When setting MIGRATETYPE_ISOLATE on a pageblock, pcplists are drained to have a better chance that all pages will be successfully isolated and not left in the per-cpu caches. Since isolation is always concerned with a single zone, we can reduce the pcplists drain to the single zone, which is now possible.
The change should make memory isolation faster and not disturbing unrelated pcplists anymore. Signed-off-by: Vlastimil Babka <[email protected]> Cc: Naoya Horiguchi <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Yasuaki Ishimatsu <[email protected]> Cc: Zhang Yanfei <[email protected]> Cc: Xishi Qiu <[email protected]> Cc: Vladimir Davydov <[email protected]> Cc: Joonsoo Kim <[email protected]> --- mm/page_isolation.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_isolation.c b/mm/page_isolation.c index a57f082..3c49ef0 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -67,7 +67,7 @@ out: spin_unlock_irqrestore(&zone->lock, flags); if (!ret) - drain_all_pages(NULL); + drain_all_pages(zone); return ret; } -- 1.8.4.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
