On Wed, 17 Nov 2010 16:22:48 +0000 Mel Gorman <mel@xxxxxxxxx> wrote: > The end of the LRU stores the oldest known page. Compaction on the other > hand always starts scanning from the start of the zone. This patch uses > the LRU to hint to compaction where it should start scanning from. This > means that compaction will at least start with some old pages reducing > the impact on running processes and reducing the amount of scanning. The > check it makes is racy as the LRU lock is not taken but it should be > harmless as we are not manipulating the lists without the lock. > > Signed-off-by: Mel Gorman <mel@xxxxxxxxx> Hmm, does this patch make a noticable difference ? Isn't it better to start scan from the biggest free chunk in a zone ? 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 policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>