Commit b9ebafbe authored Feb 20, 2015 by Eric Dumazet Committed by David S. Miller Feb 21, 2015

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>

parent a4176a93

include/linux/rhashtable.h

+5 −4

Original line number	Diff line number	Diff line
		@@ -57,7 +57,8 @@ struct bucket_table {
		size_t size;
		unsigned int locks_mask;
		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);