commit d4ad4d22e7ac6b8711b35d7e86eb29f03f8ac153
author Nikolay Aleksandrov <nikolay@redhat.com> Fri Aug 01 12:29:48 2014 +0200
committer David S. Miller <davem@davemloft.net> Sat Aug 02 15:31:31 2014 -0700
tree 929ebb9bc76b52037572bfb58475112989b51ba0
parent 2e404f632f44979ddf0ce0808a438249a72d7015

inet: frags: use kmem_cache for inet_frag_queue

Use kmem_cache to allocate/free inet_frag_queue objects since they're
all the same size per inet_frags user and are alloced/freed in high volumes
thus making it a perfect case for kmem_cache.

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/inet_fragment.c

diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index 4baa76c..9eb89f3 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -198,7 +198,7 @@
 		schedule_work(&f->frags_work);
 }
 
-void inet_frags_init(struct inet_frags *f)
+int inet_frags_init(struct inet_frags *f)
 {
 	int i;
 
@@ -213,6 +213,12 @@
 
 	seqlock_init(&f->rnd_seqlock);
 	f->last_rebuild_jiffies = 0;
+	f->frags_cachep = kmem_cache_create(f->frags_cache_name, f->qsize, 0, 0,
+					    NULL);
+	if (!f->frags_cachep)
+		return -ENOMEM;
+
+	return 0;
 }
 EXPORT_SYMBOL(inet_frags_init);
 
@@ -225,6 +231,7 @@
 void inet_frags_fini(struct inet_frags *f)
 {
 	cancel_work_sync(&f->frags_work);
+	kmem_cache_destroy(f->frags_cachep);
 }
 EXPORT_SYMBOL(inet_frags_fini);
 
@@ -327,7 +334,7 @@
 
 	if (f->destructor)
 		f->destructor(q);
-	kfree(q);
+	kmem_cache_free(f->frags_cachep, q);
 }
 EXPORT_SYMBOL(inet_frag_destroy);
 
@@ -377,7 +384,7 @@
 		return NULL;
 	}
 
-	q = kzalloc(f->qsize, GFP_ATOMIC);
+	q = kmem_cache_zalloc(f->frags_cachep, GFP_ATOMIC);
 	if (q == NULL)
 		return NULL;