netdev - Re: 3.10.0-rc2 mlx4 not receiving packets for some multicast groups

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Message-ID: <1369414736.3301.420.camel@edumazet-glaptop>
Date:	Fri, 24 May 2013 09:58:56 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Shawn Bohrer <shawn.bohrer@...il.com>
Cc:	netdev@...r.kernel.org, Or Gerlitz <or.gerlitz@...il.com>,
	Hadar Hen Zion <hadarh@...lanox.com>,
	Rony Efraim <ronye@...lanox.com>,
	Amir Vadai <amirv@...lanox.com>
Subject: Re: 3.10.0-rc2 mlx4 not receiving packets for some multicast groups

On Fri, 2013-05-24 at 11:34 -0500, Shawn Bohrer wrote:
> On Fri, May 24, 2013 at 10:49:31AM -0500, Shawn Bohrer wrote:
> > I just started testing the 3.10 kernel, previously we were on 3.4 so
> > there is a fairly large jump.  I've additionally applied the following
> > four patches to the 3.10.0-rc2 kernel that I'm testing:
> > 
> > https://patchwork.kernel.org/patch/2484651/
> > https://patchwork.kernel.org/patch/2484671/
> > https://patchwork.kernel.org/patch/2484681/
> > https://patchwork.kernel.org/patch/2484641/
> > 
> > I don't know if those patches are related to my issues or not but I
> > plan on trying to reproduce without them soon.
> 
> I've reverted the four patches above from my test kernel and still see
> the issue so they don't appear to be the cause.

I suggest adding in tools/testing/selftests/net tests about multicast
stuff.

It seems many NIC suffer from bugs in this area, especially when dealing
with a lot of groups.



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