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authorNeilBrown <neilb@cse.unsw.edu.au>2005-06-23 22:03:01 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-24 00:06:29 -0700
commite60d4398a7c20fbe9c4a6cc39d7188ef9f65d2f1 (patch)
treed634acd73c61b04e873349eee638251fc433cd2c /fs/nfsd
parentc815afc73eeef089922449857ca4ed4d2e8950cb (diff)
downloadop-kernel-dev-e60d4398a7c20fbe9c4a6cc39d7188ef9f65d2f1.zip
op-kernel-dev-e60d4398a7c20fbe9c4a6cc39d7188ef9f65d2f1.tar.gz
[PATCH] nfsd4: slabify nfs4_files
The structures the server uses to keep track of various pieces of nfsv4 state (open files, outstanding delegations, etc.) are likely to be allocated and deallocated frequently and seem reasonable candidates for slab caches. While we're at it, the slab code keeps statistics that help catch leaks and such, so we may as well take this chance to eliminate some debugging counters that we've been keeping ourselves. Start with the struct nfs4_file. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c58
1 files changed, 34 insertions, 24 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 8ac0c9a..260c1cb 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -70,8 +70,6 @@ u32 list_add_perfile = 0;
u32 list_del_perfile = 0;
u32 add_perclient = 0;
u32 del_perclient = 0;
-u32 alloc_file = 0;
-u32 free_file = 0;
u32 vfsopen = 0;
u32 vfsclose = 0;
u32 alloc_delegation= 0;
@@ -90,6 +88,9 @@ static void release_stateid_lockowners(struct nfs4_stateid *open_stp);
*/
static DECLARE_MUTEX(client_sema);
+kmem_cache_t *stateowner_slab = NULL;
+kmem_cache_t *file_slab = NULL;
+
void
nfs4_lock_state(void)
{
@@ -961,14 +962,14 @@ alloc_init_file(struct inode *ino)
struct nfs4_file *fp;
unsigned int hashval = file_hashval(ino);
- if ((fp = kmalloc(sizeof(struct nfs4_file),GFP_KERNEL))) {
+ fp = kmem_cache_alloc(file_slab, GFP_KERNEL);
+ if (fp) {
INIT_LIST_HEAD(&fp->fi_hash);
INIT_LIST_HEAD(&fp->fi_perfile);
INIT_LIST_HEAD(&fp->fi_del_perfile);
list_add(&fp->fi_hash, &file_hashtbl[hashval]);
fp->fi_inode = igrab(ino);
fp->fi_id = current_fileid++;
- alloc_file++;
return fp;
}
return NULL;
@@ -992,29 +993,41 @@ release_all_files(void)
}
}
-kmem_cache_t *stateowner_slab = NULL;
-
-static int
-nfsd4_init_slabs(void)
+static void
+nfsd4_free_slab(kmem_cache_t **slab)
{
- stateowner_slab = kmem_cache_create("nfsd4_stateowners",
- sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
- if (stateowner_slab == NULL) {
- dprintk("nfsd4: out of memory while initializing nfsv4\n");
- return -ENOMEM;
- }
- return 0;
+ int status;
+
+ if (*slab == NULL)
+ return;
+ status = kmem_cache_destroy(*slab);
+ *slab = NULL;
+ WARN_ON(status);
}
static void
nfsd4_free_slabs(void)
{
- int status = 0;
+ nfsd4_free_slab(&stateowner_slab);
+ nfsd4_free_slab(&file_slab);
+}
- if (stateowner_slab)
- status = kmem_cache_destroy(stateowner_slab);
- stateowner_slab = NULL;
- BUG_ON(status);
+static int
+nfsd4_init_slabs(void)
+{
+ stateowner_slab = kmem_cache_create("nfsd4_stateowners",
+ sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL);
+ if (stateowner_slab == NULL)
+ goto out_nomem;
+ file_slab = kmem_cache_create("nfsd4_files",
+ sizeof(struct nfs4_file), 0, 0, NULL, NULL);
+ if (file_slab == NULL)
+ goto out_nomem;
+ return 0;
+out_nomem:
+ nfsd4_free_slabs();
+ dprintk("nfsd4: out of memory while initializing nfsv4\n");
+ return -ENOMEM;
}
void
@@ -1167,10 +1180,9 @@ release_stateid(struct nfs4_stateid *stp, int flags)
static void
release_file(struct nfs4_file *fp)
{
- free_file++;
list_del(&fp->fi_hash);
iput(fp->fi_inode);
- kfree(fp);
+ kmem_cache_free(file_slab, fp);
}
void
@@ -3286,8 +3298,6 @@ __nfs4_state_shutdown(void)
list_add_perfile, list_del_perfile);
dprintk("NFSD: add_perclient %d del_perclient %d\n",
add_perclient, del_perclient);
- dprintk("NFSD: alloc_file %d free_file %d\n",
- alloc_file, free_file);
dprintk("NFSD: vfsopen %d vfsclose %d\n",
vfsopen, vfsclose);
dprintk("NFSD: alloc_delegation %d free_delegation %d\n",
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