Re: [tip: irq/urgent] PCI/MSI: Mask MSI-X vectors only on success

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On Mon, Mar 14, 2022 at 01:04:55PM -0400, Dusty Mabe wrote:
> 
> 
> On 3/14/22 12:49, Stefan Roese wrote:
> 
> > I've added Dusty to Cc, as he (and others) already have been dealing
> > with this issue AFAICT.
> > 
> > Dusty, could you perhaps chime in with the latest status? AFAIU, it's
> > related to potential issues with the Xen version used on these systems?
> 
> Thanks Stefan,
> 
> Yes. My understanding is that the issue is because AWS is using older versions
> of Xen. They are in the process of updating their fleet to a newer version of
> Xen so the change introduced with Stefan's commit isn't an issue any longer.
> 
> I think the changes are scheduled to be completed in the next 10-12 weeks. For
> now we are carrying a revert in the Fedora Kernel.
> 
> You can follow this Fedora CoreOS issue if you'd like to know more about when
> the change lands in their backend. We work closely with one of their partner
> engineers and he keeps us updated. https://github.com/coreos/fedora-coreos-tracker/issues/1066
> 
> Dusty

Thanks for the link and explanation. What a fun coincidence that we hit this in
Flatcar Container Linux as well. We've reverted the commit in our kernels for
the time being, and will track that issue.

Thanks,
Jeremi



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