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

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Message-ID: <c4a65b9a-d1e2-bf0d-2519-aac7185931d5@redhat.com>
Date:   Mon, 14 Mar 2022 13:04:55 -0400
From:   Dusty Mabe <dustymabe@...hat.com>
To:     Stefan Roese <sr@...x.de>,
        Jeremi Piotrowski <jpiotrowski@...ux.microsoft.com>,
        linux-kernel@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Michal Simek <michal.simek@...inx.com>,
        Marek Vasut <marex@...x.de>, stable@...r.kernel.org,
        x86@...nel.org, maz@...nel.org
Subject: Re: [tip: irq/urgent] PCI/MSI: Mask MSI-X vectors only on success

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