Add support for defragging files via btrfsctl -d. Avoid OOM on extent tree
defrag.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 8ad6f8e..33f7a18 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -10,6 +10,12 @@
#include <linux/blkdev.h>
#include "extent_map.h"
+/* temporary define until extent_map moves out of btrfs */
+struct kmem_cache *btrfs_cache_create(const char *name, size_t size,
+ unsigned long extra_flags,
+ void (*ctor)(void *, struct kmem_cache *,
+ unsigned long));
+
static struct kmem_cache *extent_map_cache;
static struct kmem_cache *extent_state_cache;
@@ -32,14 +38,12 @@
void __init extent_map_init(void)
{
- extent_map_cache = kmem_cache_create("extent_map",
- sizeof(struct extent_map), 0,
- SLAB_RECLAIM_ACCOUNT |
+ extent_map_cache = btrfs_cache_create("extent_map",
+ sizeof(struct extent_map),
SLAB_DESTROY_BY_RCU,
NULL);
- extent_state_cache = kmem_cache_create("extent_state",
- sizeof(struct extent_state), 0,
- SLAB_RECLAIM_ACCOUNT |
+ extent_state_cache = btrfs_cache_create("extent_state",
+ sizeof(struct extent_state),
SLAB_DESTROY_BY_RCU,
NULL);
}