http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50636
--- Comment #3 from Andi Kleen <andi-gcc at firstfloor dot org> 2011-10-06 21:31:56 UTC --- I would prefer to free in 2MB chunks if possible I was experimenting with increasing the quire size from 1 to 2MB so that a modern kernel with transparent huge pages can always get a huge page. If the freeing also happens in the same chunks the kernel can keep the 2MB pages together. But yes MADV_DONTNEED makes sense too.
