> >
> > 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 from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
