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Re: System crash in tcp_fragment()

To: Andi Kleen <ak@xxxxxxx>
Subject: Re: System crash in tcp_fragment()
From: george anzinger <george@xxxxxxxxxx>
Date: Mon, 20 May 2002 17:34:21 -0700
Cc: kuznet@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx, linux-net@xxxxxxxxxxxxxxx, davem@xxxxxxxxxx, ak@xxxxxx, pekkas@xxxxxxxxxx
Organization: Monta Vista Software
References: <20020521015407.A1296@xxxxxxxxxxxxx> <200205210011.EAA04286@xxxxxxxxxxxxx> <20020521022007.A6248@xxxxxxxxxxxxx>
Sender: owner-netdev@xxxxxxxxxxx
Andi Kleen wrote:
> 
> On Tue, May 21, 2002 at 04:11:00AM +0400, A.N.Kuznetsov wrote:
> > Hello!
> >
> > > It's unfortunately the truth. Even in_interrupt() is buggy current
> > > on SMP preemptive.
> >
> > And why folks working on preemtive kernel do not repair this?
> > To all that I remember it is well known issue.
> 
> It is fixed on x86-64 @)
> 
> if [ "$CONFIG_SMP" = "n" ]; then
>    bool 'Preemptible Kernel' CONFIG_PREEMPT
> fi
> 
That is not a fix!  It is dodging the issue. ;)

-- 
George Anzinger   george@xxxxxxxxxx
High-res-timers: 
http://sourceforge.net/projects/high-res-timers/
Real time sched:  http://sourceforge.net/projects/rtsched/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml

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