netdev - RE: [PATCH net-next] net: hyperv: Add attributes to show RX/TX indirection table

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Date:   Fri, 17 Jul 2020 17:33:15 +0000
From:   Haiyang Zhang <haiyangz@...rosoft.com>
To:     Stephen Hemminger <stephen@...workplumber.org>,
        David Miller <davem@...emloft.net>
CC:     Chi Song <Song.Chi@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "ast@...nel.org" <ast@...nel.org>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "kafai@...com" <kafai@...com>,
        "songliubraving@...com" <songliubraving@...com>,
        "yhs@...com" <yhs@...com>, "andriin@...com" <andriin@...com>,
        "john.fastabend@...il.com" <john.fastabend@...il.com>,
        "kpsingh@...omium.org" <kpsingh@...omium.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH net-next] net: hyperv: Add attributes to show RX/TX
 indirection table



> -----Original Message-----
> From: Stephen Hemminger <stephen@...workplumber.org>
> Sent: Friday, July 17, 2020 1:15 PM
> To: David Miller <davem@...emloft.net>
> Cc: Haiyang Zhang <haiyangz@...rosoft.com>; Chi Song
> <Song.Chi@...rosoft.com>; KY Srinivasan <kys@...rosoft.com>; Stephen
> Hemminger <sthemmin@...rosoft.com>; wei.liu@...nel.org;
> kuba@...nel.org; ast@...nel.org; daniel@...earbox.net; kafai@...com;
> songliubraving@...com; yhs@...com; andriin@...com;
> john.fastabend@...il.com; kpsingh@...omium.org; linux-
> hyperv@...r.kernel.org; netdev@...r.kernel.org
> Subject: Re: [PATCH net-next] net: hyperv: Add attributes to show RX/TX
> indirection table
> 
> On Fri, 17 Jul 2020 09:55:35 -0700 (PDT) David Miller <davem@...emloft.net>
> wrote:
> 
> > From: Haiyang Zhang <haiyangz@...rosoft.com>
> > Date: Fri, 17 Jul 2020 16:18:11 +0000
> >
> > > Also in some minimal installation, "ethtool" may not always be
> > > installed.
> >
> > This is never an argument against using the most well suited API for
> > exporting information to the user.
> >
> > You can write "minimal" tools that just perform the ethtool netlink
> > operations you require for information retrieval, you don't have to
> > have the ethtool utility installed.
> 
> Would it be better in the long term to make the transmit indirection table
> available under the new rt_netlink based API's for ethtool?
> 
> I can imagine that other hardware or hypervisors might have the same kind of
> transmit mapping.

I think it should be a good long term plan, if going forward more NIC 
drivers start to use TX table in the future.

Thanks,
- Haiyang