http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50636
--- Comment #15 from ak at gcc dot gnu.org 2011-10-17 14:43:45 UTC --- Author: ak Date: Mon Oct 17 14:43:37 2011 New Revision: 180093 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180093 Log: 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 <a...@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. Modified: trunk/gcc/ChangeLog trunk/gcc/config.in trunk/gcc/configure trunk/gcc/configure.ac trunk/gcc/ggc-page.c
