Commit bc4ba393 authored by Christoph Lameter's avatar Christoph Lameter Committed by Linus Torvalds
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[PATCH] drain_node_page(): Drain pages in batch units

drain_node_pages() currently drains the complete pageset of all pages.  If
there are a large number of pages in the queues then we may hold off
interrupts for too long.

Duplicate the method used in free_hot_cold_page.  Only drain pcp->batch
pages at one time.
Signed-off-by: default avatarChristoph Lameter <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent ebe29738
......@@ -685,9 +685,15 @@ void drain_node_pages(int nodeid)
pcp = &pset->pcp[i];
if (pcp->count) {
int to_drain;
free_pages_bulk(zone, pcp->count, &pcp->list, 0);
pcp->count = 0;
if (pcp->count >= pcp->batch)
to_drain = pcp->batch;
to_drain = pcp->count;
free_pages_bulk(zone, to_drain, &pcp->list, 0);
pcp->count -= to_drain;
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