http://bugzilla.kernel.org/show_bug.cgi?id=12530





------- Comment #4 from [email protected]  2009-01-30 01:49 -------
Sorry for taking so long to reply. I was trying to reproduce my results
consistently.

1. I know what it looks like, but that's what happens.
All the distributions I checked compile their kernels with Any as access mode.
That could be why this has not been noticed any earlier.

2. I've realized that 2 & 3 are different and not involve the other one.
Booting with nohz it's harder to get these messages, but they do happen, with
or without X11. They don't seem to affect performance or stability, though.

3. This started to happen alongside the MMCONFIG issue. At 2.6.25. At first (
2.6.25) I had a sharp performance decrease when the storm was detected, soon
followed by a crash. Right now it is non deterministic at all, sometimes it
takes several hours to happen, other times it does right after starting the X11
session.

4. I've had problems freezing my system the same way all this week.
I tend to compile my kernels with voluntary preemption.
I've tried with full preemption and I got several panics while starting X11;
with no preemption the system had too much latency to be used as desktop.

All in all, it seems the freezes are completely random.
The only thing for certain is that before a GPE storm happens, the system works
wonderfully, including suspend/resume.
Once the storm kicks in, at the very least it can't survive a suspend anymore.
Sadly I can't reproduce reliably one of those freezes, whatever I do.

#1 nowadays (2.6.28) seems harmless. Whether I use Any or MMCONFIG with the
subsequent warnings, the system behaves the same way.
#2 happens in console mode too, without having had a #3.
#3 only happens in X11. Or I might not have stressed enough the system without
X11.
If at all, #4 seems related to #3, not to #1 or #2.


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