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Re: [Xen-devel] live migration fails (assert in shadow_hash_delete)

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] live migration fails (assert in shadow_hash_delete)
From: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
Date: Tue, 23 Feb 2010 17:05:04 +0000
Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, Ashish Bijlani <ashish.bijlani@xxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Devdutt Patnaik <xendevid@xxxxxxxxx>
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Keir Fraser writes ("Re: [Xen-devel] live migration fails (assert in 
shadow_hash_delete)"):
> Localhost migrations were just added to the automated tests. But I think
> maybe they are trivially failing due to trying to do them via the 'xl'
> interface, which doesn't support it(!). Ian?

Localhost migration does work in most combinations in our tests.  It
was only recently added and there are a few teething troubles with it
so I don't have a full slate of results.

It doesn't work at all with libxl because it's not implemented.

Keir:
> A quick manual test indicates it's very easy to get Xen to blow up. I got
> the following on my first localhost live migration attempt, which is a
> different looking crash in the shadow code. This is with 2.6.18 dom0 and
> domU by the way, so it's not pv_ops tickling the hypervisor in an unexpected
> way...

2.6.18 doesn't boot on my test hardware so I'm just building it, not
running it.  So I haven't reproduced your test, which explains the
different results.

Ian.

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