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Subject[RFC PATCH 11/12] mm: add the PCP interface
Add the PCP interface for address range mirroring feature.

Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
---
mm/page_alloc.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0fb55288..cf3b7cb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1401,11 +1401,16 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
unsigned long count, struct list_head *list,
int migratetype, bool cold)
{
- int i;
+ int i, mt;

spin_lock(&zone->lock);
for (i = 0; i < count; ++i) {
- struct page *page = __rmqueue(zone, order, migratetype);
+ struct page *page;
+
+ if (is_migrate_mirror(migratetype))
+ page = __rmqueue_smallest(zone, order, migratetype);
+ else
+ page = __rmqueue(zone, order, migratetype);
if (unlikely(page == NULL))
break;

@@ -1423,9 +1428,14 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
else
list_add_tail(&page->lru, list);
list = &page->lru;
- if (is_migrate_cma(get_freepage_migratetype(page)))
+
+ mt = get_freepage_migratetype(page);
+ if (is_migrate_cma(mt))
__mod_zone_page_state(zone, NR_FREE_CMA_PAGES,
-(1 << order));
+ if (is_migrate_mirror(mt))
+ __mod_zone_page_state(zone, NR_FREE_MIRROR_PAGES,
+ -(1 << order));
}
__mod_zone_page_state(zone, NR_FREE_PAGES, -(i << order));
spin_unlock(&zone->lock);
--
2.0.0



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