Messages in this thread |  | | | Date | Mon, 21 Nov 2011 16:59:36 -0500 | | From | Rik van Riel <> | | Subject | Re: [PATCH 5/8] mm: compaction: avoid overwork in migrate sync mode |
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On 11/19/2011 02:54 PM, Andrea Arcangeli wrote: > Add a lightweight sync migration (sync == 2) mode that avoids overwork > so more suitable to be used by compaction to provide lower latency but
> --- a/mm/compaction.c > +++ b/mm/compaction.c > @@ -552,7 +552,7 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) > nr_migrate = cc->nr_migratepages; > err = migrate_pages(&cc->migratepages, compaction_alloc, > (unsigned long)cc, false, > - cc->sync); > + cc->sync ? 2 : 0);
Great idea, but it would be good if these numbers got a symbolic name so people trying to learn the code can figure it out a little easier.
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