netdev - [PATCH net-next] net: align gnet_stats_basic

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Message-Id: <20181116154329.247947-1-edumazet@google.com>
Date:   Fri, 16 Nov 2018 07:43:29 -0800
From:   Eric Dumazet <edumazet@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH net-next] net: align gnet_stats_basic_cpu struct

This structure is small (12 or 16 bytes depending on 64bit
or 32bit kernels), but we do not want it spanning two cache lines.

Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
 include/net/gen_stats.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/gen_stats.h b/include/net/gen_stats.h
index 946bd53a9f81dff5946579514360a9e5eaf3489b..ca23860adbb956fcfff3605068fdedf59073ce1a 100644
--- a/include/net/gen_stats.h
+++ b/include/net/gen_stats.h
@@ -10,7 +10,7 @@
 struct gnet_stats_basic_cpu {
 	struct gnet_stats_basic_packed bstats;
 	struct u64_stats_sync syncp;
-};
+} __aligned(2 * sizeof(u64));
 
 struct net_rate_estimator;
 
-- 
2.19.1.1215.g8438c0b245-goog