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Re: [Qemu-devel] [PATCH v2 1/1] virtio-balloon: include statistics of di
From: |
Tomáš Golembiovský |
Subject: |
Re: [Qemu-devel] [PATCH v2 1/1] virtio-balloon: include statistics of disk/file caches |
Date: |
Tue, 20 Feb 2018 12:15:13 +0100 |
On Mon, 19 Feb 2018 21:11:27 -0800
Jonathan Helman <address@hidden> wrote:
> > On Feb 19, 2018, at 5:11 AM, Tomáš Golembiovský <address@hidden> wrote:
> >
> > On Wed, 14 Feb 2018 00:07:53 +0200
> > "Michael S. Tsirkin" <address@hidden> wrote:
> >
> >> On Tue, Feb 13, 2018 at 12:29:39PM -0800, Jonathan Helman wrote:
> >>>
> >>>
> >>> On 02/05/2018 04:08 AM, Tomáš Golembiovský wrote:
> >>>> ping
> >>>>
> >>>> On Tue, 5 Dec 2017 13:14:46 +0100
> >>>> Tomáš Golembiovský <address@hidden> wrote:
> >>>>
> >>>
> >>> It would be good to include the corresponding upstream kernel change in
> >>> the
> >>> commit message. This would be similar to a previous change:
> >>> https://lists.gnu.org/archive/html/qemu-devel/2016-02/msg05555.html
> >>
> >> good idea, but this has been merged by now.
> >
> > Maybe next time, sorry.
> >
> >
> >>>>> Signed-off-by: Tomáš Golembiovský <address@hidden>
> >>>>> ---
> >>>>> hw/virtio/virtio-balloon.c | 1 +
> >>>>> include/standard-headers/linux/virtio_balloon.h | 3 ++-
> >>>>> 2 files changed, 3 insertions(+), 1 deletion(-)
> >>>>>
> >>>>> diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
> >>>>> index 37cde38982..8141326a51 100644
> >>>>> --- a/hw/virtio/virtio-balloon.c
> >>>>> +++ b/hw/virtio/virtio-balloon.c
> >>>>> @@ -50,6 +50,7 @@ static const char *balloon_stat_names[] = {
> >>>>> [VIRTIO_BALLOON_S_MEMFREE] = "stat-free-memory",
> >>>>> [VIRTIO_BALLOON_S_MEMTOT] = "stat-total-memory",
> >>>>> [VIRTIO_BALLOON_S_AVAIL] = "stat-available-memory",
> >>>>> + [VIRTIO_BALLOON_S_CACHES] = "stat-disk-caches",
> >>>>> [VIRTIO_BALLOON_S_NR] = NULL
> >>>>> };
> >>>>> diff --git a/include/standard-headers/linux/virtio_balloon.h
> >>>>> b/include/standard-headers/linux/virtio_balloon.h
> >>>>> index 9d06ccd066..7b0a41b8fc 100644
> >>>>> --- a/include/standard-headers/linux/virtio_balloon.h
> >>>>> +++ b/include/standard-headers/linux/virtio_balloon.h
> >>>>> @@ -52,7 +52,8 @@ struct virtio_balloon_config {
> >>>>> #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_AVAIL 6 /* Available memory as in /proc
> >>>>> */
> >>>>> -#define VIRTIO_BALLOON_S_NR 7
> >>>>> +#define VIRTIO_BALLOON_S_CACHES 7 /* Disk caches */
> >>>
> >>> I've been wondering, VIRTIO_BALLOON_S_AVAIL is not in the virtio spec (see
> >>> Section 5.5.6.3). It seems like this header file needs to be in sync with
> >>> the virtio spec in order to make this change.
> >>>
> >>> I have a similar change to add a new statistic and was wondering this.
> >>
> >> Absolutely. Tomáš?
> >
> > Sent. I also included description for the VIRTIO_BALLOON_S_AVAIL that
> > was missing.
> >
> >
> >>>>> +#define VIRTIO_BALLOON_S_NR 8
> >>>>> /*
> >>>>> * Memory statistics structure.
> >>>>> --
> >>>>> 2.15.1
> >>>>>
> >>>>
> >>>>
> >>>
> >>> You need to add your new stat to the list of stats in
> >>> docs/virtio-balloon-stats.txt.
> >>>
> >>> Jon
> >>
> >> Can't hurt, I agree.
> >
> > Sent.
> >
>
> Awesome, thank you.
>
> Do you also plan to make the commensurate changes in libvirt, or did I just
> miss the patch?
Yes, I do. I just didn't get to it yet.
Tomas
>
> Jon
>
> > Tomas
> >
> > --
> > Tomáš Golembiovský <address@hidden>
>
--
Tomáš Golembiovský <address@hidden>