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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 /lib/radix-tree.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 'lib/radix-tree.c')
-rw-r--r--lib/radix-tree.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 519d3f00ef9e..6b26f9d39800 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -98,7 +98,8 @@ radix_tree_node_alloc(struct radix_tree_root *root)
struct radix_tree_node *ret;
gfp_t gfp_mask = root_gfp_mask(root);
- ret = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
+ ret = kmem_cache_alloc(radix_tree_node_cachep,
+ set_migrateflags(gfp_mask, __GFP_RECLAIMABLE));
if (ret == NULL && !(gfp_mask & __GFP_WAIT)) {
struct radix_tree_preload *rtp;
@@ -142,7 +143,8 @@ int radix_tree_preload(gfp_t gfp_mask)
rtp = &__get_cpu_var(radix_tree_preloads);
while (rtp->nr < ARRAY_SIZE(rtp->nodes)) {
preempt_enable();
- node = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
+ node = kmem_cache_alloc(radix_tree_node_cachep,
+ set_migrateflags(gfp_mask, __GFP_RECLAIMABLE));
if (node == NULL)
goto out;
preempt_disable();

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