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authorChristoph Lameter <clameter@sgi.com>2008-04-28 02:12:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:17 -0700
commit488514d1798289f56f80ed018e246179fe500383 (patch)
treee68d9f703dcbceed0cc08b03014d109d7ec3acd4
parente92adcba261fd391591bb63c1703185a04a41554 (diff)
downloadblackbird-op-linux-488514d1798289f56f80ed018e246179fe500383.tar.gz
blackbird-op-linux-488514d1798289f56f80ed018e246179fe500383.zip
Remove set_migrateflags()
Migrate flags must be set on slab creation as agreed upon when the antifrag logic was reviewed. Otherwise some slabs of a slabcache will end up in the unmovable and others in the reclaimable section depending on which flag was active when a new slab page was allocated. This likely slid in somehow when antifrag was merged. Remove it. The buffer_heads are always allocated with __GFP_RECLAIMABLE because the SLAB_RECLAIM_ACCOUNT option is set. The set_migrateflags() never had any effect there. Radix tree allocations are not directly reclaimable but they are allocated with __GFP_RECLAIMABLE set on each allocation. We now set SLAB_RECLAIM_ACCOUNT on radix tree slab creation making sure that radix tree slabs are consistently placed in the reclaimable section. Radix tree slabs will also be accounted as such. There is then no user left of set_migratepages. So remove it. Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/buffer.c3
-rw-r--r--include/linux/gfp.h6
-rw-r--r--lib/radix-tree.c9
3 files changed, 5 insertions, 13 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 39ff14403d13..8b9807523efe 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3180,8 +3180,7 @@ static void recalc_bh_state(void)
struct buffer_head *alloc_buffer_head(gfp_t gfp_flags)
{
- struct buffer_head *ret = kmem_cache_alloc(bh_cachep,
- set_migrateflags(gfp_flags, __GFP_RECLAIMABLE));
+ struct buffer_head *ret = kmem_cache_alloc(bh_cachep, gfp_flags);
if (ret) {
INIT_LIST_HEAD(&ret->b_assoc_buffers);
get_cpu_var(bh_accounting).nr++;
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 164be9da3c1b..c17ba4945203 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h
@@ -144,12 +144,6 @@ static inline enum zone_type gfp_zone(gfp_t flags)
return base + ZONE_NORMAL;
}
-static inline gfp_t set_migrateflags(gfp_t gfp, gfp_t migrate_flags)
-{
- BUG_ON((gfp & GFP_MOVABLE_MASK) == GFP_MOVABLE_MASK);
- return (gfp & ~(GFP_MOVABLE_MASK)) | migrate_flags;
-}
-
/*
* There is only one page-allocator function, and two main namespaces to
* it. The alloc_page*() variants return 'struct page *' and as such
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 65f0e758ec38..bd521716ab1a 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -114,8 +114,7 @@ radix_tree_node_alloc(struct radix_tree_root *root)
}
}
if (ret == NULL)
- ret = kmem_cache_alloc(radix_tree_node_cachep,
- set_migrateflags(gfp_mask, __GFP_RECLAIMABLE));
+ ret = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
BUG_ON(radix_tree_is_indirect_ptr(ret));
return ret;
@@ -150,8 +149,7 @@ 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,
- set_migrateflags(gfp_mask, __GFP_RECLAIMABLE));
+ node = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
if (node == NULL)
goto out;
preempt_disable();
@@ -1098,7 +1096,8 @@ void __init radix_tree_init(void)
{
radix_tree_node_cachep = kmem_cache_create("radix_tree_node",
sizeof(struct radix_tree_node), 0,
- SLAB_PANIC, radix_tree_node_ctor);
+ SLAB_PANIC | SLAB_RECLAIM_ACCOUNT,
+ radix_tree_node_ctor);
radix_tree_init_maxindex();
hotcpu_notifier(radix_tree_callback, 0);
}
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