mm: page_isolation: MIGRATE_CMA isolation functions added
This commit changes various functions that change pages and
pageblocks migrate type between MIGRATE_ISOLATE and
MIGRATE_MOVABLE in such a way as to allow to work with
MIGRATE_CMA migrate type.
Change-Id: Ib3a0b04cae49396b206a39bfced470e218ab1f90
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Tested-by: Rob Clark <rob.clark@linaro.org>
Tested-by: Ohad Ben-Cohen <ohad@wizery.com>
Tested-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Tested-by: Robert Nelson <robertcnelson@gmail.com>
Tested-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5eeace2..b424a55 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5593,7 +5593,7 @@
return ret;
}
-void unset_migratetype_isolate(struct page *page)
+void unset_migratetype_isolate(struct page *page, unsigned migratetype)
{
struct zone *zone;
unsigned long flags;
@@ -5601,8 +5601,8 @@
spin_lock_irqsave(&zone->lock, flags);
if (get_pageblock_migratetype(page) != MIGRATE_ISOLATE)
goto out;
- set_pageblock_migratetype(page, MIGRATE_MOVABLE);
- move_freepages_block(zone, page, MIGRATE_MOVABLE);
+ set_pageblock_migratetype(page, migratetype);
+ move_freepages_block(zone, page, migratetype);
out:
spin_unlock_irqrestore(&zone->lock, flags);
}
@@ -5680,6 +5680,10 @@
* alloc_contig_range() -- tries to allocate given range of pages
* @start: start PFN to allocate
* @end: one-past-the-last PFN to allocate
+ * @migratetype: migratetype of the underlaying pageblocks (either
+ * #MIGRATE_MOVABLE or #MIGRATE_CMA). All pageblocks
+ * in range must have the same migratetype and it must
+ * be either of the two.
*
* The PFN range does not have to be pageblock or MAX_ORDER_NR_PAGES
* aligned, however it's the caller's responsibility to guarantee that
@@ -5692,7 +5696,8 @@
* pages which PFN is in [start, end) are allocated for the caller and
* need to be freed with free_contig_range().
*/
-int alloc_contig_range(unsigned long start, unsigned long end)
+int alloc_contig_range(unsigned long start, unsigned long end,
+ unsigned migratetype)
{
struct zone *zone = page_zone(pfn_to_page(start));
unsigned long outer_start, outer_end;
@@ -5723,7 +5728,7 @@
*/
ret = start_isolate_page_range(pfn_max_align_down(start),
- pfn_max_align_up(end));
+ pfn_max_align_up(end), migratetype);
if (ret)
goto done;
@@ -5783,7 +5788,7 @@
done:
undo_isolate_page_range(pfn_max_align_down(start),
- pfn_max_align_up(end));
+ pfn_max_align_up(end), migratetype);
return ret;
}