linux-kernel - Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor.

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Message-Id: <200608030647.14159.ak@suse.de>
Date:	Thu, 3 Aug 2006 06:47:14 +0200
From:	Andi Kleen <ak@...e.de>
To:	Christoph Lameter <clameter@....com>
Cc:	virtualization@...ts.osdl.org, Zachary Amsden <zach@...are.com>,
	akpm@...l.org, xen-devel@...ts.xensource.com,
	Chris Wright <chrisw@...s-sol.org>,
	Ian Pratt <ian.pratt@...source.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 2/8] Implement always-locked bit ops, for memory shared with an SMP hypervisor.

On Thursday 03 August 2006 06:25, Christoph Lameter wrote:
> On Thu, 3 Aug 2006, Andi Kleen wrote:
> 
> > On Thursday 03 August 2006 03:25, Christoph Lameter wrote:
> > 
> > > Good idea. This will also make it easier to support this special 
> > > functionality. And it will avoid use in contexts where these are
> > > not necessary.
> > 
> > I think it's a bad idea. We don't want lots of architecture ifdefs
> > in some Xen specific file
> 
> Thats not how it would be done. We would do this with
> architecture specific xen files and a default in asm-generic.

It's cleaner to just do it in the generic code.

I think for most architectures it is only a one liner anyways if 
done properly.

-Andi
 
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