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Re: [PATCH 0/6] RfC: try improve native hotplug for pcie root ports

From: Michael S. Tsirkin
Subject: Re: [PATCH 0/6] RfC: try improve native hotplug for pcie root ports
Date: Thu, 11 Nov 2021 03:20:07 -0500

On Thu, Nov 11, 2021 at 08:53:06AM +0100, Gerd Hoffmann wrote:
>   Hi,
> > Given it's a bugfix, and given that I hear through internal channels
> > that QE results so far have been encouraging, I am inclined to bite the
> > bullet and merge this for -rc1.
> Fine with me.
> > I don't think this conflicts with Julia's patches as users can still
> > disable ACPI hotplug into bridges.  Gerd, agree?  Worth the risk?
> Combining this with Julia's patches looks a bit risky to me and surely
> needs testing.  I expect the problematic case is both native and acpi
> hotplug being enabled.
>  When the guest uses acpi hotplug nobody will
> turn on slot power on the pcie root port ...

I'm not sure I understand what the situation is, and how to trigger it.
Could you clarify pls?

> I'd suggest to just revert to pcie native hotplug for 6.2.

Hmm that kind of change seems even riskier to me. I think I'll try with
Igor's patches.

> Give acpi
> hotplug another try for 7.0, and post patches early in the devel cycle
> then instead of waiting until -rc0 is released.
> take care,
>   Gerd

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