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authorEric Dumazet <edumazet@google.com>2015-02-20 17:48:57 +0300
committerDavid S. Miller <davem@davemloft.net>2015-02-22 05:59:57 +0300
commitb9ebafbe8cfeeddec881504c446cccd0d87a51b6 (patch)
treebdae10b0c83047a55ed671b4d4d6ca7ebf26a2ab /include
parenta4176a9391868bfa87705bcd2e3b49e9b9dd2996 (diff)
downloadlinux-b9ebafbe8cfeeddec881504c446cccd0d87a51b6.tar.xz
rhashtable: ensure cache line alignment on bucket_table
struct bucket_table contains mostly read fields : size, locks_mask, locks. Make sure these are not sharing a cache line with buckets[] Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/rhashtable.h9
1 files changed, 5 insertions, 4 deletions
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index 58851275fed9..cb2104be2135 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -54,10 +54,11 @@ struct rhash_head {
* @buckets: size * hash buckets
*/
struct bucket_table {
- size_t size;
- unsigned int locks_mask;
- spinlock_t *locks;
- struct rhash_head __rcu *buckets[];
+ size_t size;
+ unsigned int locks_mask;
+ spinlock_t *locks;
+
+ struct rhash_head __rcu *buckets[] ____cacheline_aligned_in_smp;
};
typedef u32 (*rht_hashfn_t)(const void *data, u32 len, u32 seed);