Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1fd9c672 authored by Raushaniya Maksudova's avatar Raushaniya Maksudova Committed by Rusty Russell
Browse files

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: default avatarRaushaniya Maksudova <rmaksudova@parallels.com>
Signed-off-by: default avatarDenis V. Lunev <den@openvz.org>
CC: Rusty Russell <rusty@rustcorp.com.au>
CC: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 46652a86

drivers/virtio/virtio_balloon.c

+4 −1
Original line number Diff line number Diff line
@@ -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,