[PATCH] update irq affinity mask when migrating irqs

Olof Johansson olof at austin.ibm.com
Wed Mar 9 10:43:54 EST 2005

On Tue, Mar 08, 2005 at 11:20:33AM -0600, Joel Schopp wrote:

> The downside of calling this is it increases the path length and causes 
>  ibm_get_xive to be called again.  Usually slightly slower is a fine 
> tradeoff for more readable code, but in this case I would have left it 
> how it was.  With all the cpus stopped it is best to be as fast as 

Is CPU removal really that performance critical a path? How long does
a ibm_get_xive call take?

> possible.  Maybe this is still fast enough, but you'd have to test under 
> heavy load on a variety of systems to be sure.

Please define "fast enough".


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