Update jemalloc to 4.2.0.

1 files changed, 46 insertions, 2 deletions

diff --git a/contrib/jemalloc/ChangeLog b/contrib/jemalloc/ChangeLog
index 9cbfbf9636bf..c9ce7c4ddceb 100644
--- a/contrib/jemalloc/ChangeLog
+++ b/contrib/jemalloc/ChangeLog
@@ -4,6 +4,50 @@ brevity.  Much more detail can be found in the git revision history:
 
     https://github.com/jemalloc/jemalloc
 
+* 4.2.0 (May 12, 2016)
+
+  New features:
+  - Add the arena.<i>.reset mallctl, which makes it possible to discard all of
+    an arena's allocations in a single operation.  (@jasone)
+  - Add the stats.retained and stats.arenas.<i>.retained statistics.  (@jasone)
+  - Add the --with-version configure option.  (@jasone)
+  - Support --with-lg-page values larger than actual page size.  (@jasone)
+
+  Optimizations:
+  - Use pairing heaps rather than red-black trees for various hot data
+    structures.  (@djwatson, @jasone)
+  - Streamline fast paths of rtree operations.  (@jasone)
+  - Optimize the fast paths of calloc() and [m,d,sd]allocx().  (@jasone)
+  - Decommit unused virtual memory if the OS does not overcommit.  (@jasone)
+  - Specify MAP_NORESERVE on Linux if [heuristic] overcommit is active, in order
+    to avoid unfortunate interactions during fork(2).  (@jasone)
+
+  Bug fixes:
+  - Fix chunk accounting related to triggering gdump profiles.  (@jasone)
+  - Link against librt for clock_gettime(2) if glibc < 2.17.  (@jasone)
+  - Scale leak report summary according to sampling probability.  (@jasone)
+
+* 4.1.1 (May 3, 2016)
+
+  This bugfix release resolves a variety of mostly minor issues, though the
+  bitmap fix is critical for 64-bit Windows.
+
+  Bug fixes:
+  - Fix the linear scan version of bitmap_sfu() to shift by the proper amount
+    even when sizeof(long) is not the same as sizeof(void *), as on 64-bit
+    Windows.  (@jasone)
+  - Fix hashing functions to avoid unaligned memory accesses (and resulting
+    crashes).  This is relevant at least to some ARM-based platforms.
+    (@rkmisra)
+  - Fix fork()-related lock rank ordering reversals.  These reversals were
+    unlikely to cause deadlocks in practice except when heap profiling was
+    enabled and active.  (@jasone)
+  - Fix various chunk leaks in OOM code paths.  (@jasone)
+  - Fix malloc_stats_print() to print opt.narenas correctly.  (@jasone)
+  - Fix MSVC-specific build/test issues.  (@rustyx, @yuslepukhin)
+  - Fix a variety of test failures that were due to test fragility rather than
+    core bugs.  (@jasone)
+
 * 4.1.0 (February 28, 2016)
 
   This release is primarily about optimizations, but it also incorporates a lot
@@ -59,14 +103,14 @@ brevity.  Much more detail can be found in the git revision history:
   Bug fixes:
   - Fix stats.cactive accounting regression.  (@rustyx, @jasone)
   - Handle unaligned keys in hash().  This caused problems for some ARM systems.
-    (@jasone, Christopher Ferris)
+    (@jasone, @cferris1000)
   - Refactor arenas array.  In addition to fixing a fork-related deadlock, this
     makes arena lookups faster and simpler.  (@jasone)
   - Move retained memory allocation out of the default chunk allocation
     function, to a location that gets executed even if the application installs
     a custom chunk allocation function.  This resolves a virtual memory leak.
     (@buchgr)
-  - Fix a potential tsd cleanup leak.  (Christopher Ferris, @jasone)
+  - Fix a potential tsd cleanup leak.  (@cferris1000, @jasone)
   - Fix run quantization.  In practice this bug had no impact unless
     applications requested memory with alignment exceeding one page.
     (@jasone, @djwatson)