Re: [Xen-devel] pcie error containment: kill domain and dm without xend

[Elena Ufimtseva <ufimtseva@xxxxxxxxx>]

Thanks George!


On Fri, Jun 24, 2016 at 4:37 AM, George Dunlap <george.dunlap@xxxxxxxxxx> wrote:
> On Wed, Jun 22, 2016 at 9:16 PM, Elena Ufimtseva <ufimtseva@xxxxxxxxx> wrote:
>> Hello
>>
>> I am working on PCIe errors containment and XSA-124 relevant problem.
>> This is only small part of the problem and I can provide more details later
>> if that is of someone's interest.
>> As the temporary solution, guest domain with passthrough device
>> without SRIOV  gets killed when certain AER errors are triggered by
>> dom0 AER code.
>> In versions of xen with xend present, xenwatch can be used and pciback can
>> write some fields to xenstore (as "aerfail" which is already present)
>> and destroy device model and then domain itself.
>> What would be the best way to initiate similar behaviour when xend is
>> not used? Or maybe what is the best way to initiate device model
>> destruction and domain itself without xend?
>
> xl forks a background process per VM to monitor VMs and destroy device
> models at the appropriate times -- see
> tools/xl_cmdimpl.c:create_domain() (and in particular search for
> "need_daemon").  This is the place to implement VM-watching features
> such as xend had.
>
>  -George



-- 
Elena

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