ChangeLog

   1 2016-04-26 Userspace RCU 0.7.17
   2         * Fix: urcu-signal: smp_mb_master() needs registry lock
   3
   4 2015-10-16 Userspace RCU 0.7.16
   5         * Fix: format string signedness
   6         * Use gcc atomics on aarch64/powerpc64le
   7         * Fix: compat_futex: uninitialized ret variable
   8         * Fix: compat_futex_noasync: don't override return value
   9         * Fix: stable-0.7 branch does not have syscall-compat.h
  10         * Fix: dynamic fallback to compat futex on sys_futex ENOSYS
  11
  12 2015-09-09 Userspace RCU 0.7.15
  13         * Disable sys_membarrier
  14         * uatomic: Specify complete types for atomic function calls
  15         * Fix: handle sys_futex() FUTEX_WAIT interrupted by signal
  16         * Fix: compat_futex.c: *uaddr should be read as volatile
  17         * Fix: call_rcu_thread() affinity failure
  18         * urcu: fix deprecation warning with new glibc
  19
  20 2015-04-28 Userspace RCU 0.7.14
  21         * Fix: call rcu should call internal RCU API
  22         * Fix: deadlock when thread join is issued in read-side C.S.
  23         * Fix: rename RCU_DEBUG to DEBUG_RCU in urcu-qsbr.h
  24         * Mark braced-groups within expressions with __extension__
  25         * Fix: compat_futex_noasync race condition
  26         * Fix: documentation: urcu-pointer.h: s/rcu_dereference_pointer/rcu_dereference/
  27         * Fix: silence gcc -Wextra warning
  28
  29 2014-10-21 Userspace RCU 0.7.13
  30         * rculfhash: remove duplicated code
  31         * rculfhash: handle pthread_create failures
  32         * rculfhash: fall back to single-threaded resize on calloc failure
  33         * x86: drop extra semi-colon in caa_cpu_relax
  34         * call_rcu threads should clear their PAUSED flag when they unpause
  35         * Fix: bring back dummy rcu_bp_exit symbol
  36
  37 2014-03-08 Userspace RCU 0.7.12
  38         * Fix: move wait loop increment before first conditional block
  39
  40 2014-03-01 Userspace RCU 0.7.11
  41         * Fix: high cpu usage in synchronize_rcu with long RCU read-side C.S.
  42
  43 2014-02-28 Userspace RCU 0.7.10
  44         * Fix: urcu-bp interaction with threads vs constructors/destructors
  45         * Fix undefined NULL pointer arithmetic
  46         * Blacklist ARM gcc 4.8.0, 4.8.1, 4.8.2
  47         * rculfhash: document max_nr_buckets = 0
  48
  49 2013-11-12 Userspace RCU 0.7.9
  50         * tls-compat: fix comment typo
  51         * Keep ABI compatible with already compiled LGPL applications
  52         * Fix: tls-compat multi-lib conflict
  53         * gcc warning fixes: -Wsign-compare and -Wextra
  54         * Fix: urcu-qsbr: reversed logic on RCU_DEBUG
  55         * Fix: urcu-bp segfault in glibc pthread_kill()
  56         * Fix urcu-bp: don't move registry
  57         * Fix: compat futex duplicated lock and completion
  58         * Fix: i386 compat code duplicated mutex instances
  59         * Fix: urcu-bp: Bulletproof RCU arena resize bug
  60         * Fix: test_mutex.c uninitialized mutex
  61
  62 2013-09-06 Userspace RCU 0.7.8
  63         * Fix: hash table growth (for small tables) should be limited
  64         * Document build work-around on MacOS X
  65         * Fix tests: use of uninitialized variables
  66         * tests: add missing unsigned long casts to pthread_self()
  67
  68 2013-06-18 Userspace RCU 0.7.7
  69         * rculfhash: document destroy context limitation
  70         * Fix: Use a filled signal mask to disable all signals
  71         * Document: rculfhash destroy and resize side-effect in 0.7
  72         * Add "sparc" host cpu to configure.ac
  73         * Fix: tests/api.h use cpuset.h
  74         * Fix hurd-i386: move cpuset tests outside of sched_setaffinity conditional
  75         * Fix tests: finer-grained use of CPU_SET, CPU_ZERO and cpu_set_t
  76         * Test for CPU_SET
  77         * Fix build on architectures with HAVE_SCHED_GETCPU but without HAVE_SYSCONF
  78         * README: document that Clang 3.0 (based on LLVM 3.0) is supported
  79         * clang: silence "unused expression result" warning
  80         * rculfhash: add assertions on node alignment
  81         * uatomic: style fix
  82
  83 2013-01-09 Userspace RCU 0.7.6
  84         * Discourage use of pthread_atfork() for call_rcu handlers
