diff options
| author | Wei Wang <wei.w.wang@intel.com> | 2019-11-19 11:02:33 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-11-20 08:15:57 +0100 |
| commit | c9a6820fc0da2603be3054ee7590eb9f350508a7 (patch) | |
| tree | 5a10145a9b42125955879b8437c93448b2a12a4b | |
| parent | virtio_balloon: fix shrinker scan number of pages (diff) | |
| download | linux-c9a6820fc0da2603be3054ee7590eb9f350508a7.tar.xz linux-c9a6820fc0da2603be3054ee7590eb9f350508a7.zip | |
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>
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 51134f9a3ee7..e05679c478e2 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -826,7 +826,7 @@ static unsigned long virtio_balloon_shrinker_count(struct shrinker *shrinker, unsigned long count; count = vb->num_pages / VIRTIO_BALLOON_PAGES_PER_PAGE; - count += vb->num_free_page_blocks >> VIRTIO_BALLOON_FREE_PAGE_ORDER; + count += vb->num_free_page_blocks << VIRTIO_BALLOON_FREE_PAGE_ORDER; return count; } |