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Subject: Re: VMI and kmap_atomic_pte paravirt_op
From: Alok Kataria <akataria@vmware.com>
Reply-To: akataria@vmware.com
To: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
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Organization: VMware INC.
Date: Thu, 25 Feb 2010 12:32:10 -0800
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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. 

Alok
> 
> Thanks,
> Ian.
> 
>