Re: perf_fuzzer crash on pentium 4

Peter Zijlstra
2014-05-28T15:20:29Z

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On Wed, May 28, 2014 at 06:06:32PM +0400, Cyrill Gorcunov wrote:
> On Wed, May 28, 2014 at 03:56:17PM +0200, Pavel Machek wrote:
> > Hi!
> >
> > > 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.
> > >
> > > [ 67.872274] BUG: unable to handle kernel NULL pointer dereference at 00000004
> > > [ 67.876146] IP: [<ffffffff81013df2>] p4_pmu_schedule_events+0xa5/0x331
> >
> > Pentium 4 's were not 64bit, were they?
>
> Not all, but there were 64bit varians (Xeons iirc).

http://en.wikipedia.org/wiki/Pentium_d

consumer netburst chip with x86_64.

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