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| author | T Makphaibulchoke <tmac@hp.com> | 2014-03-19 00:24:49 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-03-19 00:24:49 +0100 |
| commit | 9c191f701ce9f9bc604e88a5dc69cd943daa5d3b (patch) | |
| tree | 2e7a0ffa25f89e6dab1719deeb6a710405517afc /fs/mbcache.c | |
| parent | fs/mbcache.c: doucple the locking of local from global data (diff) | |
| download | linux-9c191f701ce9f9bc604e88a5dc69cd943daa5d3b.tar.xz linux-9c191f701ce9f9bc604e88a5dc69cd943daa5d3b.zip | |
ext4: each filesystem creates and uses its own mb_cache
This patch adds new interfaces to create and destory cache,
ext4_xattr_create_cache() and ext4_xattr_destroy_cache(), and remove
the cache creation and destory calls from ex4_init_xattr() and
ext4_exitxattr() in fs/ext4/xattr.c.
fs/ext4/super.c has been changed so that when a filesystem is mounted
a cache is allocated and attched to its ext4_sb_info structure.
fs/mbcache.c has been changed so that only one slab allocator is
allocated and used by all mbcache structures.
Signed-off-by: T. Makphaibulchoke <tmac@hp.com>
Diffstat (limited to 'fs/mbcache.c')
| -rw-r--r-- | fs/mbcache.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/fs/mbcache.c b/fs/mbcache.c index 786ecab81c99..bf166e388f0d 100644 --- a/fs/mbcache.c +++ b/fs/mbcache.c @@ -99,6 +99,7 @@ static DECLARE_WAIT_QUEUE_HEAD(mb_cache_queue); static struct blockgroup_lock *mb_cache_bg_lock; +static struct kmem_cache *mb_cache_kmem_cache; MODULE_AUTHOR("Andreas Gruenbacher <a.gruenbacher@computer.org>"); MODULE_DESCRIPTION("Meta block cache (for extended attributes)"); @@ -351,11 +352,14 @@ mb_cache_create(const char *name, int bucket_bits) goto fail; for (n=0; n<bucket_count; n++) INIT_HLIST_BL_HEAD(&cache->c_index_hash[n]); - cache->c_entry_cache = kmem_cache_create(name, - sizeof(struct mb_cache_entry), 0, - SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); - if (!cache->c_entry_cache) - goto fail2; + if (!mb_cache_kmem_cache) { + mb_cache_kmem_cache = kmem_cache_create(name, + sizeof(struct mb_cache_entry), 0, + SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); + if (!mb_cache_kmem_cache) + goto fail2; + } + cache->c_entry_cache = mb_cache_kmem_cache; /* * Set an upper limit on the number of cache entries so that the hash @@ -476,6 +480,10 @@ mb_cache_destroy(struct mb_cache *cache) atomic_read(&cache->c_entry_count)); } + if (list_empty(&mb_cache_list)) { + kmem_cache_destroy(mb_cache_kmem_cache); + mb_cache_kmem_cache = NULL; + } kfree(cache->c_index_hash); kfree(cache->c_block_hash); kfree(cache); |