[Xen-ia64-devel] Re: PATCH: vpsr handling cleanup

[Tristan Gingold <tgingold@xxxxxxx>]

On Mon, May 07, 2007 at 03:35:40PM -0600, Alex Williamson wrote:
> On Mon, 2007-05-07 at 06:32 +0200, Tristan Gingold wrote:
> > Hi,
> > 
> > this is a noop patch: just create a function which really returns the 
> > virtual
> > psr and create a new function to set psr for delivering an interrupt.
> 
> Hi Tristan,
> 
>    It doesn't seem like quite a noop.  I'm seeing a pretty significant
> performance hit as seen by a parallel kernel build in an SMP PV domain
> (on the order of 20%).  I can provide more details if you're unable to
> reproduce.  Thanks,
Ok, I will rework it!

Tristan.

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