lkml.org 
[lkml]   [2005]   [Apr]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [Fwd: Re: connector is missing in 2.6.12-rc2-mm1]
From
On Fri, Apr 08, 2005 at 07:52:34AM +0400, Evgeniy Polyakov wrote:
> On Fri, 2005-04-08 at 13:32 +1000, Herbert Xu wrote:
> > 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 <johnpol@2ka.mipt.ru> 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.
>
> mips has additional sync.

But atomic_dec + 2 barries is going to do the sync as well, no?

Cheers,
--
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
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 majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-04-08 05:55    [W:0.063 / U:11.748 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site