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 <vbabka@xxxxxxx> Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxx> Cc: Rik van Riel <riel@xxxxxxxxxx> Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> Cc: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx> Cc: Xishi Qiu <qiuxishi@xxxxxxxxxx> Cc: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> --- 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, 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>