Re: [PATCH 2/2] powerpc: implement arch_scale_smt_power for Power7

[Joel Schopp]

Benjamin Herrenschmidt wrote:
> On Wed, 2010-01-20 at 16:09 -0600, Joel Schopp wrote:
>   
> > I can turn that into a conditional branch (case statement) with a shift 
> > for the common 1,2,4 cases which should cover all procs available today 
> > falling back to a divide for any theoretical future processors that do 
> > other numbers of threads. 
> >     
>
> Look at the cputhreads.h implementation ... Today we only support
> power-of-two numbers of threads.
>   
I've run 3 threads using cpu hotplug to offline 1 of the 4.  It's 
certainly a stupid idea, but there you go.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/