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rhashtable: ensure cache line alignment on bucket_table

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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>
This commit is contained in:
Eric Dumazet 2015-02-20 06:48:57 -08:00 committed by David S. Miller
parent a4176a9391
commit b9ebafbe8c
1 changed files with 5 additions and 4 deletions
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9
include/linux/rhashtable.h
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@ -54,10 +54,11 @@ struct rhash_head {
* @buckets: size * hash buckets * @buckets: size * hash buckets
*/ */
struct bucket_table { struct bucket_table {
size_t size; size_t size;
unsigned int locks_mask; unsigned int locks_mask;
spinlock_t *locks; spinlock_t *locks;
struct rhash_head __rcu *buckets[];
struct rhash_head __rcu *buckets[] ____cacheline_aligned_in_smp;
}; };
typedef u32 (*rht_hashfn_t)(const void *data, u32 len, u32 seed); typedef u32 (*rht_hashfn_t)(const void *data, u32 len, u32 seed);