  78         * uatomic: style fix
  79
  80 2013-01-09 Userspace RCU 0.7.6
  81         * Discourage use of pthread_atfork() for call_rcu handlers
  82         * Fix call_rcu fork handling
  83         * test: fork handling
  84         * Fix TLS detection: test with linker, add --disable-compiler-tls
  85         * Cleanup: cast pthread_self() return value to unsigned long
  86         * Fallback mechanism not working on platform where TLS is unsupported
  87
  88 2012-10-12 Userspace RCU 0.7.5
  89         * 19cf3ae Fix: call_rcu list corruption on teardown
  90         * Ensure that read-side functions meet 10-line LGPL criterion
  91         * tls-compat.h: document sigaltstack(2) limitation
  92         * urcu: add notice to URCU_TLS() for it is not strictly async-signal-safe
  93         * Document sigaltstack(2) limitation
  94         * Documentation: update LICENSE file
  95
  96 2012-08-27 Userspace RCU 0.7.4
  97         * rculfhash API documentation: document destroy RCU read-lock constraint
  98         * Fix: rculfhash should be offline while waiting for resize to complete
  99         * Add missing entry to gitignore
 100         * urcu: move busy-wait code and name it ___cds_wfq_node_sync_next()
 101         * urcu: fix compat_futex_noasync()
 102         * urcu: add hint to DEFINE_URCU_TLS() for compound types
 103         * Fix: CAA_BUILD_BUG_ON should refer to CAA_BUILD_BUG_ON_ZERO
 104         * Add MIPS support
 105         * Compatibility: remove bash-ismsm from test scripts
 106         * Fix inappropriate lib behavior: don't call exit()
 107         * Fix: re-enable compatibility with autoconf < 2.64
 108         * Fix c99 compatibility: use __asm__ and __volatile__ in public headers
 109         * Fix c99 compatibility: use __typeof__ instead of typeof in public headers
 110         * warning fix: tests urcutorture for NetBSD 5
 111
 112 2012-06-01 Userspace RCU 0.7.3
 113         * Fix tests: make dist lib dependency
 114         * Update README for OS supported, tests dependency
 115         * Add CodingStyle to tarball
 116         * Add coding style document
 117         * Test fix: test_perthreadlock uninitialized mutex
 118         * tests: support FreeBSD short "time" args
 119         * freebsd 8.2 fix: define MAP_ANONYMOUS for compatibility
 120
 121 2012-05-24 Userspace RCU 0.7.2
 122         * Fix library compatibility
 123
 124 2012-05-24 Userspace RCU 0.7.1
 125         * fix: uatomic_set return value compile fix for non-x86 arch.
 126
 127 2012-05-21 Userspace RCU 0.7.0
 128         * Cleanup: header comments coding style
 129         * Document uatomic operations
 130         * Update return value of "set" operations
 131         * Fix mremap wrapper for NetBSD 5
 132         * Use urcu/tls-compat.h
 133         * Implement urcu/tls-compat.h
 134         * Add TLS detection m4 macro
 135         * document concurrent data structures
 136         * documentation: refer to rcu-api.txt
 137         * Move API.txt to doc/rcu-api.txt, install in system doc/
 138         * rculfhash: document implied memory barriers
 139         * rculfhash: Ensure future-proof memory barrier semantic consistency
 140         * API cleanup: use "uatomic_*" in cmm_smp_mb__ API
 141         * uatomic: add memory barrier API for and/or/add/sub/inc/sub
 142         * rculfhash: add runhash.sh test script
 143         * rculfhash tests: add missing check
 144         * rculfhash: fix: race between replace and del operations
 145         * rculfhash: replace unneeded rcu_dereference by CMM_LOAD_SHARED
 146         * rculfhash: use do {} while (0) for dbg_printf()
 147         * rculfhash: cleanup typo
 148         * rculfhash: update API comments
 149         * rculfhash: update comments in implementation
 150         * rculfhash tests: add long hash chains tests
 151         * rculfhash tests: add uniqueness test
 152         * rculfhash test: print test name
 153         * rculfhash: stress requirement in documentation
 154         * rculfhash: fix typo
 155         * rculfhash tests: use array of callbacks to modularize
 156         * rculfhash tests: modularize tests
 157         * rculfhash: document ordering guarantees
 158         * rculfhash: document linearizability guarantees
 159         * rculfhash: update removal comment
 160         * Add missing files to .gitignore
