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Re: [RFC v8 0/5] memory: Delete assertion in memory_region_unregister_io

From: Peter Xu
Subject: Re: [RFC v8 0/5] memory: Delete assertion in memory_region_unregister_iommu_notifier
Date: Tue, 1 Sep 2020 17:13:57 -0400

On Tue, Sep 01, 2020 at 04:26:03PM +0200, Eugenio Pérez wrote:
> I am able to hit this assertion when a Red Hat 7 guest virtio_net device
> raises an "Invalidation" of all the TLB entries. This happens in the
> guest's startup if 'intel_iommu=on' argument is passed to the guest
> kernel and right IOMMU/ATS devices are declared in qemu's command line.

Thanks for working on this, Eugenio!  Sorry to let the original one-liner patch
grow into a patchset... :)

I think it at least looks very good to me in general, besides another trivial
comment on patch 4.

Peter Xu

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