diff options
| author |   Raushaniya Maksudova <rmaksudova@parallels.com> | 2014-11-10 09:35:29 +1030 |
|---|---|---|
| committer |   Rusty Russell <rusty@rustcorp.com.au> | 2014-11-11 17:09:57 +1030 |
| commit | 1fd9c67203af91977bf3b964ff3744cf74fc6f3f (patch) | |
| tree | b1ee69463f889e3d1669447021c7315e4ea143a2 /drivers/virtio/virtio_balloon.c | |
| parent | virtio_blk: fix race at module removal (diff) | |
| download | linux-dev-1fd9c67203af91977bf3b964ff3744cf74fc6f3f.tar.xz linux-dev-1fd9c67203af91977bf3b964ff3744cf74fc6f3f.zip | |
virtio_balloon: return the amount of freed memory from leak_balloon()
This value would be useful in the next patch to provide the amount of
the freed memory for OOM killer.
Signed-off-by: Raushaniya Maksudova <rmaksudova@parallels.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/virtio/virtio_balloon.c')
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index c9703d4d6f67..ff71fdcf3345 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -168,8 +168,9 @@ static void release_pages_by_pfn(const u32 pfns[], unsigned int num) } } -static void leak_balloon(struct virtio_balloon *vb, size_t num) +static unsigned leak_balloon(struct virtio_balloon *vb, size_t num) { + unsigned num_freed_pages; struct page *page; struct balloon_dev_info *vb_dev_info = &vb->vb_dev_info; @@ -186,6 +187,7 @@ static void leak_balloon(struct virtio_balloon *vb, size_t num) vb->num_pages -= VIRTIO_BALLOON_PAGES_PER_PAGE; } + num_freed_pages = vb->num_pfns; /* * Note that if * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST); @@ -195,6 +197,7 @@ static void leak_balloon(struct virtio_balloon *vb, size_t num) tell_host(vb, vb->deflate_vq); mutex_unlock(&vb->balloon_lock); release_pages_by_pfn(vb->pfns, vb->num_pfns); + return num_freed_pages; } static inline void update_stat(struct virtio_balloon *vb, int idx, |