Add ChangeLog.

Add ChangeLog, which briefly summarizes releases.

Edit README and INSTALL.

jemalloc/ChangeLog

@@ -0,0 +1,130 @@
+Following are change highlights associated with official releases.  Important
+bug fixes are all mentioned, but internal enhancements are omitted here for
+brevity (even though they are more fun to write about).  Much more detail can be
+found in the git revision history:
+
+    http://www.canonware.com/cgi-bin/gitweb.cgi?p=jemalloc.git
+    git://canonware.com/jemalloc.git
+
+* 2.0.0
+
+  This version focuses on the experimental *allocm() API, and on improved
+  run-time configuration/introspection.  Nonetheless, numerous performance
+  improvements are also included.
+
+  New features:
+    - Implement the experimental {,r,s,d}allocm() API, which provides a superset
+      of the functionality available via malloc(), calloc(), posix_memalign(),
+      realloc(), malloc_usable_size(), and free().  These functions can be used
+      to allocate/reallocate aligned zeroed memory, ask for optional extra
+      memory during reallocation, prevent object movement during reallocation,
+      etc.
+    - Replace JEMALLOC_OPTIONS/JEMALLOC_PROF_PREFIX with MALLOC_CONF, which is
+      more human-readable, and more flexible.  For example:
+        JEMALLOC_OPTIONS=AJP
+      is now:
+        MALLOC_CONF=abort:true,fill:true,stats_print:true
+    - Port to Apple OS X.  Sponsored by Mozilla.
+    - Make it possible for the application to control thread-->arena mappings
+      via the "thread.arena" mallctl.
+    - Add compile-time support for all TLS-related functionality via pthreads
+      TSD.  This is mainly of interest for OS X, which does not support TLS, but
+      has a TSD implementation with similar performance.
+    - Override memalign() and valloc() if they are provided by the system.
+    - Add the "arenas.purge" mallctl, which can be used to synchronously purge
+      all dirty unused pages.
+    - Make cumulative heap profiling data optional, so that it is possible to
+      limit the amount of memory consumed by heap profiling data structures.
+    - Add per thread allocation counters that can be accessed via the
+      "thread.allocated" and "thread.deallocated" mallctls.
+
+  Incompatible changes:
+    - Remove JEMALLOC_OPTIONS and malloc_options (see MALLOC_CONF above).
+    - Increase default backtrace depth from 4 to 128 for heap profiling.
+    - Disable interval-based profile dumps by default.
+
+  Bug fixes:
+  - Remove bad assertions in fork handler functions.  These assertions could
+    cause aborts for some combinations of configure settings.
+  - Fix strerror_r() usage to deal with non-standard semantics in GNU libc.
+  - Fix leak context reporting.  This bug tended to cause the number of contexts
+    to be underreported (though the reported number of objects and bytes were
+    correct).
+  - Fix a realloc() bug for large in-place growing reallocation.  This bug could
+    cause memory corruption, but it was hard to trigger.
+  - Fix an allocation bug for small allocations that could be triggered if
+    multiple threads raced to create a new run of backing pages.
+  - Enhance the heap profiler to trigger samples based on usable size, rather
+    than request size.
+  - Fix a heap profiling bug due to sometimes losing track of requested object
+    size for sampled objects.
+
+* 1.0.3
+
+  Bug fixes:
+  - Fix the libunwind-based implementation of stack backtracing (used for heap
+    profiling).  This bug could cause zero-length backtraces to be reported.
+  - Add a missing mutex unlock in library initialization code.  If multiple
+    threads raced to initialize malloc, some of them could end up permanently
+    blocked.
+
+* 1.0.2
+
+  Bug fixes:
+  - Fix junk filling of large objects, which could cause memory corruption.
+  - Add MAP_NORESERVE support for chunk mapping, because otherwise virtual
+    memory limits could cause swap file configuration to fail.  Contributed by
+    Jordan DeLong.
+
+* 1.0.1
+
+  Bug fixes:
+  - Fix compilation when --enable-fill is specified.
+  - Fix threads-related profiling bugs that affected accuracy and caused memory
+    to be leaked during thread exit.
+  - Fix dirty page purging race conditions that could cause crashes.
+  - Fix crash in tcache flushing code during thread destruction.
+
+* 1.0.0
+
+  This release focuses on speed and run-time introspection.  Numerous
+  algorithmic improvements make this release substantially faster than its
+  predecessors.
+
+  New features:
+  - Implement autoconf-based configuration system.
+  - Add mallctl*(), for the purposes of introspection and run-time
+    configuration.
+  - Make it possible for the application to manually flush a thread's cache, via
+    the "tcache.flush" mallctl.
+  - Base maximum dirty page count on proportion of active memory.
+  - Compute various addtional run-time statistics, including per size class
+    statistics for large objects.
+  - Expose malloc_stats_print(), which can be called repeatedly by the
+    application.
+  - Simplify the malloc_message() signature to only take one string argument,
+    and incorporate an opaque data pointer argument for use by the application
+    in combination with malloc_stats_print().
+  - Add support for allocation backed by one or more swap files, and allow the
+    application to disable over-commit if swap files are in use.
+  - Implement allocation profiling and leak checking.
+
+  Removed features:
+  - Remove the dynamic arena rebalancing code, since thread-specific caching
+    reduces its utility.
+
+  Bug fixes:
+  - Modify chunk allocation to work when address space layout randomization
+    (ASLR) is in use.
+  - Fix thread cleanup bugs related to TLS destruction.
+  - Handle 0-size allocation requests in posix_memalign().
+  - Fix a chunk leak.  The leaked chunks were never touched, so this impacted
+    virtual memory usage, but not physical memory usage.
+
+* linux_20080828a, linux_20080827a
+
+  These snapshot releases are the simple result of incorporating Linux-specific
+  support into the FreeBSD malloc sources.
+
+--------------------------------------------------------------------------------
+vim:filetype=text:textwidth=80

