Re: [PATCH] Bugfix for VMI paravirt ops

Jeremy Fitzhardinge
2007-04-06T00:15:16Z

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.

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.

J