Re: [dpdk-dev] [PATCH] net/ixgbevf: fix stats update after a PF reset

[Olivier Matz <olivier.matz@6wind.com>]

Hi Wei,

On Thu, 16 Feb 2017 17:49:22 +0100, Olivier Matz <olivier.matz@6wind.com> wrote:
> Hi Wei,
> 
> On Thu, 9 Feb 2017 14:50:05 +0000, "Dai, Wei" <wei.dai@intel.com> wrote:
> > > -----Original Message-----
> > > From: Dai, Wei
> > > Sent: Thursday, February 9, 2017 10:38 PM
> > > To: 'Olivier Matz' <olivier.matz@6wind.com>; dev@dpdk.org; Zhang,
> > > Helin <helin.zhang@intel.com>; Ananyev, Konstantin
> > > <konstantin.ananyev@intel.com>
> > > Cc: Guo Fengtian <fengtian.guo@6wind.com>; stable@dpdk.org
> > > Subject: RE: [dpdk-dev] [PATCH] net/ixgbevf: fix stats update after
> > > a PF reset
> > > 
> > > The stats register can rewind to zero when the port is running for
> > > a long period. So I am afraid that this check is not always correct.
> > > Why not introduce a variable to directly indicate whether the
> > > resulted stats should be updated or not.  
> >
> > Another way is to clear
> > hw_stats->last_vfgprc/last_vfgorc/last_vfgptc/last_vfmprc at the same
> > time PF is set down.
> >   
> 
> Can we know easily in VF if the PF was set down?

Any guideline for this? Or is it something we cannot fix?

Thanks,
Olivier