jemalloc/INSTALL

@@ -35,9 +35,8 @@ any of the following arguments (not a definitive list) to 'configure':
       /etc/malloc.conf --> /etc/prefix_malloc.conf
       MALLOC_CONF      --> PREFIX_MALLOC_CONF
 
-    This makes it possible to use jemalloc at the same time as the
+    This makes it possible to use jemalloc at the same time as the system
-    system allocator, or even to use multiple copies of jemalloc
+    allocator, or even to use multiple copies of jemalloc simultaneously.
-    simultaneously.
 
     By default, the prefix is "", except on OS X, where it is "je_".  On OS X,
     jemalloc overlays the default malloc zone, but makes no attempt to actually
@@ -58,12 +57,12 @@ any of the following arguments (not a definitive list) to 'configure':
     performance hit, but is very useful during application development.
 
 --enable-stats
-    Enable statistics gathering functionality.  Use the 'P' option to print
+    Enable statistics gathering functionality.  See the "opt.stats_print"
-    detailed allocation statistics at exit.
+    option documentation for usage details.
 
 --enable-prof
-    Enable heap profiling and leak detection functionality.  Use the 'B', 'E',
+    Enable heap profiling and leak detection functionality.  See the "opt.prof"
-    'F', 'I', 'L', and 'U' options to control these features.
+    option documention for usage details.
 
 --disable-prof-libgcc
     Disable the use of libgcc's backtracing functionality.  Ordinarily, libgcc's
@@ -89,8 +88,8 @@ any of the following arguments (not a definitive list) to 'configure':
 
 --disable-tcache
     Disable thread-specific caches for small objects.  Objects are cached and
-    released in bulk, thus reducing the total number of mutex operations.  Use
+    released in bulk, thus reducing the total number of mutex operations.  See
-    the 'H', 'G', and 'M' options to control thread-specific caching.
+    the "opt.tcache" option for suage details.
 
 --enable-swap
     Enable mmap()ed swap file support.  When this feature is built in, it is
@@ -102,18 +101,18 @@ any of the following arguments (not a definitive list) to 'configure':
     mmap(2).
 
 --enable-fill
-    Enable support for junk/zero filling of memory.  Use the 'J' option to
+    Enable support for junk/zero filling of memory.  See the "opt.junk"/
-    control junk filling, or the 'Z' option to control zero filling.
+    "opt.zero" option documentation for usage details.
 
 --enable-xmalloc
     Enable support for optional immediate termination due to out-of-memory
     errors, as is commonly implemented by "xmalloc" wrapper function for malloc.
-    Use the 'X' option to control termination behavior.
+    See the "opt.xmalloc" option documentation for usage details.
 
 --enable-sysv
     Enable support for System V semantics, wherein malloc(0) returns NULL
-    rather than a minimal allocation.  Use the 'V' option to control System V
+    rather than a minimal allocation.  See the "opt.sysv" option documentation
-    compatibility.
+    for usage details.
 
 --enable-dynamic-page-shift
     Under most conditions, the system page size never changes (usually 4KiB or

jemalloc/README

@@ -1,9 +1,9 @@
 jemalloc is a general-purpose scalable concurrent malloc(3) implementation.
 This distribution is a stand-alone "portable" implementation that currently
-targets only Linux.  jemalloc is included as the default allocator in the
+targets Linux and Apple OS X.  jemalloc is included as the default allocator in
-FreeBSD and NetBSD operating systems, and it is used by the Mozilla Firefox web
+the FreeBSD and NetBSD operating systems, and it is used by the Mozilla Firefox
-browser on Microsoft Windows-related platforms.  Depending on your needs, one
+web browser on Microsoft Windows-related platforms.  Depending on your needs,
-of the other divergent versions may suit your needs better than this
+one of the other divergent versions may suit your needs better than this
 distribution.
 
 The COPYING file contains copyright and licensing information.
@@ -11,4 +11,6 @@ The COPYING file contains copyright and licensing information.
 The INSTALL file contains information on how to configure, build, and install
 jemalloc.
 
+The ChangeLog file contains a brief summary of changes for each release.
+
 URL: http://www.canonware.com/jemalloc/