linux-kernel - Re: [PATCH] perf_counter: fix perf

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Message-Id: <1237897279.24918.182.camel@twins>
Date:	Tue, 24 Mar 2009 13:21:19 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Mike Galbraith <efault@....de>
Cc:	Paul Mackerras <paulus@...ba.org>, mingo@...e.hu,
	LKML <linux-kernel@...r.kernel.org>,
	Arjan van de Ven <arjan@...radead.org>
Subject: Re: [PATCH] perf_counter: fix perf_poll()

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.
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