From: Eric Dumazet <[EMAIL PROTECTED]> Date: Fri, 9 Feb 2007 18:44:16 +0100
> In a prior patch, I introduced a sk_hash field (__sk_common.skc_hash) to let > tcp lookups use one cache line per unmatched entry instead of two. > > We can also use sk_hash to speedup UDP part as well. We store in sk_hash the > hnum value, and use sk->sk_hash (same cache line than 'next' pointer), > instead of inet->num (different cache line) > > Note : We still have a false sharing problem for SMP machines, because > sock_hold(sock) dirties the cache line containing the 'next' pointer. Not > counting the udp_hash_lock rwlock. (did someone mentioned RCU ? :) ) > > Signed-off-by: Eric Dumazet <[EMAIL PROTECTED]> Applied, thanks Eric. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
