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authorIgor Redko <redkoi@virtuozzo.com>2016-03-17 21:19:08 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 22:09:34 (GMT)
commit5057dcd0f1aaad57e07e728ba20a99e205c6b9de (patch)
tree2c8a3d6fc364777226e03a664e2b824ad8f5dfe1 /include
parentd02bd27bd33dd7e8d22594cd568b81be0cb584cd (diff)
downloadlinux-5057dcd0f1aaad57e07e728ba20a99e205c6b9de.tar.xz
virtio_balloon: export 'available' memory to balloon statistics
Add a new field, VIRTIO_BALLOON_S_AVAIL, to virtio_balloon memory statistics protocol, corresponding to 'Available' in /proc/meminfo. It indicates to the hypervisor how big the balloon can be inflated without pushing the guest system to swap. Signed-off-by: Igor Redko <redkoi@virtuozzo.com> Signed-off-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/uapi/linux/virtio_balloon.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h
index d7f1cbc..343d7dd 100644
--- a/include/uapi/linux/virtio_balloon.h
+++ b/include/uapi/linux/virtio_balloon.h
@@ -51,7 +51,8 @@ struct virtio_balloon_config {
#define VIRTIO_BALLOON_S_MINFLT 3 /* Number of minor faults */
#define VIRTIO_BALLOON_S_MEMFREE 4 /* Total amount of free memory */
#define VIRTIO_BALLOON_S_MEMTOT 5 /* Total amount of memory */
-#define VIRTIO_BALLOON_S_NR 6
+#define VIRTIO_BALLOON_S_AVAIL 6 /* Available memory as in /proc */
+#define VIRTIO_BALLOON_S_NR 7
/*
* Memory statistics structure.