drm i915 hangs on heavy io load

[Norbert Preining]

Hi Dave,

On Di, 30 Okt 2012, Dave Airlie wrote:
> > Thanks, running now with SNA. Let us see what happens.
> 
> Please don't, we ain't going to find the bug any quicker changing
> variables, if the only thing that changed on your system was the

Sorry, didn't know. I supposed from the email of Chris that I should try
it "to stress different code path" ... anyway, disabling it again.

> How long does it take you to reproduce, and does it happen when in

Very hard to say, most of the times it is in a few days scale.
Though it happened also after a few hours once.

> actual use. On my laptop I've noticed I come back to it sometimes and

Concerning actual use: I had instances on several occassions. Just 30min
ago it was while working with shotwell on my photo collection, tagging
photos. So there should not be a big disk activity or so, but a lot
of screen redraws etc when going through the photos.
On other times it was locked screen without screen saver.

Concerning coming back: For me it never worked. I always have to reboot
to get a working state again. Ok, to be more specific. GNome3 is dead.
I can close the windows normally with kbd shortcuts and some mouse
interaction, but no new windows, no moving etc.

> gnome-shell is dead. This never happened pre 3.7-rc's. But for me its
> a 3-4 day window so far for it to die, which makes bisecting it a bit

That sounds pretty much like my case, but since I often don't use
the laptop for 2 days or so, it might be a bit longer.

> of a major problem. and I'm just finished bisecting the last Ironlake
> regression that took over a month.

Ouch ...

> I would suggest starting a bisect on drivers/gpu/drm/i915 from 3.6
> final to 3.7-rc1 or maybe -rc2.

Ok, thanks. I will try.

Best wishes

Norbert
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Norbert Preining            preining@{jaist.ac.jp, logic.at, debian.org}
JAIST, Japan                                 TeX Live & Debian Developer
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