diff options
| author | Andi Kleen <ak@linux.intel.com> | 2011-10-17 14:43:37 +0000 |
|---|---|---|
| committer | Andi Kleen <ak@gcc.gnu.org> | 2011-10-17 14:43:37 +0000 |
| commit | 711a3d82e524cae4fa2acce8f2e363f0f23a6032 (patch) | |
| tree | b0f5ec12dbc9d0cd2f36e94c063c914fbfe5bb72 /gcc/configure.ac | |
| parent | 411f92de7a3e15a42d3d640e5f7a0bc4cfc3e049 (diff) | |
| download | gcc-711a3d82e524cae4fa2acce8f2e363f0f23a6032.zip gcc-711a3d82e524cae4fa2acce8f2e363f0f23a6032.tar.gz gcc-711a3d82e524cae4fa2acce8f2e363f0f23a6032.tar.bz2 | |
Use MADV_DONTNEED for freeing in garbage collector
Use the Linux MADV_DONTNEED call to unmap free pages in the garbage
collector.Then keep the unmapped pages in the free list. This avoid
excessive memory fragmentation on large LTO bulds, which can lead
to gcc bumping into the Linux vm_max_map limit per process.
gcc/:
2011-10-08 Andi Kleen <ak@linux.intel.com>
PR other/50636
* config.in, configure: Regenerate.
* configure.ac (madvise): Add to AC_CHECK_FUNCS.
* ggc-page.c (USING_MADVISE): Add.
(page_entry): Add discarded field.
(alloc_page): Check for discarded pages.
(release_pages): Add USING_MADVISE branch.
From-SVN: r180093
Diffstat (limited to 'gcc/configure.ac')
| -rw-r--r-- | gcc/configure.ac | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/configure.ac b/gcc/configure.ac index a7b94e6..357902e 100644 --- a/gcc/configure.ac +++ b/gcc/configure.ac @@ -1027,7 +1027,7 @@ define(gcc_UNLOCKED_FUNCS, clearerr_unlocked feof_unlocked dnl AC_CHECK_FUNCS(times clock kill getrlimit setrlimit atoll atoq \ sysconf strsignal getrusage nl_langinfo \ gettimeofday mbstowcs wcswidth mmap setlocale \ - gcc_UNLOCKED_FUNCS) + gcc_UNLOCKED_FUNCS madvise) if test x$ac_cv_func_mbstowcs = xyes; then AC_CACHE_CHECK(whether mbstowcs works, gcc_cv_func_mbstowcs_works, |