Re: [Xen-users] Applying an XSA, reboot of guests required?

[John Naggets <hostingnuggets@xxxxxxxxx>]

Thank you Andy for your answer that makes sense. I will wait next week
for the three other XSAs and reboot then...

Regards,
J.

On Wed, Jun 20, 2018 at 10:45 PM, Andy Smith <andy@xxxxxxxxxxxxxx> wrote:
> Hello,
>
> On Wed, Jun 20, 2018 at 09:57:07AM +0200, John Naggets wrote:
>> In my case I am using Debian 9, so is an apt-get update followed by an
>> apt-get upgrade enough or do I need to restart xen? and do I need to
>> restart my Xen guests (all Debian 9 PV guests)?
>
> Generally code in the hypervisor has changed so you need to reboot
> into the new hypervisor. Unless you have used live patching.
>
> Rebooting the hypervisor will obviously reboot dom0 and all other
> domains, although you could suspend+restore them, or migrate them
> away first.
>
> If there are fixes in the guest kernels then those will come as
> updated kernel packages and will obviously require a reboot of the
> guest into the new kernel, unless they too have been live patched.
>
> Note that a bunch of other XSAs come out of embargo on the 27th
> June.
>
>     https://xenbits.xen.org/xsa/
>
> Cheers,
> Andy
>
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