Re: [PATCH v7 6/6] hostmem: Handle remapping of RAM

[Peter Xu <peterx@redhat.com>]

On Tue, Feb 04, 2025 at 07:55:52PM +0100, David Hildenbrand wrote:
> Ah, and now I remember where these 3 patches originate from: virtio-mem
> handling.
> 
> For virtio-mem I want to register also a remap handler, for example, to
> perform the custom preallocation handling.
> 
> So there will be at least two instances getting notified (memory backend,
> virtio-mem), and the per-ramblock one would have only allowed to trigger one
> (at least with a simple callback as we have today for ->resize).

I see, we can put something into commit log with such on decisions, then
we'll remember.

Said that, this still sounds like a per-ramblock thing, so instead of one
hook function we can also have per-ramblock notifier lists.

But I agree the perf issue isn't some immediate concern, so I'll leave that
to you and William.  If so I think we should discuss that in the commit log
too, so we decide to not care about perf until necessary (or we just make
it per-ramblock..).

Thanks,

-- 
Peter Xu