RE: [Xen-devel] CONFIG_SMP or !CONFIG_SMP... that is the question. WAS:something about ia64 that nobody would read :-)

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> > I'd vote for expunging CONFIG_SMP.
> 
> I've heard its not uncommon when debugging nasty problems on 
> Linux to turn off SMP as it simplifies the world considerably.

Seting maxcpus=1 has basically the same dynamic effect. The only point
of having the build option is to reduce the number of LOCK'ed
operations.

Ian
 
> I'm not sure this same argument applies to Xen, but there's 
> enough kernel hackers on this list that I thought it would be 
> interesting to open this up for discussion.
> 
> Granted, turning off SMP on Xen/x86 doesn't even compile 
> right now, but that should be fixable.
> 
> So... opinions anyone?  Is keeping CONFIG_SMP (potentially) 
> useful or not?
> 
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