linux-kernel - Re: [PATCH RT 3/4] net: netfilter: Serialize xt_write

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Message-ID: <alpine.LFD.2.02.1211012358280.2756@ionos>
Date:	Fri, 2 Nov 2012 00:01:59 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Peter LaDow <petela@...ougs.wsu.edu>
cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	Carsten Emde <C.Emde@...dl.org>, John Kacur <jkacur@...hat.com>
Subject: Re: [PATCH RT 3/4] net: netfilter: Serialize xt_write_recseq sections
 on RT

On Thu, 1 Nov 2012, Peter LaDow wrote:

> On Thu, Nov 1, 2012 at 2:26 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
> > Cough. You are missing a boat load of crucial fixes. There is a damned
> > good reason why 3.0.stable got 12 updates and the -rt version 14.
> 
> I don't doubt there are.  But we've only experienced one problem
> between 3.0.36-rt58 and 3.0.48-rt72.  Indeed, it might be easier to
> evaluate the risk if all the changelogs were readily available.  So
> far, however, we haven't discovered any other issues that give us any
> concerns.
> 
> > Your risk assessment is definitley interesting.
> 
> We have specifically tested 3.0.36-rt58 for performance in our
> application.  Moving to 3.0.48-rt72 poses risk about whether would
> still be able to meet our performance requirements.  And with regard
> to stability, the only issue we've had since our earlier moved to
> 3.0.36-rt58 was the netfilter problem.  We initially only saw the
> problem on PPP related interfaces, so we reverted to 3.0.3 (non-rt)
> for PPP related issues.
> 
> Now, if you think there are some issues that should raise eyebrows, or
> can point me to a list of changelogs, I'd be happy to evaluate them.

git log v3.0.36-rt58..3.0.48-rt72

That's what a source version control system is designed for AFAICT

Thanks,

	tglx
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