[Ksummit-2012-discuss] [ATTEND] kernel core dump and "dying breath"
jkosina at suse.cz
Wed Jun 27 20:02:11 UTC 2012
On Wed, 27 Jun 2012, H. Peter Anvin wrote:
> > There is another thing that crossed my mind. Think what we do with the
> > keyboard when we have one. Totally predictable. Hit page up, stare at
> > it for 30s, hit page up again, etc. Meaning, that if we instead skip
> > the whole needing the input, and simulate it at panic, it could be a
> > nice win for minimal cost. Page up every 30s. Hit the top? Page
> > down every 30s. Repeat until power-off. You could collect the whole
> > panic message with a camera too, albeit in chunks.
> Mmmm... timers.
Well, I believe this could be worked around somehow. Very long cpu_relax()
loops emulating the delays, etc (yes, the actual length of those would
probably have to be pre-calibrated during early bootup phase, but that's
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