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| author | Mel Gorman <mel@csn.ul.ie> | 2007-10-16 01:25:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:00 -0700 |
| commit | e12ba74d8ff3e2f73a583500d7095e406df4d093 (patch) | |
| tree | a0d3385b65f0b3e1e00b0bbf11b75e7538a93edb /mm/slab.c | |
| parent | c361be55b3128474aa66d31092db330b07539103 (diff) | |
| download | lwn-e12ba74d8ff3e2f73a583500d7095e406df4d093.tar.gz lwn-e12ba74d8ff3e2f73a583500d7095e406df4d093.zip | |
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.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/slab.c b/mm/slab.c index 8fb56ae685de..e34bcb87a6ee 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) |