> > > > I guess this one would mitigate against Vlastmil's migration scanner issue, > > wouldn't it? > Nope, I wanted to see if free pages are low enough. > Please no, that's a wrong fix. The purpose of compaction is to make the > high-order watermark meet, not give up. > Yupe, have to spin. --- a/mm/compaction.c Sun Nov 9 12:02:59 2014 +++ b/mm/compaction.c Mon Nov 10 11:12:07 2014 @@ -1074,6 +1074,8 @@ static int compact_finished(struct zone watermark = low_wmark_pages(zone); watermark += (1 << cc->order); + if (!zone_watermark_ok(zone, 0, watermark, 0, 0)) + return COMPACT_SKIPPED; if (!zone_watermark_ok(zone, cc->order, watermark, 0, 0)) return COMPACT_CONTINUE; -- -- 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>