On Mon, Nov 25, 2019 at 06:44:42PM +0100, gregkh@xxxxxxxxxxxxxxxxxxx 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@xxxxxxxxxxxxxxx>.
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@xxxxxxxxx>
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@xxxxxxxxxxxxxxx
Fixes: 71994620bb25 ("virtio_balloon: replace oom notifier with shrinker")
Signed-off-by: Wei Wang <wei.w.wang@xxxxxxxxx>
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
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
