Re: [PATCH] Bugfix for VMI paravirt ops

[Zachary Amsden]

Jeremy Fitzhardinge wrote:
> Zachary Amsden wrote:
>   
> > No, they are totally dependent.  The reason interrupts are disabled is
> > to stop kmap_atomic in interrupt handlers.  With the kmap_atomic_pte
> > changes, the whole interrupt disable jibberish goes away. 
> >     
>
> But kmap_atomic_pte is a special case of kmap_atomic for ptes. 
> Interrupt routines can still use plain kmap_atomic for bouncebuffers and
> so on.
>   

Ah, yes.

> A more general patch would be to make kmap/unmap_atomic pv_ops, and then
> they can all be rolled together.  I.e: check the type to see if special
> pte handling needs to happen, etc.
>   

So the clean fix for this is still even further out.  I don't think I 
want to hook kmap/unmap as paravirt-ops.

Zach
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