[RFC PATCH v2 14/25] page_alloc: use dnuma to transplant newly freed pages in __free_pages_ok()

[Cody P Schafer]

__free_pages_ok() handles higher order (order != 0) pages. Transplant
hook is added here as this is where the struct zone to free to is
decided.

Signed-off-by: Cody P Schafer <c...@linux.vnet.ibm.com>
---
 mm/page_alloc.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4628443..f8ae178 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -59,6 +59,7 @@
 #include <linux/migrate.h>
 #include <linux/page-debug-flags.h>
 #include <linux/sched/rt.h>
+#include <linux/dnuma.h>
 
 #include <asm/tlbflush.h>
 #include <asm/div64.h>
@@ -732,6 +733,13 @@ static void __free_pages_ok(struct page *page, unsigned 
int order)
 {
        unsigned long flags;
        int migratetype;
+       int dest_nid = dnuma_page_needs_move(page);
+       struct zone *zone;
+
+       if (dest_nid != NUMA_NO_NODE)
+               zone = nid_zone(dest_nid, page_zonenum(page));
+       else
+               zone = page_zone(page);
 
        if (!free_pages_prepare(page, order))
                return;
@@ -740,7 +748,11 @@ static void __free_pages_ok(struct page *page, unsigned 
int order)
        __count_vm_events(PGFREE, 1 << order);
        migratetype = get_pageblock_migratetype(page);
        set_freepage_migratetype(page, migratetype);
-       free_one_page(page_zone(page), page, order, migratetype);
+       if (dest_nid != NUMA_NO_NODE)
+               dnuma_prior_free_to_new_zone(page, order, zone, dest_nid);
+       free_one_page(zone, page, order, migratetype);
+       if (dest_nid != NUMA_NO_NODE)
+               dnuma_post_free_to_new_zone(order);
        local_irq_restore(flags);
 }
 
-- 
1.8.2.1

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