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authorEric Dumazet <edumazet@google.com>2015-04-10 06:07:18 -0700
committerDavid S. Miller <davem@davemloft.net>2015-04-12 21:16:05 -0400
commit52db70dca5c206741f4f5c89410a2d32864f9840 (patch)
tree062b1d5355a19d40047ce39798bf38e9cfddeb7a /net
parent4e78eb0dbf867ccf206706ff2af34084f71a99bf (diff)
tcp: do not cache align timewait sockets
With recent adoption of skc_cookie in struct sock_common, struct tcp_timewait_sock size increased from 192 to 200 bytes on 64bit arches. SLAB rounds then to 256 bytes. It is time to drop SLAB_HWCACHE_ALIGN constraint for twsk_slab. This saves about 12 MB of memory on typical configuration reaching 262144 timewait sockets, and has no noticeable impact on performance. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/sock.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/net/core/sock.c b/net/core/sock.c
index 654e38a99759..e891bcf325ca 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2799,8 +2799,7 @@ int proto_register(struct proto *prot, int alloc_slab)
kmem_cache_create(prot->twsk_prot->twsk_slab_name,
prot->twsk_prot->twsk_obj_size,
0,
- SLAB_HWCACHE_ALIGN |
- prot->slab_flags,
+ prot->slab_flags,
NULL);
if (prot->twsk_prot->twsk_slab == NULL)
goto out_free_timewait_sock_slab_name;