 161         * Fix out-of-tree build
 162         * rculfhash: check malloc NULL pointer
 163         * Fix uatomic sign cast
 164         * Remove unused jhash.h file
 165         * Fix: use known license text, fix incorrect FSF address
 166         * Fix: add missing sched.h include in rculfhash.c
 167         * Allow tests to run on architectures without per-cpu call_rcu support
 168         * Hash table test: FreeBSD compatibility fix
 169         * tests: define _GNU_SOURCE instead of __USE_GNU
 170         * RCU lock-free hash table: implement cds_lfht_is_node_deleted()
 171         * Define _GNU_SOURCE to access CPU_ZERO() macro in uClibc
 172         * Install ChangeLog and README into system's doc
 173         * Fix AC_LANG_SOURCE usage: only takes one parameter
 174         * Fix autoconf futex check
 175         * configure.ac: Use AC_LANG_SOURCE for if else macros
 176         * Refresh autoconf files
 177         * Update gitignore
 178         * rculfhash: add comment about hash seed randomness within test program
 179         * readme: state correct GCC dependency for ARM
 180         * rculfhash: remove an invocation of bit_reverse_ulong() when adding
 181         * rculfhash: remove unneeded conversion
 182         * rculfhash: remove unneeded clear_flag()
 183         * cds_lfht_replace: add checks for old/new node hash/value match
 184         * rculfhash: use node instead of iter argument for deletion
 185         * rculfhash: number of logically removed nodes should not appear in API
 186         * Document that flags could be represented on 2 bits
 187         * Add missing REMOVAL_OWNER_FLAG comment to cds_lfht_node comment
 188         * _cds_lfht_del is not used for buckets anymore, remove parameter
 189         * rculfhash: Relax atomicity guarantees required by removal operation
 190         * remove unneeded "return;"
 191         * simplify the deletion for bucket node
 192         * Remove unneeded code
 193         * Cleanup DEFINE_RCU_FLAVOR()
 194         * Add cds_lfht_ prefix to fls_ulong, get_count_order_ulong, get_count_order_u32
 195         * Merge RCU Lock-Free Resizable Hash Table
 196
 197 2011-12-12 Userspace RCU 0.6.7
 198         * Add compat file for test urcu wfs
 199         * Add missing compat file for wfq test
 200         * hlist.h: Add missing stddef.h include for NULL
 201         * call_rcu: Add missing call_rcu_before_fork and
 202           call_rcu_after_fork_parent declarations
 203         * Describe autotools/libtool/automake version dependency
 204         * Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
 205         * Support older autotools
 206         * Apply autoupdate to configure.ac
 207         * Fix build for amd64 environment (for FreeBSD 8.2)
 208         * Add missing rcu_dereference_sym_bp
 209         * Install test scripts in the dist tarball
 210
 211 2011-11-03 Userspace RCU 0.6.6
 212         * qsbr vs call_rcu : remove exit assertion
 213         * Rename likely/unlikely to caa_likely/caa_unlikely
 214         * Reinsert missing test_urcu_*.c files (missing in rename)
 215         * rename test_qsbr to test_urcu_qsbr
 216         * urcu-pointer: fix rcu_set_pointer unset return value
 217         * Enhance API.txt documentation, add to Makefile as EXTRA_DIST
 218
 219 2011-09-29 Userspace RCU 0.6.5
 220         * call_rcu: Document call_rcu requirements
 221         * call_rcu: fix error handling of malloc error
 222         * urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
 223         * urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
 224         * urcu,call_rcu: avoid create call_rcu_data for child when unneed
 225         * urcu,defer_rcu: Make defer_rcu encoding more compact for marker
 226         * urcu_defer: Use cancellation flag instead of pthread_cancel()
 227         * urcu,call_rcu: protects call_rcu_data_list when remove node
 228         * Create default call rcu data upon per-cpu call-rcu teardown
 229         * powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
 230         * cmm: provide lightweight smp_rmb/smp_wmb on PPC
 231         * atomic: provide seq_cst semantics on powerpc
 232         * avoid leaking crdp for failed path
 233         * Return -EEXIST when the old cpu call_rcu_data has not been removed
 234         * protect writing to per_cpu_call_rcu_data[*]
