[PATCH v1 0/3] virtio-balloon: Fixes + switch back to OOM handler

Two fixes for issues I stumbled over while working on patch #3.

Switch back to the good ol' OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM
as the switch to the shrinker introduce some undesired side effects. Keep
the shrinker in place to handle VIRTIO_BALLOON_F_FREE_PAGE_HINT.
Lengthy discussion under [1].

I tested with QEMU and "deflate-on-oom=on". Works as expected. Did not
test the shrinker for VIRTIO_BALLOON_F_FREE_PAGE_HINT, as it is
hard to trigger (only when migrating a VM, and even then, it might not
trigger).

[1] https://www.spinics.net/lists/linux-virtualization/msg40863.html

David Hildenbrand (3):
  virtio-balloon: Fix memory leak when unloading while hinting is in
    progress
  virtio_balloon: Fix memory leaks on errors in virtballoon_probe()
  virtio-balloon: Switch back to OOM handler for
    VIRTIO_BALLOON_F_DEFLATE_ON_OOM

 drivers/virtio/virtio_balloon.c | 124 +++++++++++++++-----------------
 1 file changed, 57 insertions(+), 67 deletions(-)

-- 
2.24.1