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Commit b4000032 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

virtio_balloon: add array of stat names 



Jason Wang points out that it's very hard for users to build an array of
stat names. The naive thing is to use VIRTIO_BALLOON_S_NR but that
breaks if we add more stats - as done e.g. recently by commit 6c64fe7f
("virtio_balloon: export hugetlb page allocation counts").

Let's add an array of reasonably readable names.

Fixes: 6c64fe7f ("virtio_balloon: export hugetlb page allocation counts")
Cc: Jason Wang <jasowang@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: default avatarJonathan Helman <jonathan.helman@oracle.com>
parent 6d08b06e

include/uapi/linux/virtio_balloon.h

+15 −0
Original line number Diff line number Diff line
@@ -57,6 +57,21 @@ struct virtio_balloon_config { 
#define VIRTIO_BALLOON_S_HTLB_PGFAIL   9  /* Hugetlb page allocation failures */

#define VIRTIO_BALLOON_S_NR       10



#define VIRTIO_BALLOON_S_NAMES_WITH_PREFIX(VIRTIO_BALLOON_S_NAMES_prefix) { \

	VIRTIO_BALLOON_S_NAMES_prefix "swap-in", \

	VIRTIO_BALLOON_S_NAMES_prefix "swap-out", \

	VIRTIO_BALLOON_S_NAMES_prefix "major-faults", \

	VIRTIO_BALLOON_S_NAMES_prefix "minor-faults", \

	VIRTIO_BALLOON_S_NAMES_prefix "free-memory", \

	VIRTIO_BALLOON_S_NAMES_prefix "total-memory", \

	VIRTIO_BALLOON_S_NAMES_prefix "available-memory", \

	VIRTIO_BALLOON_S_NAMES_prefix "disk-caches", \

	VIRTIO_BALLOON_S_NAMES_prefix "hugetlb-allocations", \

	VIRTIO_BALLOON_S_NAMES_prefix "hugetlb-failures" \

}



#define VIRTIO_BALLOON_S_NAMES VIRTIO_BALLOON_S_NAMES_WITH_PREFIX("")



/*

 * Memory statistics structure.

 * Driver fills an array of these structures and passes to device.