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authorBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>2012-10-08 16:32:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:22:45 +0900
commitd95ea5d18e699515468368415c93ed49b1a3221b (patch)
tree5e4828e1ad279462c64c08dd305905e610418d90 /mm/internal.h
parentd1ce749a0db12202b711d1aba1d29e823034648d (diff)
downloadlinux-d95ea5d18e699515468368415c93ed49b1a3221b.tar.bz2
cma: fix watermark checking
* Add ALLOC_CMA alloc flag and pass it to [__]zone_watermark_ok() (from Minchan Kim). * During watermark check decrease available free pages number by free CMA pages number if necessary (unmovable allocations cannot use pages from CMA areas). Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 8312d4fadf59..96cda4c6ac56 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -358,4 +358,18 @@ extern unsigned long vm_mmap_pgoff(struct file *, unsigned long,
extern void set_pageblock_order(void);
unsigned long reclaim_clean_pages_from_list(struct zone *zone,
struct list_head *page_list);
+/* The ALLOC_WMARK bits are used as an index to zone->watermark */
+#define ALLOC_WMARK_MIN WMARK_MIN
+#define ALLOC_WMARK_LOW WMARK_LOW
+#define ALLOC_WMARK_HIGH WMARK_HIGH
+#define ALLOC_NO_WATERMARKS 0x04 /* don't check watermarks at all */
+
+/* Mask to get the watermark bits */
+#define ALLOC_WMARK_MASK (ALLOC_NO_WATERMARKS-1)
+
+#define ALLOC_HARDER 0x10 /* try to alloc harder */
+#define ALLOC_HIGH 0x20 /* __GFP_HIGH set */
+#define ALLOC_CPUSET 0x40 /* check for correct cpuset */
+#define ALLOC_CMA 0x80 /* allow allocations from CMA areas */
+
#endif /* __MM_INTERNAL_H */