>>> Rik van Riel <r...@redhat.com> 12/27/12 4:01 PM >>> >On 12/27/2012 09:27 AM, Eric Dumazet wrote: >> So the hash sounds good to me, because the hash key could mix both lock >> address and caller IP ( __builtin_return_address(1) in >> ticket_spin_lock_wait()) > >The lock acquisition time depends on the holder of the lock, >and what the CPUs ahead of us in line will do with the lock, >not on the caller IP of the spinner.
The lock holder could supply its __builtin_return_address(0) for use in eventual hashing. Also, with all of this - did you evaluate the alternative of using monitor/mwait instead? Jan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/