Re: [RFC PATCH] virtio_balloon: add VIRTIO_BALLOON_F_REPORTING_PM_SAFE feature bit

Link Lin <[email protected]> Thu, 6 Aug 2026 15:45:25 -0700

Newsgroups	dev.linux.lists.virtualization,org.kernel.vger.linux-kernel,org.kernel.vger.stable,org.kvack.linux-mm
Message-ID	<CALUx4KS-xRf7m3jPDN5BKfFrpbojp9+0czRp5-siFed-Jj1G1A@mail.gmail.com>

Hi all,

Following up on this RFC to see if anyone has had a chance to look it over.

We'd appreciate any high-level feedback on whether using a dedicated feature
bit (or a similar protocol-level handshake) is a viable path forward for
safe hypervisor deployment, or if there is an alternative approach the
maintainers would prefer.

Thanks,
Link

On Wed, Jul 29, 2026 at 7:52 PM Link Lin <[email protected]> wrote:
>
> Hi all,
>
> Friendly ping on this RFC.
>
> We'd love your feedback on whether using a new feature bit
> (VIRTIO_BALLOON_F_REPORTING_PM_SAFE) to negotiate PM suspend safety is
> acceptable, or if you have concerns about protocol-level handshakes for
> kernel PM fix states.
>
> If you prefer an alternative approach for safe fleet deployment, please let
> us know. Thank you!
>
> Sincerely,
> Link