On Wed, 28 Nov 2012 10:13:59 +0000 Mel Gorman <mgorman@xxxxxxx> wrote: > Based on the reports I've seen I expect the following to work for 3.7 > > Keep > 96710098 mm: revert "mm: vmscan: scale number of pages reclaimed by reclaim/compaction based on failures" > ef6c5be6 fix incorrect NR_FREE_PAGES accounting (appears like memory leak) > > Revert > 82b212f4 Revert "mm: remove __GFP_NO_KSWAPD" > > Merge > mm: vmscan: fix kswapd endless loop on higher order allocation > mm: Avoid waking kswapd for THP allocations when compaction is deferred or contended "mm: Avoid waking kswapd for THP ..." is marked "I have not tested it myself" and when Zdenek tested it he hit an unexplained oom. > Johannes' patch should remove the necessity for __GFP_NO_KSWAPD revert but I > think we should also avoid waking kswapd for THP allocations if compaction > is deferred. Johannes' patch might mean that kswapd goes quickly go back > to sleep but it's still busy work. > > 3.6 is still known to be screwed in terms of THP because of the amount of > time it can spend in compaction after lumpy reclaim was removed. This is > my old list of patches I felt needed to be backported after 3.7 came out. > They are not tagged -stable, I'll be sending it to Greg manually. > > e64c523 mm: compaction: abort compaction loop if lock is contended or run too long > 3cc668f mm: compaction: move fatal signal check out of compact_checklock_irqsave > 661c4cb mm: compaction: Update try_to_compact_pages()kerneldoc comment > 2a1402a mm: compaction: acquire the zone->lru_lock as late as possible > f40d1e4 mm: compaction: acquire the zone->lock as late as possible > 753341a revert "mm: have order > 0 compaction start off where it left" > bb13ffe mm: compaction: cache if a pageblock was scanned and no pages were isolated > c89511a mm: compaction: Restart compaction from near where it left off > 6299702 mm: compaction: clear PG_migrate_skip based on compaction and reclaim activity > 0db63d7 mm: compaction: correct the nr_strict va isolated check for CMA > > Only Johannes' patch needs to be added to this list. kswapd is not woken > for THP in 3.6 but as it calls compaction for other high-order allocations > it still makes sense. Please identify "Johannes' patch"? -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>