Re: [PATCHv2] qemu: fix unsuitable error report when get memory stats

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On Sat, May 30, 2015 at 10:28:05 +0800, Wang Yufei wrote:
> From: Zhang Bo <oscar.zhangbo@xxxxxxxxxx>
> 
> when we run the command 'virsh dommemstat xxx',
> althrough memballoon's model is set 'none' in vm's XML,
> it still reports an error in libvirtd.log.
> error : qemuMonitorFindBalloonObjectPath:1042 : internal error: Cannot determine balloon device path
> Apparently, if we don't set memballoon, we don't need to
> set balloon device path.
> 
> Signed-off-by: Wang Yufei <james.wangyufei@xxxxxxxxxx>
> Signed-off-by: Zhang Bo <oscar.zhangbo@xxxxxxxxxx>
> ---
>  src/qemu/qemu_monitor.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
> index f959b74..c72702d 100644
> --- a/src/qemu/qemu_monitor.c
> +++ b/src/qemu/qemu_monitor.c
> @@ -1711,7 +1711,9 @@ qemuMonitorGetMemoryStats(qemuMonitorPtr mon,
>      QEMU_CHECK_MONITOR(mon);
>  
>      if (mon->json) {
> -        ignore_value(qemuMonitorFindBalloonObjectPath(mon, "/"));
> +        if (mon->vm->def->memballoon &&
> +            mon->vm->def->memballoon->model != VIR_DOMAIN_MEMBALLOON_MODEL_NONE)
> +            ignore_value(qemuMonitorFindBalloonObjectPath(mon, "/"));
>          mon->ballooninit = true;
>          return qemuMonitorJSONGetMemoryStats(mon, mon->balloonpath,
>                                               stats, nr_stats);

NACK, see my reply to v1.

Peter

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