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

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Message-ID: <20130531151704.GA2910@sbohrermbp13-local.rgmadvisors.com>
Date:	Fri, 31 May 2013 10:17:04 -0500
From:	Shawn Bohrer <shawn.bohrer@...il.com>
To:	Jay Vosburgh <fubar@...ibm.com>
Cc:	vyasevic@...hat.com, Or Gerlitz <or.gerlitz@...il.com>,
	netdev@...r.kernel.org, Hadar Hen Zion <hadarh@...lanox.com>,
	Amir Vadai <amirv@...lanox.com>, Jiri Pirko <jiri@...nulli.us>
Subject: Re: 3.10.0-rc2 mlx4 not receiving packets for some multicast groups

On Thu, May 30, 2013 at 05:23:20PM -0700, Jay Vosburgh wrote:
> Vlad Yasevich <vyasevic@...hat.com> wrote:
> 
> >>>      CC: Jiri Pirko <jiri@...nulli.us>
> >>>      Signed-off-by: Vlad Yasevich <vyasevic@...hat.com>
> >>>      Signed-off-by: David S. Miller <davem@...emloft.net>
> >>>
> >>> I've confirmed that reverting this patch on top of 3.10-rc3 allows me
> >>> to receive packets on all of my multicast groups without the Mellanox
> >>> high_rate_steer option set.
> >>
> >> OK, impressive debugging... so what do we do from here? Vlad, Shawn
> >> observes a regression once this patch is used on a large scale setup
> >> that uses many multicast groups (you can read the posts done earlier
> >> on this thread), does this rings any bell w.r.t to the actual problem
> >> in the patch?
> >
> >I haven't seen that, but I didn't test with that many multicast groups. I
> >had 20 groups working.
> >
> >I'll take a look and see what might be going on.
> 
> 	I've actually been porting bonding to the dev_sync/unsync
> system, and have a patch series of 4 fixes to various internals of
> dev_sync/unsync; I'll post those under separate cover.  It may be that
> one or more of those things are the source of this problem (or I might
> have it all wrong).

Thanks Jay,

I've tested your 4 patches on top of Linus' tree and they do solve the
multicast issue I was seeing in this thread.

--
Shawn
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