We don't need a mempool in order to guarantee reliable NFS read performance.
Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx>
---
fs/nfs/read.c | 17 ++++-------------
1 files changed, 4 insertions(+), 13 deletions(-)
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index fd58e90..8b48ec6 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -35,16 +35,13 @@ static const struct rpc_call_ops nfs_read_partial_ops;
static const struct rpc_call_ops nfs_read_full_ops;
static struct kmem_cache *nfs_rdata_cachep;
-static mempool_t *nfs_rdata_mempool;
-
-#define MIN_POOL_READ (32)
struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
{
- struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, GFP_KERNEL);
+ struct nfs_read_data *p;
+ p = kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL);
if (p) {
- memset(p, 0, sizeof(*p));
INIT_LIST_HEAD(&p->pages);
p->npages = pagecount;
if (pagecount <= ARRAY_SIZE(p->page_array))
@@ -52,7 +49,7 @@ struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
else {
p->pagevec = kcalloc(pagecount, sizeof(struct page *), GFP_KERNEL);
if (!p->pagevec) {
- mempool_free(p, nfs_rdata_mempool);
+ kmem_cache_free(nfs_rdata_cachep, p);
p = NULL;
}
}
@@ -64,7 +61,7 @@ void nfs_readdata_free(struct nfs_read_data *p)
{
if (p && (p->pagevec != &p->page_array[0]))
kfree(p->pagevec);
- mempool_free(p, nfs_rdata_mempool);
+ kmem_cache_free(nfs_rdata_cachep, p);
}
void nfs_readdata_release(struct nfs_read_data *rdata)
@@ -716,16 +713,10 @@ int __init nfs_init_readpagecache(void)
if (nfs_rdata_cachep == NULL)
return -ENOMEM;
- nfs_rdata_mempool = mempool_create_slab_pool(MIN_POOL_READ,
- nfs_rdata_cachep);
- if (nfs_rdata_mempool == NULL)
- return -ENOMEM;
-
return 0;
}
void nfs_destroy_readpagecache(void)
{
- mempool_destroy(nfs_rdata_mempool);
kmem_cache_destroy(nfs_rdata_cachep);
}
--
1.7.6.4
--
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