http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50636
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-10-06
21:29:07 UTC ---
Perhaps on Linux, at least with recentish kernel, we could change release_pages
into keeping the pages in the G.free_pages chain, but call madvise
MADV_DONTNEED on the pages (and remember that we've done that so next
release_pages won't do it again unless we have since then alloc_page'd it). At
least on 64-bit hosts where there is plenty of address space. MADV_DONTNEED
will keep it around unless the kernel needs it for something else (something
e.g. glibc malloc uses too).
