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Commit b6ee8cd2 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Get rid of the nfs_rdata_mempool 



We don't need a mempool in order to guarantee reliable NFS read performance.

Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent fba73005

fs/nfs/read.c

+4 −13
Original line number Diff line number Diff line
@@ -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);

}