On Fri, Apr 08, 2005 at 07:33:58AM +0400, Evgeniy Polyakov wrote: > On Fri, 2005-04-08 at 12:59 +1000, Herbert Xu wrote: > > Evgeniy Polyakov <[EMAIL PROTECTED]> wrote: > > > > > > atomic_dec_and_test() is more expensive than 2 barriers + atomic_dec(), > > > but in case of connector I think the price is not so high. > > > > Can you list the platforms on which this is true? > > sparc64, some mips [at least in UP].
Are you sure? The implementations of atomic_sub and atomic_sub_return (which correspond to atomic_dec and atomic_dec_and_test) seem to be comparable in cost on those two architectures. Perhaps Dave can clarify for us about sparc64? Cheers, -- Visit Openswan at http://www.openswan.org/ Email: Herbert Xu ~{PmV>HI~} <[EMAIL PROTECTED]> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt - 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/
