diff options
| author | Vandana Salve <vsalve@nvidia.com> | 2014-06-10 15:10:04 +0530 |
|---|---|---|
| committer | Riham Haidar <rhaidar@nvidia.com> | 2014-06-11 17:09:55 -0700 |
| commit | e032a2e8d2604e150cb610562c3c457b91050d56 (patch) | |
| tree | 7999fa5a48802e055fc09893e814001725144fcb /mm/internal.h | |
| parent | 0e7370ef6597150986099c837b26ccb526f1ac4a (diff) | |
mm: get_user_pages: migrate out CMA pages when FOLL_DURABLE flag is set
When __get_user_pages() is called with FOLL_DURABLE flag,
ensure that no page in CMA pageblocks gets locked.
This workarounds the permanent migration failures caused
by locking the pages by get_user_pages() call for a long
period of time.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
bug 1517584
Change-Id: I11b7c87e78f1022d6fded85a1ed6bac73c5f0a7c
Signed-off-by: Vandana Salve <vsalve@nvidia.com>
Reviewed-on: http://git-master/r/421678
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Diffstat (limited to 'mm/internal.h')
| -rw-r--r-- | mm/internal.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h index 8562de0a5197..a290d04fb084 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -105,6 +105,18 @@ extern void prep_compound_page(struct page *page, unsigned long order); extern bool is_free_buddy_page(struct page *page); #endif +#ifdef CONFIG_CMA +static inline int is_cma_page(struct page *page) +{ + unsigned mt = get_pageblock_migratetype(page); + if (mt == MIGRATE_ISOLATE || mt == MIGRATE_CMA) + return true; + return false; +} +#else +#define is_cma_page(page) 0 +#endif + #if defined CONFIG_COMPACTION || defined CONFIG_CMA /* |