Re: [PATCH v6 03/12] Retry fault before vmentry

[Avi Kivity]

 On 10/07/2010 07:21 PM, Gleb Natapov wrote:
> On Thu, Oct 07, 2010 at 02:29:07PM +0200, Avi Kivity wrote:
> >   On 10/04/2010 05:56 PM, Gleb Natapov wrote:
> >  >When page is swapped in it is mapped into guest memory only after guest
> >  >tries to access it again and generate another fault. To save this fault
> >  >we can map it immediately since we know that guest is going to access
> >  >the page. Do it only when tdp is enabled for now. Shadow paging case is
> >  >more complicated. CR[034] and EFER registers should be switched before
> >  >doing mapping and then switched back.
> >
> >  With non-pv apf, I don't think we can do shadow paging.  The guest
> Yes, with non-pv this trick will not work without tdp. I haven't even
> considered it for that case.

What about nnpt?  The same issues exist.

--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

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