On Wed, 23 Feb 2011 10:19:22 -0800 Dave Hansen <dave@xxxxxxxxxxxxxxxxxx> wrote: > On Wed, 2011-02-23 at 16:10 +0100, Michal Hocko wrote: > > We can reduce this internal fragmentation by splitting the single > > page_cgroup array into more arrays where each one is well kmalloc > > aligned. This patch implements this idea. > > How about using alloc_pages_exact()? These things aren't allocated > often enough to really get most of the benefits of being in a slab. > That'll at least get you down to a maximum of about PAGE_SIZE wasted. > yes, alloc_pages_exact() is much better. packing page_cgroups for multiple sections causes breakage in memory hotplug logic. Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>