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Re: [Xen-devel] [v6][PATCH 2/2] xen:vtd: missing RMRR mapping while share EPT

On 2014/7/30 18:25, Jan Beulich wrote:
On 30.07.14 at 11:40, <tiejun.chen@xxxxxxxxx> wrote:
  From what those codes mean, it just return regardless whether they
really conflict. And this is just a good assumption, so if I'm
understanding this properly, actually our patches do this thing
precisely because we further check if this assumption is true, then take
necessary actions.

Except that the pointed out check prevents the code you modify
from being reached at all, i.e. as long as that check is there it
doesn't matter (for any passed through USB device) what action
rmrr_identity_mapping() takes.

Sorry, what do you mean?

From my point of view these two patches should be better than drop simply RMRR for any PT USB device no matter if its really necessary.


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