netdev - Re: [PATCH 1/4] net: arp: introduce arp_evict

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Message-ID: <20211014094307.0a40078f@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Thu, 14 Oct 2021 09:43:07 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     James Prestwood <prestwoj@...il.com>
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH 1/4] net: arp: introduce arp_evict_nocarrier sysctl
 parameter

On Thu, 14 Oct 2021 09:32:31 -0700 James Prestwood wrote:
> On Wed, 2021-10-13 at 16:40 -0700, Jakub Kicinski wrote:
> > On Wed, 13 Oct 2021 16:37:14 -0700 Jakub Kicinski wrote:  
> > > Please make sure you run ./scripts/get_maintainers.pl on the patch
> > > and add appropriate folks to CC.  
> > 
> > Ah, and beyond that please make sure to CC wireless folks.
> > The linux-wireless mailing list, Johannes, Jouni, etc.
> > The question of the "real root cause" is slightly under-explained.
> > Sounds like something restores carrier before the device is actually
> > up.  
> 
> Sure. As for the real root cause, are you talking about the AP side? As
> far as the station is concerened the initial packets are making it out
> after a roam. So possibly the AP is restoring carrier before it should,
> and packets are getting dropped.

Yeah, that's what I meant. If you're saying that station sends the
packet out correctly then indeed nothing we can do but the workaround.

> In v2 I'll include a cover letter with more details about the test
> setup, and what was observed.

Thanks!