linux-kernel - Re: [RFC PATCH 0/3] generic hypercall support

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Message-ID: <20090506160712.GW3036@sequoia.sous-sol.org>
Date:	Wed, 6 May 2009 09:07:12 -0700
From:	Chris Wright <chrisw@...s-sol.org>
To:	Gregory Haskins <ghaskins@...ell.com>
Cc:	Chris Wright <chrisw@...s-sol.org>,
	Gregory Haskins <gregory.haskins@...il.com>,
	Avi Kivity <avi@...hat.com>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: Re: [RFC PATCH 0/3] generic hypercall support

* Gregory Haskins (ghaskins@...ell.com) wrote:
> Chris Wright wrote:
> > VF drivers can also have this issue (and typically use mmio).
> > I at least have a better idea what your proposal is, thanks for
> > explanation.  Are you able to demonstrate concrete benefit with it yet
> > (improved latency numbers for example)?
> 
> I had a test-harness/numbers for this kind of thing, but its a bit
> crufty since its from ~1.5 years ago.  I will dig it up, update it, and
> generate/post new numbers.

That would be useful, because I keep coming back to pio and shared
page(s) when think of why not to do this.  Seems I'm not alone in that.

thanks,
-chris
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