diff options
| -rw-r--r-- | fs/nfsd/vfs.c | 59 |
1 files changed, 35 insertions, 24 deletions
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 1319e8027d5..aa1d0d6489a 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -83,7 +83,6 @@ struct raparm_hbucket { spinlock_t pb_lock; } ____cacheline_aligned_in_smp; -static struct raparms * raparml; #define RAPARM_HASH_BITS 4 #define RAPARM_HASH_SIZE (1<<RAPARM_HASH_BITS) #define RAPARM_HASH_MASK (RAPARM_HASH_SIZE-1) @@ -1966,11 +1965,20 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp, void nfsd_racache_shutdown(void) { - if (!raparml) - return; + struct raparms *raparm, *last_raparm; + unsigned int i; + dprintk("nfsd: freeing readahead buffers.\n"); - kfree(raparml); - raparml = NULL; + + for (i = 0; i < RAPARM_HASH_SIZE; i++) { + raparm = raparm_hash[i].pb_head; + while(raparm) { + last_raparm = raparm; + raparm = raparm->p_next; + kfree(last_raparm); + } + raparm_hash[i].pb_head = NULL; + } } /* * Initialize readahead param cache @@ -1981,35 +1989,38 @@ nfsd_racache_init(int cache_size) int i; int j = 0; int nperbucket; + struct raparms **raparm = NULL; - if (raparml) + if (raparm_hash[0].pb_head) return 0; - if (cache_size < 2*RAPARM_HASH_SIZE) - cache_size = 2*RAPARM_HASH_SIZE; - raparml = kcalloc(cache_size, sizeof(struct raparms), GFP_KERNEL); - - if (!raparml) { - printk(KERN_WARNING - "nfsd: Could not allocate memory read-ahead cache.\n"); - return -ENOMEM; - } + nperbucket = DIV_ROUND_UP(cache_size, RAPARM_HASH_SIZE); + if (nperbucket < 2) + nperbucket = 2; + cache_size = nperbucket * RAPARM_HASH_SIZE; dprintk("nfsd: allocating %d readahead buffers.\n", cache_size); - for (i = 0 ; i < RAPARM_HASH_SIZE ; i++) { - raparm_hash[i].pb_head = NULL; + + for (i = 0; i < RAPARM_HASH_SIZE; i++) { spin_lock_init(&raparm_hash[i].pb_lock); - } - nperbucket = DIV_ROUND_UP(cache_size, RAPARM_HASH_SIZE); - for (i = 0; i < cache_size - 1; i++) { - if (i % nperbucket == 0) - raparm_hash[j++].pb_head = raparml + i; - if (i % nperbucket < nperbucket-1) - raparml[i].p_next = raparml + i + 1; + + raparm = &raparm_hash[i].pb_head; + for (j = 0; j < nperbucket; j++) { + *raparm = kzalloc(sizeof(struct raparms), GFP_KERNEL); + if (!*raparm) + goto out_nomem; + raparm = &(*raparm)->p_next; + } + *raparm = NULL; } nfsdstats.ra_size = cache_size; return 0; + +out_nomem: + dprintk("nfsd: kmalloc failed, freeing readahead buffers\n"); + nfsd_racache_shutdown(); + return -ENOMEM; } #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) |