netdev - Re: [PATCH net-next 1/2] rtnetlink: change rtnl_stats

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Date: Mon, 6 May 2024 18:28:46 +0200
From: Eric Dumazet <edumazet@...gle.com>
To: David Ahern <dsahern@...nel.org>
Cc: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
	Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org, eric.dumazet@...il.com, 
	Ido Schimmel <idosch@...dia.com>, Jiri Pirko <jiri@...dia.com>
Subject: Re: [PATCH net-next 1/2] rtnetlink: change rtnl_stats_dump() return value

On Mon, May 6, 2024 at 6:23 PM David Ahern <dsahern@...nel.org> wrote:
>
> On 5/2/24 10:03 AM, Eric Dumazet wrote:
> > On Thu, May 2, 2024 at 5:59 PM David Ahern <dsahern@...nel.org> wrote:
> >>
> >> On 5/2/24 5:37 AM, Eric Dumazet wrote:
> >>> By returning 0 (or an error) instead of skb->len,
> >>> we allow NLMSG_DONE to be appended to the current
> >>> skb at the end of a dump, saving a couple of recvmsg()
> >>> system calls.
> >>
> >> any concern that a patch similar to:
> >> https://lore.kernel.org/netdev/20240411180202.399246-1-kuba@kernel.org/
> >> will be needed again here?
> >
> > This has been discussed, Jakub answer was :
> >
> > https://lore.kernel.org/netdev/20240411115748.05faa636@kernel.org/
> >
> > So the plan is to change functions until a regression is reported.
> >
>
> As I commented in the past, it is more user friendly to add such
> comments to a commit message so that when a regression occurs and a
> bisect is done, the user hitting the regression sees the problem with an
> obvious resolution.

This commit has a single line being changed.

Whoever does a bisection will report, and the resolution is trivial.

I do not think we want to copy/paste a full page of all links to all
relevant commits.