On Thu, May 12, 2011 at 08:11:05PM +0300, Pekka Enberg wrote: > If it's this: > > http://pkgs.fedoraproject.org/gitweb/?p=kernel.git;a=blob_plain;f=config-x86_64-generic;hb=HEAD > > I'd love to see what happens if you disable > > CONFIG_TRANSPARENT_HUGEPAGE=y > > because that's going to reduce high order allocations as well, no? Well THP forces COMPACTION=y so lumpy won't risk to be activated. I got once a complaint asking not to make THP force COMPACTION=y (there is no real dependency here, THP will just call alloc_pages with __GFP_NO_KSWAPD and order 9, or 10 on x86-nopae), but I preferred to keep it forced exactly to avoid issues like these when THP is on. If even order 3 is causing troubles (which doesn't immediately make lumpy activated, it only activates when priority is < DEF_PRIORITY-2, so after 2 loops failing to reclaim nr_to_reclaim pages), imagine what was happening at order 9 every time firefox, gcc and mutt allocated memory ;). -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