 235         * wake up default call_rcu thread after we move the leftover callbacks
 236         * avoid memory leak in call_rcu_data_free()
 237         * urcu call_rcu: fix use after free()
 238         * use get_cpu_call_rcu_data() for get_call_rcu_data()
 239         * init maxcpus before use
 240         * call_rcu implementation: add missing static
 241         * Document QSBR interaction with mutexes
 242         * urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
 243         * urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
 244         * Pair all_cpu call_rcu create with free
 245         * QSBR: add missing wakeups in synchronize_rcu code
 246         * cmm: do not generate code for smp_rmb/smp_wmb on x86_64
 247         * cmm: let per-arch files provide cmm_smp_* barriers
 248         * Optimize caa_get_cycles() for PowerPC64
 249         * lfq/lfs tests: use call_rcu
 250         * list: Add cds_list_first_entry
 251         * rculfstack/queue: define _LGPL_SOURCE around static header include
 252         * Add __rcu annotation (unimplemented)
 253         * Fix incorrect fsf address in header files
 254         * wfstack: push returns prior stack emptiness state
 255         * Make lf stack push return if the stack was empty
 256         * Document caa_container_of
 257         * urcu-bp: do not call munmap for NULL registry at exit
 258         * urcu libraries can directly use the _LGPL_SOURCE wfqueue
 259         * rculfstack: document "push"
 260         * Add runall.sh to tarball
 261         * Fix build order of liburcu-cds-common
 262         * Fix missing check for SYS_membarrier in map header
 263         * urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
 264         * api: reimplement BUILD_BUG_ON in compiler.h
 265         * test api cleanup: remove unused primitives
 266         * put thread offline while waiting for the init flag
 267         * urcu: move private definitions to .c file
 268         * urcu-bp: move private definitions to .c file
 269         * urcu-qsbr: move private definitions to .c file
 270         * rcutorture: fix rcutorture-qsbr
 271         * wfqueue: fix type-incorrect assignment
 272         * Fix tests Makefile EXTRA_DIST to use api.h
 273         * Fix choice of default flavour in urcu/map/urcu.h
 274         * api: remove list/hlist
 275         * api: remove arch-specific files
 276         * api: make api_gcc.h a superset of the other headers
 277         * tests api: remove atomics
 278         * put thread offline while waiting for the init flag
 279         * urcu: move private definitions to .c file
 280         * urcu-bp: move private definitions to .c file
 281         * urcu-qsbr: move private definitions to .c file
 282         * rcutorture: fix rcutorture-qsbr
 283         * wfqueue: fix type-incorrect assignment
 284         * Use caa_ prefix for min() and max()
 285
 286 2011-07-21 Userspace RCU 0.6.4
 287         * uatomic: Fix ARM build errors in uatomic.
 288         * urcu tests: hold mutex across use of custom allocator.
 289         * Portability fixes to support FreeBSD 8.2.
 290
 291 2011-06-27 Userspace RCU 0.6.3
 292         * uatomic: Fix i386 compatibility build errors in uatomic.
 293
 294 2011-06-13 Userspace RCU 0.6.2
 295         * Fix build on powerpc.
 296
 297 2011-06-13 Userspace RCU 0.6.1
 298         * Add missing headers into release tarball:
 299             urcu-call-rcu-impl.h and urcu-defer-impl.h
 300
 301 2011-06-10 Userspace RCU 0.6.0
 302         * Added call_rcu() support, graciously contributed by Paul E. McKenney.
 303         * Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
 304           into a single .so: liburcu-cds.so to have a single header/shared
 305           object holding all concurrency-aware data containers. It provides
 306           support for RCU lists, queues and stacks at the moment.
 307         * liburcu 0.6.0 now allows linking a single application with multiple
 308           flavors of RCU. This required a library API change which is
 309           incompatible with older 0.5.x liburcu. The .so version number
 310           is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
 311         * Added "atfork" handling API, documented in README. Only useful for
 312           processes using fork() without following exec().
