netdev - Re: [PATCH v4 net-next 3/6] net-smnp: reorganize SNMP fast path variables

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Message-ID: <CADjXwjjSjw-GxtiBFT_o+mdQT5hSOTH9nDNvEQHV1z4cdqX07A@mail.gmail.com>
Date: Thu, 26 Oct 2023 16:52:35 -0700
From: Coco Li <lixiaoyan@...gle.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Eric Dumazet <edumazet@...gle.com>, Neal Cardwell <ncardwell@...gle.com>, 
	Mubashir Adnan Qureshi <mubashirq@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>, 
	Jonathan Corbet <corbet@....net>, David Ahern <dsahern@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org, Chao Wu <wwchao@...gle.com>, 
	Wei Wang <weiwan@...gle.com>, Pradeep Nemavat <pnemavat@...gle.com>
Subject: Re: [PATCH v4 net-next 3/6] net-smnp: reorganize SNMP fast path variables

On Thu, Oct 26, 2023 at 7:20 AM Jakub Kicinski <kuba@...nel.org> wrote:
>
> On Thu, 26 Oct 2023 08:19:56 +0000 Coco Li wrote:
> > Subject: [PATCH v4 net-next 3/6] net-smnp: reorganize SNMP fast path variables
>
> s/smnp/snmp/
>
> > names of the metrics. User space binaries not ignoreing the
>
> ignoring
>
> > +/* Enums in this file are exported by their name and by
> > + * their values. User space binaries should ingest both
> > + * of the above, and therefore ordering changes in this
> > + * file does not break user space. For an example, please
> > + * see the output of /proc/net/netstat.
>
> I don't understand, what does it mean to be exposed by value?
> User space uses the enum to offset into something or not?
> If not why don't we move the enum out of uAPI entirely?
>
I mostly meant that i.e. cat /proc/net/netstat will export enum names
first, and that userspace binary should consume both the name and the
value.

I have no objections to moving the enums outside, but that seems a bit
tangential to the purpose of this patch series.

> > +     /* Caacheline organization can be found documented in
>
> Cacheline
>
> Please invest (your time) a spell check :S

Much apologies, will run through spell checkers in the future.