Re: [PATCH RT 3/4] net: netfilter: Serialize xt_write_recseq sections on RT

[Peter LaDow <petela@gocougs.wsu.edu>]

On Thu, Nov 1, 2012 at 2:26 PM, Thomas Gleixner <tglx@linutronix.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.

Thanks,
Pete