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| author | Eric Dumazet <edumazet@google.com> | 2015-04-10 06:07:18 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-04-12 21:16:05 -0400 |
| commit | 52db70dca5c206741f4f5c89410a2d32864f9840 (patch) | |
| tree | 062b1d5355a19d40047ce39798bf38e9cfddeb7a /net/core/sock.c | |
| parent | 4e78eb0dbf867ccf206706ff2af34084f71a99bf (diff) | |
| download | linux-52db70dca5c206741f4f5c89410a2d32864f9840.tar.gz linux-52db70dca5c206741f4f5c89410a2d32864f9840.tar.bz2 linux-52db70dca5c206741f4f5c89410a2d32864f9840.zip | |
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/core/sock.c')
| -rw-r--r-- | net/core/sock.c | 3 |
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; |