17.10.2012 17:44, Eric Dumazet пишет:
On Wed, 2012-10-17 at 17:18 +0400, Stanislav Kinsbursky wrote:+static int hash(struct signal_struct *sig, unsigned int nr) +{ + int hash = hash_ptr(sig, POSIX_TIMERS_HASH_BITS); + return hash ^ hash_32(nr, POSIX_TIMERS_HASH_BITS); +} +This is quite expensive on 64 bit arches. I suggest instead : return hash_32(hash32_ptr(sig) ^ nr, POSIX_TIMERS_HASH_BITS);
I'm not familiar with hashing costs, so sure, I'll update. -- Best regards, Stanislav Kinsbursky -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
