[Xen-devel] Re: Next steps with pv_ops for Xen

[Gerd Hoffmann <kraxel@xxxxxxxxxx>]

Stephen C. Tweedie wrote:
> Hi all,
> 
>   driver domains

Looked at the gntdev (grant table mappings for user space) driver,
noticed that one is not self-contained.  It needs a hook for page unmapping:

  http://xenbits.xensource.com/xen-3.1-testing.hg?rev/7180d2e61f92
  plus an s/ptep_get_and_clear_full/zap_pte/ fixup a few changesets
  later.

Upstreaming that one could become *uhm* intresting.  Nevertheless the
gntdev functionality is quite useful for writing pure userspace
backend drivers ...

cheers,
  Gerd

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