  85         * Fix call_rcu fork handling
  86         * test: fork handling
  87         * Fix TLS detection: test with linker, add --disable-compiler-tls
  88         * Cleanup: cast pthread_self() return value to unsigned long
  89         * Fallback mechanism not working on platform where TLS is unsupported
  90
  91 2012-10-12 Userspace RCU 0.7.5
  92         * 19cf3ae Fix: call_rcu list corruption on teardown
  93         * Ensure that read-side functions meet 10-line LGPL criterion
  94         * tls-compat.h: document sigaltstack(2) limitation
  95         * urcu: add notice to URCU_TLS() for it is not strictly async-signal-safe
  96         * Document sigaltstack(2) limitation
  97         * Documentation: update LICENSE file
  98
  99 2012-08-27 Userspace RCU 0.7.4
 100         * rculfhash API documentation: document destroy RCU read-lock constraint
 101         * Fix: rculfhash should be offline while waiting for resize to complete
 102         * Add missing entry to gitignore
 103         * urcu: move busy-wait code and name it ___cds_wfq_node_sync_next()
 104         * urcu: fix compat_futex_noasync()
 105         * urcu: add hint to DEFINE_URCU_TLS() for compound types
 106         * Fix: CAA_BUILD_BUG_ON should refer to CAA_BUILD_BUG_ON_ZERO
 107         * Add MIPS support
 108         * Compatibility: remove bash-ismsm from test scripts
 109         * Fix inappropriate lib behavior: don't call exit()
 110         * Fix: re-enable compatibility with autoconf < 2.64
 111         * Fix c99 compatibility: use __asm__ and __volatile__ in public headers
 112         * Fix c99 compatibility: use __typeof__ instead of typeof in public headers
 113         * warning fix: tests urcutorture for NetBSD 5
 114
 115 2012-06-01 Userspace RCU 0.7.3
 116         * Fix tests: make dist lib dependency
 117         * Update README for OS supported, tests dependency
 118         * Add CodingStyle to tarball
 119         * Add coding style document
 120         * Test fix: test_perthreadlock uninitialized mutex
 121         * tests: support FreeBSD short "time" args
 122         * freebsd 8.2 fix: define MAP_ANONYMOUS for compatibility
 123
 124 2012-05-24 Userspace RCU 0.7.2
 125         * Fix library compatibility
 126
 127 2012-05-24 Userspace RCU 0.7.1
 128         * fix: uatomic_set return value compile fix for non-x86 arch.
 129
 130 2012-05-21 Userspace RCU 0.7.0
 131         * Cleanup: header comments coding style
 132         * Document uatomic operations
 133         * Update return value of "set" operations
 134         * Fix mremap wrapper for NetBSD 5
 135         * Use urcu/tls-compat.h
 136         * Implement urcu/tls-compat.h
 137         * Add TLS detection m4 macro
 138         * document concurrent data structures
 139         * documentation: refer to rcu-api.txt
 140         * Move API.txt to doc/rcu-api.txt, install in system doc/
 141         * rculfhash: document implied memory barriers
 142         * rculfhash: Ensure future-proof memory barrier semantic consistency
 143         * API cleanup: use "uatomic_*" in cmm_smp_mb__ API
 144         * uatomic: add memory barrier API for and/or/add/sub/inc/sub
 145         * rculfhash: add runhash.sh test script
 146         * rculfhash tests: add missing check
 147         * rculfhash: fix: race between replace and del operations
 148         * rculfhash: replace unneeded rcu_dereference by CMM_LOAD_SHARED
 149         * rculfhash: use do {} while (0) for dbg_printf()
 150         * rculfhash: cleanup typo
 151         * rculfhash: update API comments
 152         * rculfhash: update comments in implementation
 153         * rculfhash tests: add long hash chains tests
 154         * rculfhash tests: add uniqueness test
 155         * rculfhash test: print test name
 156         * rculfhash: stress requirement in documentation
 157         * rculfhash: fix typo
 158         * rculfhash tests: use array of callbacks to modularize
 159         * rculfhash tests: modularize tests
 160         * rculfhash: document ordering guarantees
 161         * rculfhash: document linearizability guarantees
 162         * rculfhash: update removal comment
 163         * Add missing files to .gitignore
 164         * Fix out-of-tree build
 165         * rculfhash: check malloc NULL pointer
 166         * Fix uatomic sign cast
