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From: Peter Maydell <peter.maydell@linaro.org>
Date: Wed, 19 Nov 2014 14:21:09 +0000
Message-ID: <CAFEAcA-qZ6nOboentqSMcEJ6OrCoFrQPhMCJfSeAOjjOAT72jA@mail.gmail.com>
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Subject: Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device,
	qemu_ram_resize
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To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>, QEMU Developers <qemu-devel@nongnu.org>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Juan Quintela <quintela@redhat.com>

On 19 November 2014 14:19, Paolo Bonzini <pbonzini@redhat.com> wrote:
> On 19/11/2014 15:10, Peter Maydell wrote:
>> Would it be feasible to just have the migration code provide
>> an API for registering things to be migrated in the live
>> migration stage, rather than creating memory regions which
>> you can't actually use for most of the purposes the memory
>> region API exists for?
>
> It does already, for example PPC uses it for its IOMMU tables.
>
> But in any case this is really just memory that is auto-resized on
> migration.  And it can work even if it is mapped in memory, as long as
> your resize callback (or some post_load code executed while migrating
> devices) does something useful to update the memory map.  Let's call it
> like what it is.

...so why all the "this isn't going to work in KVM" warnings
in the patchset?

thanks
-- PMM