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Date: Tue, 24 Mar 2009 13:25:20 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>, Paul Mackerras <paulus@samba.org>,
       LKML <linux-kernel@vger.kernel.org>,
       Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH] perf_counter: fix perf_poll()
Message-ID: <20090324122520.GA17442@elte.hu>
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* Peter Zijlstra <peterz@infradead.org> wrote:

> On Tue, 2009-03-24 at 13:18 +0100, Peter Zijlstra wrote:
> > The below does seem to fix things (along with the previous kerneltop.c
> > patch),.. however now kerneltop is going splat like:
> > 
> > # ./kerneltop -e 1:2 -c 10
> > KernelTop refresh period: 2 seconds
> > ret: 1
> >  left: 0000000080200000
> >    ip: 000000008038d4ad
> > right: 00000000ffffffff
> > kerneltop: kerneltop.c:985: record_ip: Assertion `left <= ip && ip <= right' failed.
> > Aborted
> > 
> > Which isn't making much sense..
> 
> Seems to be an artefact of running a 32bit kerneltop on a 64bit 
> kernel.. freshyl compiled 64bit kerneltop works just fine.

Looks like you discovered a real bug by accident :)

	Ingo