From: Andy Grover <andy.grover@oracle.com>
Date: Wed, 7 Jul 2010 23:46:26 +0000 (-0700)
Subject: RDS/IB: Use SLAB_HWCACHE_ALIGN flag for kmem_cache_create()
X-Git-Tag: v2.6.37-rc1~147^2~499^2~16
X-Git-Url: http://bbs.cooldavid.org/git/?a=commitdiff_plain;h=c20f5b9633bb0953bd2422f0f1430a2028cdbd0a;p=net-next-2.6.git

RDS/IB: Use SLAB_HWCACHE_ALIGN flag for kmem_cache_create()

We are *definitely* counting cycles as closely as DaveM, so
ensure hwcache alignment for our recv ring control structs.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
---

diff --git a/net/rds/ib_recv.c b/net/rds/ib_recv.c
index 9c4208f6b45..37dab2898ad 100644
--- a/net/rds/ib_recv.c
+++ b/net/rds/ib_recv.c
@@ -1051,13 +1051,13 @@ int __init rds_ib_recv_init(void)
 
 	rds_ib_incoming_slab = kmem_cache_create("rds_ib_incoming",
 					sizeof(struct rds_ib_incoming),
-					0, 0, NULL);
+					0, SLAB_HWCACHE_ALIGN, NULL);
 	if (!rds_ib_incoming_slab)
 		goto out;
 
 	rds_ib_frag_slab = kmem_cache_create("rds_ib_frag",
 					sizeof(struct rds_page_frag),
-					0, 0, NULL);
+					0, SLAB_HWCACHE_ALIGN, NULL);
 	if (!rds_ib_frag_slab)
 		kmem_cache_destroy(rds_ib_incoming_slab);
 	else