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mm: page_isolation: MIGRATE_CMA isolation functions added

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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.

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>
This commit is contained in:
Michal Nazarewicz
2012-04-03 15:06:15 +02:00
committed by Marek Szyprowski
parent 47118af076
commit 0815f3d81d
6 changed files with 34 additions and 27 deletions
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17
mm/page_alloc.c
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@@ -5582,7 +5582,7 @@ out:
return ret;
}
void unset_migratetype_isolate(struct page *page)
void unset_migratetype_isolate(struct page *page, unsigned migratetype)
{
struct zone *zone;
unsigned long flags;
@@ -5590,8 +5590,8 @@ void unset_migratetype_isolate(struct page *page)
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);
}
@@ -5669,6 +5669,10 @@ static int __alloc_contig_migrate_range(unsigned long start, unsigned long end)
* 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
@@ -5681,7 +5685,8 @@ static int __alloc_contig_migrate_range(unsigned long start, unsigned long end)
* 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;
@@ -5712,7 +5717,7 @@ int alloc_contig_range(unsigned long start, unsigned long end)
*/
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;
@@ -5772,7 +5777,7 @@ int alloc_contig_range(unsigned long start, unsigned long end)
done:
undo_isolate_page_range(pfn_max_align_down(start),
pfn_max_align_up(end));
pfn_max_align_up(end), migratetype);
return ret;
}