[RFC -v2] panic_on_oom_timeout

[Michal Hocko]

Hi,
I was thinking about this and I am more and more convinced that we
shouldn't care about panic_on_oom=2 configuration for now and go with
the simplest solution first. I have revisited my original patch and
replaced delayed work by a timer based on the feedback from Tetsuo.

I think we can rely on timers. A downside would be that we cannot dump
the full OOM report from the IRQ context because we rely on task_lock
which is not IRQ safe. But I do not think we really need it. An OOM
report will be in the log already most of the time and show_mem will
tell us the current memory situation.

What do you think?
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