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authorMel Gorman <mel@csn.ul.ie>2007-10-16 01:25:52 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:00 -0700
commite12ba74d8ff3e2f73a583500d7095e406df4d093 (patch)
treea0d3385b65f0b3e1e00b0bbf11b75e7538a93edb /mm/slab.c
parentc361be55b3128474aa66d31092db330b07539103 (diff)
downloadop-kernel-dev-e12ba74d8ff3e2f73a583500d7095e406df4d093.zip
op-kernel-dev-e12ba74d8ff3e2f73a583500d7095e406df4d093.tar.gz
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/slab.c')
-rw-r--r--mm/slab.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 8fb56ae..e34bcb8 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1643,6 +1643,8 @@ static void *kmem_getpages(struct kmem_cache *cachep, gfp_t flags, int nodeid)
#endif
flags |= cachep->gfpflags;
+ if (cachep->flags & SLAB_RECLAIM_ACCOUNT)
+ flags |= __GFP_RECLAIMABLE;
page = alloc_pages_node(nodeid, flags, cachep->gfporder);
if (!page)
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