From e010487dbe09d63cf916fd1b119d17abd0f48207 Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Tue, 16 Oct 2007 01:25:53 -0700 Subject: Group high-order atomic allocations In rare cases, the kernel needs to allocate a high-order block of pages without sleeping. For example, this is the case with e1000 cards configured to use jumbo frames. Migrating or reclaiming pages in this situation is not an option. This patch groups these allocations together as much as possible by adding a new MIGRATE_TYPE. The MIGRATE_HIGHATOMIC type are exactly what they sound like. Care is taken that pages of other migrate types do not use the same blocks as high-order atomic allocations. Signed-off-by: Mel Gorman Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mmzone.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include/linux/mmzone.h') diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 4721e9aa3ced..a8140a9a65e8 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -37,11 +37,13 @@ #define MIGRATE_UNMOVABLE 0 #define MIGRATE_RECLAIMABLE 1 #define MIGRATE_MOVABLE 2 -#define MIGRATE_TYPES 3 +#define MIGRATE_HIGHATOMIC 3 +#define MIGRATE_TYPES 4 #else #define MIGRATE_UNMOVABLE 0 #define MIGRATE_UNRECLAIMABLE 0 #define MIGRATE_MOVABLE 0 +#define MIGRATE_HIGHATOMIC 0 #define MIGRATE_TYPES 1 #endif -- cgit v1.2.3-59-g8ed1b