Date: Thu, 6 Jun 2013 14:17:52 -0700
From: Tejun Heo <tj@kernel.org>
To: Ben Greear <greearb@candelatech.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
        Rusty Russell <rusty@rustcorp.com.au>,
        Joe Lawrence <joe.lawrence@stratus.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        stable@vger.kernel.org, "Luis R. Rodriguez" <mcgrof@qca.qualcomm.com>,
        Jouni Malinen <jouni@qca.qualcomm.com>,
        Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>,
        Senthil Balasubramanian <senthilb@qca.qualcomm.com>,
        linux-wireless@vger.kernel.org, ath9k-devel@venema.h4ckr.net,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>
Subject: Re: stop_machine lockup issue in 3.9.y.
Message-ID: <20130606211752.GG5045@htj.dyndns.org>
References: <51AF8D4B.4090407@candelatech.com>
 <51AF91F5.6090801@candelatech.com>
 <51AFA677.9010605@candelatech.com>
 <20130605211157.GK10693@mtj.dyndns.org>
 <1370482492.24311.308.camel@edumazet-glaptop>
 <20130606031444.GA12335@mtj.dyndns.org>
 <1370489181.24311.318.camel@edumazet-glaptop>
 <51B004CD.6080007@candelatech.com>
 <20130606205514.GC5045@htj.dyndns.org>
 <51B0FBFC.8040809@candelatech.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <51B0FBFC.8040809@candelatech.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 945
Lines: 24

On Thu, Jun 06, 2013 at 02:15:40PM -0700, Ben Greear wrote:
> >First of all, kudos for tracking the issue down.  While the removal of
> >looping limit in softirq handling was the direct cause for making the
> >problem visible, it's very bothering that we have softirq runaway.
> >Finding out the perpetrator shouldn't be hard.  Something like the
> >following should work (untested).  Once we know which softirq (prolly
> >the network one), we can dig deeper.
> 
> The patch below assumes my fix is not in the code, right?

Yeap.

> I'll work on this, but it will probably be next week before
> I have time...gotta catch up on some other things first.

Thanks a lot for hunting this down!

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/