netdev - Re: netconsole not working on bridge+atlantic

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Date: Fri, 19 May 2023 22:09:24 -0500
From: Chris Adams <linux@...dams.net>
To: Florian Fainelli <f.fainelli@...il.com>
Cc: netdev@...r.kernel.org, Igor Russkikh <irusskikh@...vell.com>,
	Egor Pomozov <epomozov@...vell.com>
Subject: Re: netconsole not working on bridge+atlantic

Once upon a time, Florian Fainelli <f.fainelli@...il.com> said:
> On 5/19/2023 5:38 PM, Chris Adams wrote:
> >I have a system with an Aquantia AQC107 NIC connected to a bridge (for
> >VM NICs).  I set up netconsole on it, and it logs that it configures
> >correctly in dmesg, but it doesn't actually send anything (or log any
> >errors).  Any ideas?
> 
> It does not look like there is a ndo_poll_controller callback
> implemented by the atlantic driver which is usually a prerequisite
> to supporting netconsole.

Is that something that netconsole (or anything else in the kernel) could
check and warn about?  Is there a way other than looking at the source
(and knowing what to look for) to tell which NICs do or don't support
netconsole?  I searched around and didn't see that netconsole is only
expected to work with some NICs, or has certain requirements for
working.

> >This is on Fedora 37, updated to distro kernel 6.3.3-100.fc37.x86_64.
> >It hasn't worked for some time (not sure exactly when).
> 
> Does that mean that it worked up to a certain point and then stopped?

I'm not sure, I didn't check it for a while (I only use it when
something isn't working right, and that doesn't happen much).  It's
possible it hasn't worked since I added the Aquantia NIC.
-- 
Chris Adams <linux@...dams.net>