 167         * Remove unused jhash.h file
 168         * Fix: use known license text, fix incorrect FSF address
 169         * Fix: add missing sched.h include in rculfhash.c
 170         * Allow tests to run on architectures without per-cpu call_rcu support
 171         * Hash table test: FreeBSD compatibility fix
 172         * tests: define _GNU_SOURCE instead of __USE_GNU
 173         * RCU lock-free hash table: implement cds_lfht_is_node_deleted()
 174         * Define _GNU_SOURCE to access CPU_ZERO() macro in uClibc
 175         * Install ChangeLog and README into system's doc
 176         * Fix AC_LANG_SOURCE usage: only takes one parameter
 177         * Fix autoconf futex check
 178         * configure.ac: Use AC_LANG_SOURCE for if else macros
 179         * Refresh autoconf files
 180         * Update gitignore
 181         * rculfhash: add comment about hash seed randomness within test program
 182         * readme: state correct GCC dependency for ARM
 183         * rculfhash: remove an invocation of bit_reverse_ulong() when adding
 184         * rculfhash: remove unneeded conversion
 185         * rculfhash: remove unneeded clear_flag()
 186         * cds_lfht_replace: add checks for old/new node hash/value match
 187         * rculfhash: use node instead of iter argument for deletion
 188         * rculfhash: number of logically removed nodes should not appear in API
 189         * Document that flags could be represented on 2 bits
 190         * Add missing REMOVAL_OWNER_FLAG comment to cds_lfht_node comment
 191         * _cds_lfht_del is not used for buckets anymore, remove parameter
 192         * rculfhash: Relax atomicity guarantees required by removal operation
 193         * remove unneeded "return;"
 194         * simplify the deletion for bucket node
 195         * Remove unneeded code
 196         * Cleanup DEFINE_RCU_FLAVOR()
 197         * Add cds_lfht_ prefix to fls_ulong, get_count_order_ulong, get_count_order_u32
 198         * Merge RCU Lock-Free Resizable Hash Table
 199
 200 2011-12-12 Userspace RCU 0.6.7
 201         * Add compat file for test urcu wfs
 202         * Add missing compat file for wfq test
 203         * hlist.h: Add missing stddef.h include for NULL
 204         * call_rcu: Add missing call_rcu_before_fork and
 205           call_rcu_after_fork_parent declarations
 206         * Describe autotools/libtool/automake version dependency
 207         * Remove m4_ifdef for AC_PROG_LIBTOOL (deprecated)
 208         * Support older autotools
 209         * Apply autoupdate to configure.ac
 210         * Fix build for amd64 environment (for FreeBSD 8.2)
 211         * Add missing rcu_dereference_sym_bp
 212         * Install test scripts in the dist tarball
 213
 214 2011-11-03 Userspace RCU 0.6.6
 215         * qsbr vs call_rcu : remove exit assertion
 216         * Rename likely/unlikely to caa_likely/caa_unlikely
 217         * Reinsert missing test_urcu_*.c files (missing in rename)
 218         * rename test_qsbr to test_urcu_qsbr
 219         * urcu-pointer: fix rcu_set_pointer unset return value
 220         * Enhance API.txt documentation, add to Makefile as EXTRA_DIST
 221
 222 2011-09-29 Userspace RCU 0.6.5
 223         * call_rcu: Document call_rcu requirements
 224         * call_rcu: fix error handling of malloc error
 225         * urcu call_rcu: Use RCU read-side protection for per-cpu call_rcu data
 226         * urcu,call_rcu: Cleanup call_rcu_data pointers before use in child
 227         * urcu,call_rcu: avoid create call_rcu_data for child when unneed
 228         * urcu,defer_rcu: Make defer_rcu encoding more compact for marker
 229         * urcu_defer: Use cancellation flag instead of pthread_cancel()
 230         * urcu,call_rcu: protects call_rcu_data_list when remove node
 231         * Create default call rcu data upon per-cpu call-rcu teardown
 232         * powerpc: use __NO_LWSYNC__ check to use appropriate lwsync/sync opcode
 233         * cmm: provide lightweight smp_rmb/smp_wmb on PPC
 234         * atomic: provide seq_cst semantics on powerpc
 235         * avoid leaking crdp for failed path
 236         * Return -EEXIST when the old cpu call_rcu_data has not been removed
 237         * protect writing to per_cpu_call_rcu_data[*]
 238         * wake up default call_rcu thread after we move the leftover callbacks
