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Re: [Xen-ia64-devel] PATCH: rewrite vcpu_get_psr

To: Tristan Gingold <tgingold@xxxxxxx>
Subject: Re: [Xen-ia64-devel] PATCH: rewrite vcpu_get_psr
From: Alex Williamson <alex.williamson@xxxxxx>
Date: Fri, 11 May 2007 11:37:26 -0600
Cc: Xen-ia64-devel <xen-ia64-devel@xxxxxxxxxxxxxxxxxxx>
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On Fri, 2007-05-11 at 07:22 +0200, Tristan Gingold wrote:
> On Thu, May 10, 2007 at 02:15:34PM -0600, Alex Williamson wrote:
> > On Wed, 2007-05-09 at 06:10 +0200, Tristan Gingold wrote:
> > > Hi,
> > > 
> > > a stripped-down version of a previous patch: reimplement vcpu_get_psr.
> > > 
> > > Should be a noop, I don't think performance should be affected.
> > 
> > Unfortunately...
> It's a little bit puzzling.  I didn't think the performace of mov =psr.l was
> to important!

   Yeah, I switched back and forth a couple times because I couldn't
quite believe it killed performance that much.

> Have you tested my other patch ?  It should be independant from this one.

   No, it may not functionally depend on the get_psr patch, but it
doesn't apply cleanly without it.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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