On Wed, May 28, 2014 at 05:20:11PM +0200, Peter Zijlstra wrote:
> > >
> > > 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.
Yeah, thanks.
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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,
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
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 patc
On Thu, May 15, 2014 at 01:31:16AM -0400, Vince Weaver wrote:
> On Thu, 15 May 2014, Cyrill Gorcunov wrote:
>
> > So I'm experiencing the same problem on latest -tip + my patches applied.
>
> glad it's not just me.
>
> I find the problem to be reproducible and so in theory it might be
> possibl
On Thu, 15 May 2014, Cyrill Gorcunov wrote:
> So I'm experiencing the same problem on latest -tip + my patches applied.
glad it's not just me.
I find the problem to be reproducible and so in theory it might be
possible to generate a small reproducing test case.
I meant to do that already but
On Fri, May 09, 2014 at 12:19:49PM -0400, Vince Weaver wrote:
> On Thu, 8 May 2014, Cyrill Gorcunov wrote:
> >
> > Updated.
> > ---
> > arch/x86/kernel/cpu/perf_event_p4.c | 67
> >
> > 1 file changed, 30 insertions(+), 37 deletions(-)
>
> I tried this pat
On Fri, May 09, 2014 at 12:19:49PM -0400, Vince Weaver wrote:
> On Thu, 8 May 2014, Cyrill Gorcunov wrote:
> >
> > Updated.
> > ---
> > arch/x86/kernel/cpu/perf_event_p4.c | 67
> >
> > 1 file changed, 30 insertions(+), 37 deletions(-)
>
> I tried this pat
On Thu, 8 May 2014, Cyrill Gorcunov wrote:
>
> Updated.
> ---
> arch/x86/kernel/cpu/perf_event_p4.c | 67
>
> 1 file changed, 30 insertions(+), 37 deletions(-)
I tried this patch, and even though it seemed to fix one of the NMI storms
I was experiencing I
On Thu, May 08, 2014 at 11:49:30AM +0400, Cyrill Gorcunov wrote:
> > Don, Vince, could you please give the patch a run? I've only compile tested
> > it obviously since I've no real p4 hw. And the patch itself is a bit ugly
> > but should bring the light if we're still having problems in events
> >
On Thu, May 08, 2014 at 11:37:56AM +0400, Cyrill Gorcunov wrote:
> On Wed, May 07, 2014 at 10:00:50PM -0400, Don Zickus wrote:
> >
> > I think my commit 13beacee817d27a40ffc6f065ea0042685611dd5 explains this
> > corruption. Though I have to admit I haven't looked through the problem
> > very clos
On Wed, May 07, 2014 at 10:00:50PM -0400, Don Zickus wrote:
>
> I think my commit 13beacee817d27a40ffc6f065ea0042685611dd5 explains this
> corruption. Though I have to admit I haven't looked through the problem
> very closely yet.
>
> IOW my lazy fix in that commit doesn't cover fuzzers and the
On Thu, May 08, 2014 at 01:14:56AM -0400, Vince Weaver wrote:
> >
> > There were a bug in p4 pmu Don (CC'ed) fixed not that long ago but I fear
> > not all corner cases might be covered yet.
>
> I hit the NMI warnings somewhat often on Intel hardware (Haswell, Core2)
> but it usually doesn't mak
On Wed, May 07, 2014 at 10:00:50PM -0400, Don Zickus wrote:
> >
> > If i'm right (btw it's possible to use addr2line helper?) then hwc->config
> > is corrupted and p4_config_get_bind returned nil simply because proper event
> > was not found. And I don't understand how it could happen because befo
On Thu, 8 May 2014, Cyrill Gorcunov wrote:
> > > The NMI issue is probably the only one that is p4 related, and I do get
> > > the NMI warnings on other machines too, it's just the p4 is the only one
> > > where it brings down the machine.
> >
> > Vince, could you please provde more details on
On Wed, May 07, 2014 at 12:23:08AM +0400, Cyrill Gorcunov 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
On Thu, May 08, 2014 at 01:51:44AM +0400, Cyrill Gorcunov wrote:
>
> > When fuzzing on the p4 *other* things do happen.
> > * at least two warnings pop up almost instantly
> > * eventually the machine will crash in an endless NMI storm
> > * also I managed to get the machine wedged wit
On Wed, May 07, 2014 at 05:17:22PM -0400, Vince Weaver wrote:
> On Wed, 7 May 2014, Cyrill Gorcunov wrote:
>
> > > I thought I was running with PeterZ's latest patch that was supposed to
> > > avoid the corruption. Hmmm. Let me reboot and try a few more things.
