Messages in this thread Patch in this message | | | From | Alexander Atanasov <> | Subject | [PATCH v1 2/2] Drivers: virtio: balloon: Report inflated memory | Date | Tue, 9 Aug 2022 12:53:58 +0300 |
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Update the value in page_alloc on balloon fill/leak.
Cc: David Hildenbrand <david@redhat.com> Cc: Wei Liu <wei.liu@kernel.org> Cc: Nadav Amit <namit@vmware.com>
Signed-off-by: Alexander Atanasov <alexander.atanasov@virtuozzo.com> --- drivers/virtio/virtio_balloon.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
Firts user, other balloons i will do if it is accepted to avoid too much emails.
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index b9737da6c4dd..e2693ffbd48b 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -208,6 +208,16 @@ static void set_page_pfns(struct virtio_balloon *vb, page_to_balloon_pfn(page) + i); } +static void update_meminfo(struct virtio_balloon *vb) +{ + long inflated_kb = vb->num_pages << (VIRTIO_BALLOON_PFN_SHIFT - 10); + + if (virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_DEFLATE_ON_OOM)) + inflated_kb = -inflated_kb; + + atomic_long_set(&mem_balloon_inflated_kb, inflated_kb); +} + static unsigned int fill_balloon(struct virtio_balloon *vb, size_t num) { unsigned int num_allocated_pages; @@ -250,6 +260,7 @@ static unsigned int fill_balloon(struct virtio_balloon *vb, size_t num) } num_allocated_pages = vb->num_pfns; + update_meminfo(vb); /* Did we get any? */ if (vb->num_pfns != 0) tell_host(vb, vb->inflate_vq); @@ -296,6 +307,7 @@ static unsigned int leak_balloon(struct virtio_balloon *vb, size_t num) } num_freed_pages = vb->num_pfns; + update_meminfo(vb); /* * Note that if * virtio_has_feature(vdev, VIRTIO_BALLOON_F_MUST_TELL_HOST); @@ -1089,6 +1101,7 @@ static void virtballoon_remove(struct virtio_device *vdev) kern_unmount(balloon_mnt); #endif + update_meminfo(0); kfree(vb); } -- 2.31.1
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