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Re: [PATCH v13 0/5] UFFD write-tracking migration/snapshots

From: Peter Xu
Subject: Re: [PATCH v13 0/5] UFFD write-tracking migration/snapshots
Date: Fri, 19 Feb 2021 17:47:19 -0500

On Fri, Feb 19, 2021 at 10:20:42PM +0100, David Hildenbrand wrote:
> > A shiver just went down my spine. Please don‘t just for the sake of 
> > creating a snapshot.
> > 
> > (Just imagine you don‘t have a shared zeropage...)
> ... and I just remembered we read all memory either way. Gah.
> I have some patches to make snapshots fly with virtio-mem so exactly that 
> won‘t happen. But they depend on vfio support, so it might take a while.

Sorry I can't really follow.

It'll be great if virtio-mem won't have similar problem with live snapshot
finally.  Is that idea applicable to balloon too, then?

Peter Xu

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