 239         * avoid memory leak in call_rcu_data_free()
 240         * urcu call_rcu: fix use after free()
 241         * use get_cpu_call_rcu_data() for get_call_rcu_data()
 242         * init maxcpus before use
 243         * call_rcu implementation: add missing static
 244         * Document QSBR interaction with mutexes
 245         * urcu-pointer: implement URCU_FORCE_CAST for C++ compatibility of urcu-pointer.h
 246         * urcu-qsbr: use rcu_thread_offline/rcu_thread_online instead of inlining them
 247         * Pair all_cpu call_rcu create with free
 248         * QSBR: add missing wakeups in synchronize_rcu code
 249         * cmm: do not generate code for smp_rmb/smp_wmb on x86_64
 250         * cmm: let per-arch files provide cmm_smp_* barriers
 251         * Optimize caa_get_cycles() for PowerPC64
 252         * lfq/lfs tests: use call_rcu
 253         * list: Add cds_list_first_entry
 254         * rculfstack/queue: define _LGPL_SOURCE around static header include
 255         * Add __rcu annotation (unimplemented)
 256         * Fix incorrect fsf address in header files
 257         * wfstack: push returns prior stack emptiness state
 258         * Make lf stack push return if the stack was empty
 259         * Document caa_container_of
 260         * urcu-bp: do not call munmap for NULL registry at exit
 261         * urcu libraries can directly use the _LGPL_SOURCE wfqueue
 262         * rculfstack: document "push"
 263         * Add runall.sh to tarball
 264         * Fix build order of liburcu-cds-common
 265         * Fix missing check for SYS_membarrier in map header
 266         * urcu-qsbr: avoid useless futex wakeups and burning CPU for long grace periods
 267         * api: reimplement BUILD_BUG_ON in compiler.h
 268         * test api cleanup: remove unused primitives
 269         * put thread offline while waiting for the init flag
 270         * urcu: move private definitions to .c file
 271         * urcu-bp: move private definitions to .c file
 272         * urcu-qsbr: move private definitions to .c file
 273         * rcutorture: fix rcutorture-qsbr
 274         * wfqueue: fix type-incorrect assignment
 275         * Fix tests Makefile EXTRA_DIST to use api.h
 276         * Fix choice of default flavour in urcu/map/urcu.h
 277         * api: remove list/hlist
 278         * api: remove arch-specific files
 279         * api: make api_gcc.h a superset of the other headers
 280         * tests api: remove atomics
 281         * put thread offline while waiting for the init flag
 282         * urcu: move private definitions to .c file
 283         * urcu-bp: move private definitions to .c file
 284         * urcu-qsbr: move private definitions to .c file
 285         * rcutorture: fix rcutorture-qsbr
 286         * wfqueue: fix type-incorrect assignment
 287         * Use caa_ prefix for min() and max()
 288
 289 2011-07-21 Userspace RCU 0.6.4
 290         * uatomic: Fix ARM build errors in uatomic.
 291         * urcu tests: hold mutex across use of custom allocator.
 292         * Portability fixes to support FreeBSD 8.2.
 293
 294 2011-06-27 Userspace RCU 0.6.3
 295         * uatomic: Fix i386 compatibility build errors in uatomic.
 296
 297 2011-06-13 Userspace RCU 0.6.2
 298         * Fix build on powerpc.
 299
 300 2011-06-13 Userspace RCU 0.6.1
 301         * Add missing headers into release tarball:
 302             urcu-call-rcu-impl.h and urcu-defer-impl.h
 303
 304 2011-06-10 Userspace RCU 0.6.0
 305         * Added call_rcu() support, graciously contributed by Paul E. McKenney.
 306         * Added urcu/cds.h and merged all "Concurrent Data Containers" (CDS)
 307           into a single .so: liburcu-cds.so to have a single header/shared
 308           object holding all concurrency-aware data containers. It provides
 309           support for RCU lists, queues and stacks at the moment.
 310         * liburcu 0.6.0 now allows linking a single application with multiple
 311           flavors of RCU. This required a library API change which is
 312           incompatible with older 0.5.x liburcu. The .so version number
 313           is therefore bumped from 0 to 1 (e.g. liburcu.so.1).
 314         * Added "atfork" handling API, documented in README. Only useful for
 315           processes using fork() without following exec().
