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authorMel Gorman <mel@csn.ul.ie>2010-05-25 01:32:26 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-05-25 19:06:59 +0400
commitc175a0ce7584e5b498fff8cbdb9aa7912aa9fbba (patch)
treedd924daef4a9e0ac9729c5b61c30b8e3cc96f971 /include/linux/swap.h
parentf1a5ab1210579e2d3ac8c0c227645823af5aafb0 (diff)
downloadlinux-c175a0ce7584e5b498fff8cbdb9aa7912aa9fbba.tar.xz
mm: move definition for LRU isolation modes to a header
Currently, vmscan.c defines the isolation modes for __isolate_lru_page(). Memory compaction needs access to these modes for isolating pages for migration. This patch exports them. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Christoph Lameter <cl@linux-foundation.org> Cc: Rik van Riel <riel@redhat.com> Cc: Minchan Kim <minchan.kim@gmail.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/swap.h')
-rw-r--r--include/linux/swap.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/swap.h b/include/linux/swap.h
index 600b03b7732e..1e8ce148d058 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -229,6 +229,11 @@ static inline void lru_cache_add_file(struct page *page)
__lru_cache_add(page, LRU_INACTIVE_FILE);
}
+/* LRU Isolation modes. */
+#define ISOLATE_INACTIVE 0 /* Isolate inactive pages. */
+#define ISOLATE_ACTIVE 1 /* Isolate active pages. */
+#define ISOLATE_BOTH 2 /* Isolate both active and inactive pages. */
+
/* linux/mm/vmscan.c */
extern unsigned long try_to_free_pages(struct zonelist *zonelist, int order,
gfp_t gfp_mask, nodemask_t *mask);