free_hot_cold_page() is used for order == 0 pages, and is where the
page's zone is decided.
In the normal case, these pages are freed to the per-cpu lists. When a
page needs transplanting (ie: the actual node it belongs to has changed,
and it needs to be moved to another zone), the pcp lists are skipped &
the page is freed via free_one_page().
Signed-off-by: Cody P Schafer <c...@linux.vnet.ibm.com>
---
mm/page_alloc.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f8ae178..98ac7c6 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1357,6 +1357,7 @@ void mark_free_pages(struct zone *zone)
*/
void free_hot_cold_page(struct page *page, int cold)
{
+ int dest_nid;
struct zone *zone = page_zone(page);
struct per_cpu_pages *pcp;
unsigned long flags;
@@ -1370,6 +1371,15 @@ void free_hot_cold_page(struct page *page, int cold)
local_irq_save(flags);
__count_vm_event(PGFREE);
+ dest_nid = dnuma_page_needs_move(page);
+ if (dest_nid != NUMA_NO_NODE) {
+ struct zone *dest_zone = nid_zone(dest_nid, page_zonenum(page));
+ dnuma_prior_free_to_new_zone(page, 0, dest_zone, dest_nid);
+ free_one_page(dest_zone, page, 0, migratetype);
+ dnuma_post_free_to_new_zone(0);
+ goto out;
+ }
+
/*
* We only track unmovable, reclaimable and movable on pcp lists.
* Free ISOLATE pages back to the allocator because they are being
--
1.8.2.1
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