Re: [cpuops cmpxchg double V2 1/4] Generic support forthis_cpu_cmpxchg_double

From: Christoph Lameter
Date: Fri Feb 25 2011 - 11:44:00 EST

On Fri, 25 Feb 2011, Tejun Heo wrote:

> On Fri, Feb 25, 2011 at 10:26:43AM -0600, Christoph Lameter wrote:
> > On Fri, 25 Feb 2011, Tejun Heo wrote:
> >
> > > > Ping? The current situation is that we're unable to merge a
> > > > perfectly good SLUB performance optimization because we can't seem
> > > > to agree on the this_cpu_cmpxchg_double() API.
> > >
> > > I thought cl was preparing new version of the patchset. Christoph?
> >
> > In order to do that I would have to see a way to improve the
> > patches. None of the suggestions so far seem to be realizable.
> I see. For some reason, I thought you and hpa agreed on something and
> you were writing up the patches. I'll read the thread again. Let's
> just pick one. It's not like this is an API which will be used
> througout the tree.

We were discussing some hypothetical changes but as far as I can see all
those scenarios lead to more issues.

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