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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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18
include/linux/page-isolation.h
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@@ -3,7 +3,7 @@
/*
* Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
* If specified range includes migrate types other than MOVABLE,
* If specified range includes migrate types other than MOVABLE or CMA,
* this will fail with -EBUSY.
*
* For isolating all pages in the range finally, the caller have to
@@ -11,27 +11,27 @@
* test it.
*/
extern int
start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
unsigned migratetype);
/*
* Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
* target range is [start_pfn, end_pfn)
*/
extern int
undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
unsigned migratetype);
/*
* test all pages in [start_pfn, end_pfn)are isolated or not.
* Test all pages in [start_pfn, end_pfn) are isolated or not.
*/
extern int
test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
/*
* Internal funcs.Changes pageblock's migrate type.
* Please use make_pagetype_isolated()/make_pagetype_movable().
* Internal functions. Changes pageblock's migrate type.
*/
extern int set_migratetype_isolate(struct page *page);
extern void unset_migratetype_isolate(struct page *page);
extern void unset_migratetype_isolate(struct page *page, unsigned migratetype);
#endif