linux-kernel - Re: [PATCH v2 1/2] net: make driver settling time configurable

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Date: Fri, 9 Feb 2024 13:59:44 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Andrew Lunn <andrew@...n.ch>
Cc: David Ventura <david@...idv.dev>, Jonathan Corbet <corbet@....net>,
 "David S. Miller" <davem@...emloft.net>, David Ahern <dsahern@...nel.org>,
 Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Greg
 Kroah-Hartman <gregkh@...uxfoundation.org>, "Paul E. McKenney"
 <paulmck@...nel.org>, Randy Dunlap <rdunlap@...radead.org>, Xiongwei Song
 <xiongwei.song@...driver.com>, linux-doc@...r.kernel.org (open
 list:DOCUMENTATION), linux-kernel@...r.kernel.org (open list),
 netdev@...r.kernel.org (open list:NETWORKING [IPv4/IPv6])
Subject: Re: [PATCH v2 1/2] net: make driver settling time configurable

On Thu,  8 Feb 2024 10:52:29 +0100 David Ventura wrote:
> During IP auto configuration, some drivers apparently need to wait a
> certain length of time to settle; as this is not true for all drivers,
> make this length of time configurable.

Please CC folks who gave you feedback, Andrew's is missing.

Andrew, what do you think about just removing the wait?
Or decreasing it to 1ms?
It feels a little wasteful to be adding uAPI for something
which as you said is likely papering over ancient bugs. We'll 
fix the bugs which are still around and the uAPI will stay 
forever :(