Re: [Xen-devel] Investigating a SLES11 guest crash

[George Dunlap <George.Dunlap@xxxxxxxxxxxxx>]

On Fri, Sep 13, 2013 at 12:50 PM, Andrew Cooper
<andrew.cooper3@xxxxxxxxxx> wrote:
> On 13/09/2013 12:34, Andrew Bennieston wrote:
>> On 13/09/13 12:14, Sander Eikelenboom wrote:
>>> Not by any chance running a 3.12 merge window kernel ?
>> Nope, the regular SLES11 SP0 2.6.27 kernel.
>
> Some thinks should be pointed out.
>
> This crash is because the guest takes a pagefault before setting up a
> pagefault handler.
>
> 9 times in 10, the guest boots perfectly well.
>
> This crash is *only* visible with a debug build of Xen, and is a
> regression from 4.1
>
> The point of this query is to find out whether there is a bug in the
> identified Xen changeset, or whether it simply exposed some other bug.

AIUI, the purpose of this changeset was to expose, on <5TiB machines,
bugs that would normally only happen in 5<x<16TiB machines.  So it is
likely to be the latter.

 -George

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