Re: [Xen-devel] Xen4.2 S3 regression?

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 09.08.12 at 18:09, Ben Guthro <ben@xxxxxxxxxx> wrote:
> iommu=no-intremap
> This seems to work around the issue on this platform, performing
> multiple suspend/resume cycles, and ahci came back afterwards just
> fine.
> 
> What is the downside to flipping this off?

Loss of security (against misbehaving/malicious guests). So we
certainly want/need to get to the bottom of this (especially if
this is not only one kind of system that's affected).

> iommu=off
> This test behaved similarly to the above, also working around the issue.

Of course, this is a superset of the former.

This result, however, makes it more likely again to indeed be a
Xen side problem, not Dom0 induced corruption.

Jan


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