 313         * Renaming the following files, keeping the old files (producing a
 314           compiler warning):
 315             urcu/uatomic_arch.h -> urcu/uatomic.h
 316             urcu/urcu-futex.h -> urcu/futex.h
 317             urcu/urcu_ref.h -> urcu/ref.h
 318
 319 2011-03-04 Userspace RCU 0.5.4
 320          *  urcu-bp: Update fork() handling
 321
 322             Introduce
 323
 324             extern void rcu_bp_before_fork(void);
 325             extern void rcu_bp_after_fork_parent(void);
 326             extern void rcu_bp_after_fork_child(void);
 327
 328             to handle fork gracefully. These disable signals and hold
 329             the registry mutex across forks. (this flavor of the liburcu
 330             library ("bp" for "bulletproof") is mainly used by UST, the
 331             user-space tracer).
 332
 333 2011-03-03 Userspace RCU 0.5.3
 334         * Add support for older ARM single-CPU architecturess (pre-ARMv7)
 335           (thanks to Jason Wessel from WindRiver).
 336         * Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
 337         * Remove leftover list_t type from urcu/list.h (namespace cleanup).
 338         * urcu_defer: handle malloc error value.
 339         * Update README file to describe urcu interaction with fork() when not
 340         * followed
 341           by an exec() system call.
 342
 343 2010-11-18 Userspace RCU 0.5.2
 344         * Fix renaming error introduced in 0.5.0.
 345
 346 2010-11-18 Userspace RCU 0.5.1
 347         * Fix renaming error introduced in 0.5.0. (incomplete fix)
 348
 349 2010-11-18 Userspace RCU 0.5.0
 350         * Version 0.5.0 changes the API presented by memory model,
 351           architecture abstraction and data structure primitives in
 352           headers. The prefixes are, respectively:
 353             - cmm_ : Concurrent Memory Model
 354             - caa_ : Concurrent Architecture Abstraction
 355             - cds_ : Concurrent Data Structures
 356
 357 2010-03-04 Userspace RCU 0.4.2
 358         * Add generic uatomic ops support.
 359         * Bugfix in urcu-bp. (rare garbage collection bug occurring in
 360           multithreaded environment). Only affects urcu-bp users (UST).
 361
 362 2010-02-12 Userspace RCU 0.4.1
 363         * s390: compilation fix.
 364
 365 2010-01-30 Userspace RCU 0.4.0
 366         * API change: SIGURCU -> SIGRCU
 367         * API changes: standardize on rcu_ prefix.
 368         * API change: urcu_init -> rcu_init.
 369         * urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
 370           CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
 371           ((moving from URCU -> RCU).
 372         * library names changes: liburcu becomes the "default" version, using
 373           sys_membarrier() when available, and using liburcu-mb as a
 374           fallback.
 375         * The signal-based liburcu is renamed from liburcu to
 376           liburcu-signal. People previously using the signal-based
 377           "liburcu" will automatically be moved to the "default" liburcu
 378           version.
 379
 380 2009-11-16 Userspace RCU 0.3.1
 381         * Add support for sparcv9 32-bit build.
 382         * Update build system to use --host instead of --target.
 383
 384 2009-11-03 Userspace RCU 0.3.0
 385         * API change for the "deferred work" interface.
 386
 387 2009-10-14 Userspace RCU 0.2.3
 388         * Move to autotools.
 389         * Automated architecture detection, with i386 fallback.
 390         * Detect if NR_futex is on the system, fallback on portable
 391           alternatives.
 392         * Add configure mode for UP-only systems.
 393
 394 2009-10-02 Userspace RCU 0.2.2
 395         * Phases out rcu_publish_content() api.
 396         * Adds type checking to urcu-pointer.h pointer exchange primitives.
 397
 398 2009-10-02 Userspace RCU 0.2.1
 399         * small header dependency fix for rculist.h.
 400         * new "liburcu-bp.so" : "Bulletproof RCU", made especially for
 401           the UST userspace tracer. It's a library that sacrifices a bit
 402           of read-side performance for automatically monitoring thread
 403           creation/removal. See README for details.
 404
 405 2009-10-01 Userspace RCU 0.2
 406         * Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
 407           rcu_set_pointer.
 408
 409 2009-09-29 Userspace RCU 0.1
 410         * Initial release.