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| author | Jason Evans <je@fb.com> | 2012-05-09 23:12:00 (GMT) |
|---|---|---|
| committer | Jason Evans <je@fb.com> | 2012-05-09 23:12:00 (GMT) |
| commit | 2e671ffbadc02fc7de8cbafdd1031e3b0ad73c5b (patch) | |
| tree | c213a3be314bebed4c5b745fdcbdd252821e617d /configure.ac | |
| parent | 374d26a43bcceb12eb56ed7cc47815d7f933901c (diff) | |
| download | jemalloc-2e671ffbadc02fc7de8cbafdd1031e3b0ad73c5b.zip jemalloc-2e671ffbadc02fc7de8cbafdd1031e3b0ad73c5b.tar.gz jemalloc-2e671ffbadc02fc7de8cbafdd1031e3b0ad73c5b.tar.bz2 | |
Add the --enable-mremap option.
Add the --enable-mremap option, and disable the use of mremap(2) by
default, for the same reason that freeing chunks via munmap(2) is
disabled by default on Linux: semi-permanent VM map fragmentation.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 38 |
1 files changed, 28 insertions, 10 deletions
diff --git a/configure.ac b/configure.ac index 3b32b88..a09db7d 100644 --- a/configure.ac +++ b/configure.ac @@ -372,16 +372,6 @@ else AC_DEFINE([JEMALLOC_TLS_MODEL], [ ]) fi -JE_COMPILABLE([mremap(...MREMAP_FIXED...)], [ -#define _GNU_SOURCE -#include <sys/mman.h> -], [ -void *p = mremap((void *)0, 0, 0, MREMAP_MAYMOVE|MREMAP_FIXED, (void *)0); -], [je_cv_mremap_fixed]) -if test "x${je_cv_mremap_fixed}" = "xyes" ; then - AC_DEFINE([JEMALLOC_MREMAP_FIXED], [ ]) -fi - dnl Support optional additions to rpath. AC_ARG_WITH([rpath], [AS_HELP_STRING([--with-rpath=<rpath>], [Colon-separated rpath (ELF systems only)])], @@ -743,6 +733,33 @@ if test "x$enable_tcache" = "x1" ; then fi AC_SUBST([enable_tcache]) +dnl Disable mremap() for huge realloc() by default. +AC_ARG_ENABLE([mremap], + [AS_HELP_STRING([--enable-mremap], [Enable mremap(2) for huge realloc()])], +[if test "x$enable_mremap" = "xno" ; then + enable_mremap="0" +else + enable_mremap="1" +fi +], +[enable_mremap="0"] +) +if test "x$enable_mremap" = "x1" ; then + JE_COMPILABLE([mremap(...MREMAP_FIXED...)], [ +#define _GNU_SOURCE +#include <sys/mman.h> +], [ +void *p = mremap((void *)0, 0, 0, MREMAP_MAYMOVE|MREMAP_FIXED, (void *)0); +], [je_cv_mremap_fixed]) + if test "x${je_cv_mremap_fixed}" = "xno" ; then + enable_mremap="0" + fi +fi +if test "x$enable_mremap" = "x1" ; then + AC_DEFINE([JEMALLOC_MREMAP], [ ]) +fi +AC_SUBST([enable_mremap]) + dnl Enable VM deallocation via munmap() by default. AC_ARG_ENABLE([munmap], [AS_HELP_STRING([--disable-munmap], [Disable VM deallocation via munmap(2)])], @@ -1261,6 +1278,7 @@ AC_MSG_RESULT([fill : ${enable_fill}]) AC_MSG_RESULT([utrace : ${enable_utrace}]) AC_MSG_RESULT([valgrind : ${enable_valgrind}]) AC_MSG_RESULT([xmalloc : ${enable_xmalloc}]) +AC_MSG_RESULT([mremap : ${enable_mremap}]) AC_MSG_RESULT([munmap : ${enable_munmap}]) AC_MSG_RESULT([dss : ${enable_dss}]) AC_MSG_RESULT([lazy_lock : ${enable_lazy_lock}]) |