On Mon, Nov 22, 2010 at 03:43:52PM +0000, Mel Gorman wrote: > Migration synchronously waits for writeback if the initial passes fails. > Callers of memory compaction do not necessarily want this behaviour if the > caller is latency sensitive or expects that synchronous migration is not > going to have a significantly better success rate. > > This patch adds a sync parameter to migrate_pages() allowing the caller to > indicate if wait_on_page_writeback() is allowed within migration or not. For > reclaim/compaction, try_to_compact_pages() is first called asynchronously, > direct reclaim runs and then try_to_compact_pages() is called synchronously > as there is a greater expectation that it'll succeed. > > Signed-off-by: Mel Gorman <mel@xxxxxxxxx> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> -- 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>