 316         * Renaming the following files, keeping the old files (producing a
 317           compiler warning):
 318             urcu/uatomic_arch.h -> urcu/uatomic.h
 319             urcu/urcu-futex.h -> urcu/futex.h
 320             urcu/urcu_ref.h -> urcu/ref.h
 321
 322 2011-03-04 Userspace RCU 0.5.4
 323          *  urcu-bp: Update fork() handling
 324
 325             Introduce
 326
 327             extern void rcu_bp_before_fork(void);
 328             extern void rcu_bp_after_fork_parent(void);
 329             extern void rcu_bp_after_fork_child(void);
 330
 331             to handle fork gracefully. These disable signals and hold
 332             the registry mutex across forks. (this flavor of the liburcu
 333             library ("bp" for "bulletproof") is mainly used by UST, the
 334             user-space tracer).
 335
 336 2011-03-03 Userspace RCU 0.5.3
 337         * Add support for older ARM single-CPU architecturess (pre-ARMv7)
 338           (thanks to Jason Wessel from WindRiver).
 339         * Fix ARMv7 cmm_rmb/cmm_wmb primitives (use a dmb barrier).
 340         * Remove leftover list_t type from urcu/list.h (namespace cleanup).
 341         * urcu_defer: handle malloc error value.
 342         * Update README file to describe urcu interaction with fork() when not
 343         * followed
 344           by an exec() system call.
 345
 346 2010-11-18 Userspace RCU 0.5.2
 347         * Fix renaming error introduced in 0.5.0.
 348
 349 2010-11-18 Userspace RCU 0.5.1
 350         * Fix renaming error introduced in 0.5.0. (incomplete fix)
 351
 352 2010-11-18 Userspace RCU 0.5.0
 353         * Version 0.5.0 changes the API presented by memory model,
 354           architecture abstraction and data structure primitives in
 355           headers. The prefixes are, respectively:
 356             - cmm_ : Concurrent Memory Model
 357             - caa_ : Concurrent Architecture Abstraction
 358             - cds_ : Concurrent Data Structures
 359
 360 2010-03-04 Userspace RCU 0.4.2
 361         * Add generic uatomic ops support.
 362         * Bugfix in urcu-bp. (rare garbage collection bug occurring in
 363           multithreaded environment). Only affects urcu-bp users (UST).
 364
 365 2010-02-12 Userspace RCU 0.4.1
 366         * s390: compilation fix.
 367
 368 2010-01-30 Userspace RCU 0.4.0
 369         * API change: SIGURCU -> SIGRCU
 370         * API changes: standardize on rcu_ prefix.
 371         * API change: urcu_init -> rcu_init.
 372         * urcu/config.h options renamed to CONFIG_RCU_HAVE_FENCE,
 373           CONFIG_RCU_HAVE_FUTEX, CONFIG_RCU_SMP, CONFIG_RCU_COMPAT_ARCH.
 374           ((moving from URCU -> RCU).
 375         * library names changes: liburcu becomes the "default" version, using
 376           sys_membarrier() when available, and using liburcu-mb as a
 377           fallback.
 378         * The signal-based liburcu is renamed from liburcu to
 379           liburcu-signal. People previously using the signal-based
 380           "liburcu" will automatically be moved to the "default" liburcu
 381           version.
 382
 383 2009-11-16 Userspace RCU 0.3.1
 384         * Add support for sparcv9 32-bit build.
 385         * Update build system to use --host instead of --target.
 386
 387 2009-11-03 Userspace RCU 0.3.0
 388         * API change for the "deferred work" interface.
 389
 390 2009-10-14 Userspace RCU 0.2.3
 391         * Move to autotools.
 392         * Automated architecture detection, with i386 fallback.
 393         * Detect if NR_futex is on the system, fallback on portable
 394           alternatives.
 395         * Add configure mode for UP-only systems.
 396
 397 2009-10-02 Userspace RCU 0.2.2
 398         * Phases out rcu_publish_content() api.
 399         * Adds type checking to urcu-pointer.h pointer exchange primitives.
 400
 401 2009-10-02 Userspace RCU 0.2.1
 402         * small header dependency fix for rculist.h.
 403         * new "liburcu-bp.so" : "Bulletproof RCU", made especially for
 404           the UST userspace tracer. It's a library that sacrifices a bit
 405           of read-side performance for automatically monitoring thread
 406           creation/removal. See README for details.
 407
 408 2009-10-01 Userspace RCU 0.2
 409         * Clarify usage of rcu_cmpxchg_pointer, rcu_xchg_pointer,
 410           rcu_set_pointer.
 411
 412 2009-09-29 Userspace RCU 0.1
 413         * Initial release.