Re: calibrate_migration_costs takes ages on s390

[Ingo Molnar <mingo@elte.hu>]

* Ingo Molnar <mingo@elte.hu> wrote:

> * Heiko Carstens <heiko.carstens@de.ibm.com> wrote:
> 
> > --- a/arch/s390/lib/delay.c
> > +++ b/arch/s390/lib/delay.c
> > @@ -30,7 +30,7 @@ void __delay(unsigned long loops)
> >           */
> >          __asm__ __volatile__(
> >                  "0: brct %0,0b"
> > -                : /* no outputs */ : "r" (loops/2) );
> > +                : /* no outputs */ : "r" ((loops/2) + 1));
> >  }
> 
> ahh ... that explains the delays indeed!

just to make sure, i've checked all the other __delay() implementations 
in the kernel, and none seems to have such problems.

	Ingo