Re: [PATCH v16 0/9] mm / virtio: Provide support for free page reporting

Alexander Duyck
2020-01-15T23:08:49Z

On Fri, 2020-01-03 at 13:16 -0800, Alexander Duyck wrote:
> This series provides an asynchronous means of reporting free guest pages
> to a hypervisor so that the memory associated with those pages can be
> dropped and reused by other processes and/or guests on the host. Using
> this it is possible to avoid unnecessary I/O to disk and greatly improve
> performance in the case of memory overcommit on the host.

<snip>

>
> Changes from v15:
> https://lore.kernel.org/lkml/20191205161928.19548.41654.stgit@localhost.localdomain/
> Rebased on linux-next-20191219
> Split out patches for budget and moving head to last page processed
> Updated budget code to reduce how much memory is reported per pass
> Added logic to also rotate the list if we exit due a page isolation failure
> Added migratetype as argument in __putback_isolated_page

It's been about a week and a half since I posted the set and haven't
really gotten much feedback other than a suggestion of a slight tweak to
the titles for patches 7 & 8 to mention page_reporting. I'm mainly looking
for input on patches 3, 4, 7 and 8 since those are the ones that contain
most of the changes based on recent feedback.

I'm wondering if there is any remaining concerns or if these patches are
in a state where they are ready to be pulled into the MM tree?

Thanks.

- Alex