Re: [Xen-devel] Is: Xen 4.2 and using 'xl' to save/restore is buggy with PVHVM Linux guests (v3.10 and v3.11 and presumarily earlier as well). Works with Xen 4.3 and Xen 4.4. Was:Re: FAILURE 3.11.0-rc7upstream(x86_64) 3.11.0-rc7upstream(i386)\: 2013-08-26 (tst001)

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Tue, Aug 27, 2013 at 2:54 PM, Konrad Rzeszutek Wilk
<konrad.wilk@xxxxxxxxxx> wrote:
> After a bit of digging I found out that Xen 4.2 'xl' (but not 'xm')
> has some badness in it. When "migrating" ('xl' save followed by 'xl' restore')
> the PVHVM guests (and only PVHVM) end up dying. The best theory I came up
> with is that they don't have the shared_info setup correctly as the guest
> is not receiving any events.

[snip]

> Once more I need to stress that it works great when using 'xm' in Xen 4.2
> but fails over when using 'xl' in Xen 4.2.
>
> I can't recall whether 'xl' in Xen 4.2 was considered experiemental or
> production ready at that point?

I'm pretty sure in 4.2 xl was the favored toolstack -- it was only 4.1
in which we considered it experimental.

This works in 4.3, though?  Maybe there was a fix that didn't get backported?

Ian J, do we test PVHVM suspend/resume in osstest?

 -George

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