Subject: Re: VMI and kmap_atomic_pte paravirt_op
From: Ian Campbell <Ian.Campbell@citrix.com>
To: "akataria@vmware.com" <akataria@vmware.com>
CC: Jeremy Fitzhardinge <jeremy@goop.org>,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
       "H. Peter Anvin" <hpa@zytor.com>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
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	 <1267129930.10104.4.camel@ank32>
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Organization: Citrix Systems, Inc.
Date: Fri, 26 Feb 2010 09:04:32 +0000
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On Thu, 2010-02-25 at 20:32 +0000, Alok Kataria wrote:
> Hi Ian, 
> 
> On Thu, 2010-02-25 at 11:52 -0800, Ian Campbell wrote:
> > Hi Alok,
> > 
> > How critical is the vmi_kmap_atomic_pte pv_mmu_op hook to VMI? Is it
> > required for correct functionality or is it simply an optimisation?
> > 
> > We think we may be able to do away with the Xen version of the hook and
> > if VMI (which is deprecated) can live without it and you agree then I'll
> > cook up a patch to remove it altogether.
> 
> As Jeremy suggests we will be fine with disabling high ptes for VMI. 
> Thanks for doing this. 

OK, I'll do that.

Thanks,
Ian.


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