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authorMel Gorman <mel@csn.ul.ie>2007-10-16 04:25:52 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 12:43:00 -0400
commite12ba74d8ff3e2f73a583500d7095e406df4d093 (patch)
treea0d3385b65f0b3e1e00b0bbf11b75e7538a93edb /mm/shmem.c
parentc361be55b3128474aa66d31092db330b07539103 (diff)
Group short-lived and reclaimable kernel allocations
This patch marks a number of allocations that are either short-lived such as network buffers or are reclaimable such as inode allocations. When something like updatedb is called, long-lived and unmovable kernel allocations tend to be spread throughout the address space which increases fragmentation. This patch groups these allocations together as much as possible by adding a new MIGRATE_TYPE. The MIGRATE_RECLAIMABLE type is for allocations that can be reclaimed on demand, but not moved. i.e. they can be migrated by deleting them and re-reading the information from elsewhere. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
-rw-r--r--mm/shmem.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index 855b93b3637c..76ecbac0d55b 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -95,9 +95,9 @@ static inline struct page *shmem_dir_alloc(gfp_t gfp_mask)
95 * BLOCKS_PER_PAGE on indirect pages, assume PAGE_CACHE_SIZE: 95 * BLOCKS_PER_PAGE on indirect pages, assume PAGE_CACHE_SIZE:
96 * might be reconsidered if it ever diverges from PAGE_SIZE. 96 * might be reconsidered if it ever diverges from PAGE_SIZE.
97 * 97 *
98 * __GFP_MOVABLE is masked out as swap vectors cannot move 98 * Mobility flags are masked out as swap vectors cannot move
99 */ 99 */
100 return alloc_pages((gfp_mask & ~__GFP_MOVABLE) | __GFP_ZERO, 100 return alloc_pages((gfp_mask & ~GFP_MOVABLE_MASK) | __GFP_ZERO,
101 PAGE_CACHE_SHIFT-PAGE_SHIFT); 101 PAGE_CACHE_SHIFT-PAGE_SHIFT);
102} 102}
103 103