linux-kernel - Re: perf_fuzzer crash on pentium 4

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Message-ID: <alpine.DEB.2.10.1405061205550.3372@vincent-weaver-1.umelst.maine.edu>
Date:	Tue, 6 May 2014 12:11:49 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	Vince Weaver <vincent.weaver@...ne.edu>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...nel.org>,
	Cyrill Gorcunov <gorcunov@...nvz.org>
Subject: Re: perf_fuzzer crash on pentium 4

On Tue, 6 May 2014, Peter Zijlstra wrote:

> On Tue, May 06, 2014 at 11:42:58AM -0400, Vince Weaver wrote:
> > 
> > So just to be difficult I fired up the perf_fuzzer on a Pentium 4 machine.
> > 
> > It crashes more or less instantly (sorry for the line wrapping, 
> > just got the serial console hooked up and don't have minicom configured 
> > right yet).
> > 
> > this is 3.15-rc4 with the anti-memory corruption patch applied.
> 
> *sigh*.. the one x86 PMU driver I really don't know. I might actually
> have some P4 class hardware, I'll try and get it wired up this week
> somewhere.

I have a Pentium II in working condition I can fire up too.  All my other 
older x86 hardware (K6-2, 486) pre-dates performance counters.

Just be glad that when I moved I had to leave behind the itanium, PA-RISC, 
Power-G3, Alpha, SPARC niagara, pentium-pro and K7-athlon machines.  
Though I guess other than the latter two those wouldn't be your problems.

If I had infinite time I'd try to get the SGI Octane, Ultrasparc, and 
avr32 boards up and going again.

Vince
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