netdev - Re: deadlocks if use htb

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Date:	Wed, 14 Jan 2009 14:15:29 +0100
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	Denys Fedoryschenko <denys@...p.net.lb>,
	Chris Caputo <ccaputo@....net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Badalian Vyacheslav <slavon@...telecom.ru>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: deadlocks if use htb

On Wed, 2009-01-14 at 13:12 +0000, Jarek Poplawski wrote:
> On Wed, Jan 14, 2009 at 03:05:46PM +0200, Denys Fedoryschenko wrote:
> > > I'm afraid its a bit more than that:
> > >
> > > ca109491f612aab5c8152207631c0444f63da97f
> > > 37810659ea7d9572c5ac284ade272f806ef8f788
> > > a0a99b227da57f81319dd239bc4de811b0f530ec
> > > b2e3c0adec918ea22b6c9d7c76193dd3aaba9bd4
> > > 8bdec955b0da2ffbd10eb9b200651dd1f9e366f2
> > > d5fd43c4ae04523e1dcd7794f9c511b289851350
> > > 731a55ba0f17064f85903b7bf8e24849ec6cfa20
> > > a6037b61c2f5fc99c57c15b26d7cfa58bbb34008
> > > e3f1d883740b09e5116d4d4e30a6a6987264a83c
> > > 82c5b7b527ccc4b5d3cf832437e842f9d2920a79
> > >
> > > and
> > >
> > > 6e5c172cf7ca1ab878cc6a6a4c1d52fef60f3ee0
> > >
> > > Also, all this is rather invasive and large, so I'm not sure it will
> > > meet the -stable criteria.
> > 
> > Then i will try to run 2.6.29-rc1-git4. Kind of risky to run rc1 on loaded 
> > router, but i am hitting this bug with hrtimers hardly, so no choice for me 
> > seems. And i cannot disable hrtimers because of bad shaper precision.
> > Thanks a lot for info and patches :-)
> > 
> 
> Denys, since these three patches worked for Chris, I guess it's safer
> to stay with 2.6.28 anyway (or my patches mentioned earlier in this
> thread). rc1 is really not stable...

Yeah, but those three patches have some holes in them still, so I cannot
recommend just patching in those three.

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