Re: [Qemu-devel] [PATCH] virtio-balloon: fix internal stat name array to match Linux kernel

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, May 04, 2018 at 09:30:45AM -0700, Jonathan Helman wrote:
> The Linux kernel commit b40000325044 ("virtio_balloon: add array
> of stat names") defines an array of stat name strings for consumers
> of the virtio interface to use via the virtio_balloon.h header
> file, rather than requiring each consumer to define its own. But at
> present, the stat names defined in this array by the Linux kernel
> do not match up with those defined internally by QEMU. This patch
> fixes this inconsistency by changing the QEMU stat names to match
> those defined by the Linux kernel.
> 
> Signed-off-by: Jonathan Helman <jonathan.helman@oracle.com>
> Cc: Rob Gardner <rob.gardner@oracle.com>
> Cc: Thomas Tai <thomas.tai@oracle.com>

So pls import the header from Linux so we can stop maintaining it
in QEMU.

> ---
>  docs/virtio-balloon-stats.txt | 4 ++--
>  hw/virtio/virtio-balloon.c    | 4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/docs/virtio-balloon-stats.txt b/docs/virtio-balloon-stats.txt
> index 9985e1d..7c69fdb 100644
> --- a/docs/virtio-balloon-stats.txt
> +++ b/docs/virtio-balloon-stats.txt
> @@ -34,8 +34,8 @@ which will return a dictionary containing:
>        - stat-total-memory
>        - stat-available-memory
>        - stat-disk-caches
> -      - stat-htlb-pgalloc
> -      - stat-htlb-pgfail
> +      - stat-hugetlb-allocations
> +      - stat-hugetlb-failures
>  
>    o A key named last-update, which contains the last stats update
>      timestamp in seconds. Since this timestamp is generated by the host,
> diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
> index 1f7a87f..8421d9f 100644
> --- a/hw/virtio/virtio-balloon.c
> +++ b/hw/virtio/virtio-balloon.c
> @@ -52,8 +52,8 @@ static const char *balloon_stat_names[] = {
>     [VIRTIO_BALLOON_S_MEMTOT] = "stat-total-memory",
>     [VIRTIO_BALLOON_S_AVAIL] = "stat-available-memory",
>     [VIRTIO_BALLOON_S_CACHES] = "stat-disk-caches",
> -   [VIRTIO_BALLOON_S_HTLB_PGALLOC] = "stat-htlb-pgalloc",
> -   [VIRTIO_BALLOON_S_HTLB_PGFAIL] = "stat-htlb-pgfail",
> +   [VIRTIO_BALLOON_S_HTLB_PGALLOC] = "stat-hugetlb-allocations",
> +   [VIRTIO_BALLOON_S_HTLB_PGFAIL] = "stat-hugetlb-failures",
>     [VIRTIO_BALLOON_S_NR] = NULL
>  };
>  
> -- 
> 1.8.3.1
> 
> Based-on: <1524799751-151698-5-git-send-email-mst@redhat.com>
> ([PULL 4/4] virtio-balloon: add hugetlb page allocation counts)