> >
> > Thanks! Please ping me i
On Wed, 7 May 2014, Cyrill Gorcunov wrote:
> > I thought I was running with PeterZ's latest patch that was supposed to
> > avoid the corruption. Hmmm. Let me reboot and try a few more things.
>
> Thanks! Please ping me if find something new.
It turns out to be my fault, I was running with an
On Wed, May 07, 2014 at 01:07:40PM -0400, Vince Weaver wrote:
> >
> > Vince, I'm trying to figure out where it might come from, but no
> > ideas yet.
>
> I just got this, also looks like poison (see RBX).
Indeed, except ending 2b value.
> This could be related to the ongoing memory corruption b
On Wed, 7 May 2014, Cyrill Gorcunov wrote:
> On Wed, May 07, 2014 at 08:49:02PM +0400, Cyrill Gorcunov wrote:
> > On Wed, May 07, 2014 at 12:46:24PM -0400, Vince Weaver wrote:
> > >
> > > sorry for the delay, I like to compile kernels locally and it takes a
> > > really long time to build a ftra
On Wed, May 07, 2014 at 08:49:02PM +0400, Cyrill Gorcunov wrote:
> On Wed, May 07, 2014 at 12:46:24PM -0400, Vince Weaver wrote:
> >
> > sorry for the delay, I like to compile kernels locally and it takes a
> > really long time to build a ftrace-enabled kernel on a pentium 4 it seems.
> >
> > An
On Wed, May 07, 2014 at 12:46:24PM -0400, Vince Weaver wrote:
>
> sorry for the delay, I like to compile kernels locally and it takes a
> really long time to build a ftrace-enabled kernel on a pentium 4 it seems.
>
> Anyway I threw some printks in, and this is what I get:
>
> [ 447.572626] VMW
On Wed, 7 May 2014, Cyrill Gorcunov wrote:
> On Tue, May 06, 2014 at 05:30:19PM -0400, Vince Weaver wrote:
> > On Wed, 7 May 2014, Cyrill Gorcunov wrote:
> >
> > > > [ 67.872274] BUG: unable to handle kernel NULL pointer dereference at
> > > > 0004
> > > > [ 67.876146] IP: []
> > > > p4
On Tue, May 06, 2014 at 05:30:19PM -0400, Vince Weaver wrote:
> On Wed, 7 May 2014, Cyrill Gorcunov wrote:
>
> > > [ 67.872274] BUG: unable to handle kernel NULL pointer dereference at
> > > 0004
> > > [ 67.876146] IP: [] p4_pmu_schedule_events+0xa5/0x331
> >
> > This looks like
> >
> >
On Wed, 7 May 2014, Cyrill Gorcunov wrote:
> > [ 67.872274] BUG: unable to handle kernel NULL pointer dereference at
> > 0004
> > [ 67.876146] IP: [] p4_pmu_schedule_events+0xa5/0x331
>
> This looks like
>
> p4_pmu_schedule_events:
> ...
> bind = p4_config_ge
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)
On Tue, 6 May 2014, Cyrill Gorcunov wrote:
> On Tue, May 06, 2014 at 12:11:49PM -0400, Vince Weaver wrote:
> >
> > If I had infinite time I'd try to get the SGI Octane, Ultrasparc, and
> > avr32 boards up and going again.
>
> Btw, Vince, perf_fuzzer -- it's
> http://web.eece.maine.edu/~vweaver
On Tue, May 06, 2014 at 12:11:49PM -0400, Vince Weaver wrote:
>
> If I had infinite time I'd try to get the SGI Octane, Ultrasparc, and
> avr32 boards up and going again.
Btw, Vince, perf_fuzzer -- it's
http://web.eece.maine.edu/~vweaver/projects/perf_events/fuzzer/?
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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 ho
On Tue, May 06, 2014 at 12:05:41PM -0400, Vince Weaver wrote:
> On Tue, 6 May 2014, Cyrill Gorcunov wrote:
>
> > On Tue, May 06, 2014 at 05:46:37PM +0200, Peter Zijlstra wrote:
> > > On Tue, May 06, 2014 at 11:42:58AM -0400, Vince Weaver wrote:
> > > >
> > > > So just to be difficult I fired up t
On Tue, 6 May 2014, Cyrill Gorcunov wrote:
> On Tue, May 06, 2014 at 05:46:37PM +0200, 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 les
On Tue, May 06, 2014 at 05:46:37PM +0200, 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
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)
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.
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