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Commit 8a8bc40d authored by Jeff Layton's avatar Jeff Layton Committed by J. Bruce Fields
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nfsd: create a dedicated slabcache for DRC entries 



Currently we use kmalloc() which wastes a little bit of memory on each
allocation since it's a power of 2 allocator. Since we're allocating a
1024 of these now, and may need even more later, let's create a new
slabcache for them.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 09662d58

fs/nfsd/nfscache.c

+13 −2
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
static struct hlist_head *	cache_hash;

static struct list_head 	lru_head;

static int			cache_disabled = 1;

static struct kmem_cache	*drc_slab;



/*

 * Calculate the hash index from an XID.
@@ -51,10 +52,15 @@ int nfsd_reply_cache_init(void) 
	struct svc_cacherep	*rp;

	int			i;



	drc_slab = kmem_cache_create("nfsd_drc", sizeof(struct svc_cacherep),

					0, 0, NULL);

	if (!drc_slab)

		goto out_nomem;



	INIT_LIST_HEAD(&lru_head);

	i = CACHESIZE;

	while (i) {

		rp = kmalloc(sizeof(*rp), GFP_KERNEL);

		rp = kmem_cache_alloc(drc_slab, GFP_KERNEL);

		if (!rp)

			goto out_nomem;

		list_add(&rp->c_lru, &lru_head);
@@ -85,13 +91,18 @@ void nfsd_reply_cache_shutdown(void) 
		if (rp->c_state == RC_DONE && rp->c_type == RC_REPLBUFF)

			kfree(rp->c_replvec.iov_base);

		list_del(&rp->c_lru);

		kfree(rp);

		kmem_cache_free(drc_slab, rp);

	}



	cache_disabled = 1;



	kfree (cache_hash);

	cache_hash = NULL;



	if (drc_slab) {

		kmem_cache_destroy(drc_slab);

		drc_slab = NULL;

	}

}



/*