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| author | Christoph Lameter <clameter@sgi.com> | 2006-12-06 20:33:02 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:23 -0800 |
| commit | bc4ba393c007248f76c05945abb7b7b892cdd1cc (patch) | |
| tree | 3c2cf7e13ecf991c58ffc00617757fcdeb3d863f /mm/page_alloc.c | |
| parent | ebe29738f3934ad6a93c8bd76e30aa5d797a269d (diff) | |
| download | lwn-bc4ba393c007248f76c05945abb7b7b892cdd1cc.tar.gz lwn-bc4ba393c007248f76c05945abb7b7b892cdd1cc.zip | |
[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: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index a840e702722c..86f2984f8b79 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -685,9 +685,15 @@ void drain_node_pages(int nodeid) pcp = &pset->pcp[i]; if (pcp->count) { + int to_drain; + local_irq_save(flags); - free_pages_bulk(zone, pcp->count, &pcp->list, 0); - pcp->count = 0; + if (pcp->count >= pcp->batch) + to_drain = pcp->batch; + else + to_drain = pcp->count; + free_pages_bulk(zone, to_drain, &pcp->list, 0); + pcp->count -= to_drain; local_irq_restore(flags); } } |