[Cbe-oss-dev] [PATCH 3:3] spusched: Fix spu interrupt routing

[Christoph Hellwig]

On Thu, Apr 24, 2008 at 08:04:11PM -0300, Luke Browning wrote:
> Fix spu interrupt routing
> 
> Route mfc interrupts to the cpu where the controlling thread last ran
> provided that cpu is on the same node as the spu.  Otherwise don't 
> reroute interrupts.  Code previously routed to the current cpu which could 
> may have been on a remote node.  In the case of time slicing all spu 
> interrupts were routed to the same cpu.  This should improve performance 
> and provide a more predictable environment for processing spu exceptions.  
> In the past we have seen concurrent delivery of spu exceptions to 
> two cpus. This eliminates that concern. 

Looks good to me.  It would be nice to avoid the cpumask calculations
on every affinity set, but I can't think of a nice way to do that.