Re: FAILED: patch "[PATCH] virtio_balloon: fix shrinker count" failed to apply to 4.19-stable tree

[Sasha Levin <sashal@kernel.org>]

On Mon, Nov 25, 2019 at 06:44:42PM +0100, gregkh@linuxfoundation.org wrote:
>
>The patch below does not apply to the 4.19-stable tree.
>If someone wants it applied there, or to any other stable or longterm
>tree, then please email the backport, including the original git commit
>id to <stable@vger.kernel.org>.
>
>thanks,
>
>greg k-h
>
>------------------ original commit in Linus's tree ------------------
>
>From c9a6820fc0da2603be3054ee7590eb9f350508a7 Mon Sep 17 00:00:00 2001
>From: Wei Wang <wei.w.wang@intel.com>
>Date: Tue, 19 Nov 2019 05:02:33 -0500
>Subject: [PATCH] virtio_balloon: fix shrinker count
>
>Instead of multiplying by page order, virtio balloon divided by page
>order. The result is that it can return 0 if there are a bit less
>than MAX_ORDER - 1 pages in use, and then shrinker scan won't be called.
>
>Cc: stable@vger.kernel.org
>Fixes: 71994620bb25 ("virtio_balloon: replace oom notifier with shrinker")
>Signed-off-by: Wei Wang <wei.w.wang@intel.com>
>Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
>Reviewed-by: David Hildenbrand <david@redhat.com>

I think that the fixes tag should be pointing to 86a559787e6f
("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT"), and this commit
isn't needed on 4.19.

-- 
Thanks,
Sasha