linux-kernel - Re: Kernel broken on processors without performance counters

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Message-ID: <alpine.LRH.2.02.1507140841560.26168@file01.intranet.prod.int.rdu2.redhat.com>
Date:	Tue, 14 Jul 2015 08:43:38 -0400 (EDT)
From:	Mikulas Patocka <mpatocka@...hat.com>
To:	Borislav Petkov <bp@...en8.de>
cc:	Andy Lutomirski <luto@...capital.net>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Kees Cook <keescook@...omium.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Vince Weaver <vince@...ter.net>,
	"hillf.zj" <hillf.zj@...baba-inc.com>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	linux-kernel@...r.kernel.org
Subject: Re: Kernel broken on processors without performance counters



On Tue, 14 Jul 2015, Borislav Petkov wrote:

> On Wed, Jul 08, 2015 at 11:17:38AM -0400, Mikulas Patocka wrote:
> > Hi
> > 
> > I found out that the patch a66734297f78707ce39d756b656bfae861d53f62 breaks 
> > the kernel on processors without performance counters, such as AMD K6-3.
> 
> Out of curiosity: are you actually using this piece of computer history
> or you're only booting new kernels for regressions?
> 
> :)
> 
> Thanks.

I use it, but mostly for connecting to other machines. I wanted to test 
some other patch, I compiled a new kernel on K6-3 and found out this 
crash.

Mikulas
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