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Btrfs: use a slab for the free space entries

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Since we alloc/free free space entries a whole lot, lets use a slab to keep
track of them.  This makes some of my tests slightly faster.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik
2011-01-28 17:05:48 -05:00
parent 57a45ced94
commit dc89e98244
3 changed files with 29 additions and 16 deletions
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10
fs/btrfs/inode.c
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@@ -50,6 +50,7 @@
#include "tree-log.h"
#include "compression.h"
#include "locking.h"
#include "free-space-cache.h"
struct btrfs_iget_args {
u64 ino;
@@ -70,6 +71,7 @@ static struct kmem_cache *btrfs_inode_cachep;
struct kmem_cache *btrfs_trans_handle_cachep;
struct kmem_cache *btrfs_transaction_cachep;
struct kmem_cache *btrfs_path_cachep;
struct kmem_cache *btrfs_free_space_cachep;
#define S_SHIFT 12
static unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = {
@@ -6761,6 +6763,8 @@ void btrfs_destroy_cachep(void)
kmem_cache_destroy(btrfs_transaction_cachep);
if (btrfs_path_cachep)
kmem_cache_destroy(btrfs_path_cachep);
if (btrfs_free_space_cachep)
kmem_cache_destroy(btrfs_free_space_cachep);
}
int btrfs_init_cachep(void)
@@ -6789,6 +6793,12 @@ int btrfs_init_cachep(void)
if (!btrfs_path_cachep)
goto fail;
btrfs_free_space_cachep = kmem_cache_create("btrfs_free_space_cache",
sizeof(struct btrfs_free_space), 0,
SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
if (!btrfs_free_space_cachep)
goto fail;
return 0;
fail:
btrfs_destroy_cachep();