Re: [PATCH v18 QEMU 2/3] virtio-balloon: Add support for providing free page reports to host

[David Hildenbrand]

On 09.04.20 00:55, Alexander Duyck wrote:
> From: Alexander Duyck <address@hidden>
> 
> Add support for the page reporting feature provided by virtio-balloon.
> Reporting differs from the regular balloon functionality in that is is
> much less durable than a standard memory balloon. Instead of creating a
> list of pages that cannot be accessed the pages are only inaccessible
> while they are being indicated to the virtio interface. Once the
> interface has acknowledged them they are placed back into their respective
> free lists and are once again accessible by the guest system.
> 
> Unlike a standard balloon we don't inflate and deflate the pages. Instead
> we perform the reporting, and once the reporting is completed it is
> assumed that the page has been dropped from the guest and will be faulted
> back in the next time the page is accessed.
> 
> This patch is a subset of the UAPI patch that was submitted for the Linux
> kernel. The original patch can be found at:
> https://lore.kernel.org/lkml/20200211224657.29318.68624.stgit@localhost.localdomain/

You don't need all these comments.

Usually we do

"linux-headers: update to contain virito-balloon free page reporting

Let's sync the latest upstream changes for free page reporting. To be
replaced by a full linux header sync.

Signed-off-by: Alexander Duyck <address@hidden>
"

mst will replace this by a full header sync (if necessary) when sending
it upstream

-- 
Thanks,

David / dhildenb