On Tue, 2012-05-29 at 09:56 -0400, Rik van Riel wrote: > On 05/29/2012 09:16 AM, Peter Zijlstra wrote: > > On Fri, 2012-05-25 at 19:02 +0200, Andrea Arcangeli wrote: > > > 24 bytes per page.. or ~0.6% of memory gone. This is far too great a > > price to pay. > > > > At LSF/MM Rik already suggested you limit the number of pages that can > > be migrated concurrently and use this to move the extra list_head out of > > struct page and into a smaller amount of extra structures, reducing the > > total overhead. > > For THP, we should be able to track this NUMA info on a > 2MB page granularity. Yeah, but that's another x86-only feature, _IF_ we're going to do this it must be done for all archs that have CONFIG_NUMA, thus we're stuck with 4k (or other base page size). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. 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