From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <ak@suse.de>
Subject: Re: System crash in tcp_fragment()
Date: Tue, 21 May 2002 01:54:07 +0200
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Cc: george anzinger <george@mvista.com>, netdev@oss.sgi.com,
   linux-net@vger.kernel.org, davem@redhat.com, ak@muc.de, pekkas@netcore.fi
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> And also your reasoning about smp_processor_id() sounds strange,
> preemption code must reschedule thread preemted in the kernel to the
> same cpu, it is enough to avoid troubles with this. 

It's unfortunately the truth. Even in_interrupt() is buggy current 
on SMP preemptive.

-Andi