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| author | Eric Dumazet <edumazet@google.com> | 2015-02-20 06:48:57 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-21 21:59:57 -0500 |
| commit | b9ebafbe8cfeeddec881504c446cccd0d87a51b6 (patch) | |
| tree | bdae10b0c83047a55ed671b4d4d6ca7ebf26a2ab | |
| parent | a4176a9391868bfa87705bcd2e3b49e9b9dd2996 (diff) | |
| download | linux-b9ebafbe8cfeeddec881504c446cccd0d87a51b6.tar.bz2 | |
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>
| -rw-r--r-- | include/linux/rhashtable.h | 9 |
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); |