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

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

At 11:01 +0000 on 24 Feb (1267009267), Keir Fraser wrote:
> On 24/02/2010 09:31, "Ashish Bijlani" <ashish.bijlani@xxxxxxxxx> wrote:
> 
> > Any ideas how to fix this prob?
> > 
> > Is live migration not stable enough with xen-4.0 (rc4) yet?
> 
> Tim Deegan's kindly offered to investigate this ahead of rc5.

For the curious:

The bug seems to have come in between 4.0.0 rc1 (20789) and 20822.
Bisecting between those is more fun because PV domain creation and migration
were broken in libxc then.  Reverting 20808 (the only cset there that
touches the shadow code) doesn't fix the problem.

Selective backporting yesterday seemed to blame 20812 ("xend: NUMA: fix
division by zero on unpopulated nodes"), which seems unlikely.  I'll dig
further.

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, XenServer Engineering
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

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