Re: frequent lockups in 3.18rc4

From: Linus Torvalds
Date: Wed Dec 03 2014 - 19:20:04 EST

On Wed, Dec 3, 2014 at 3:49 PM, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> Bah. Would have been too simple ....

I do think you tend to trust the hpet too much.

Yes, we've had issues with people doing bad things to the tsc, but on
the whole I really would tend to trust the internal CPU counter a
_lot_ more than the external hpet.

So I think it's equally (if not more) likely that switching from tsc
to hpet causes trouble, because I'd trust the tsc more than the hpet.

DaveJ, do this:

> Could you please run Ingos time-warp test on that machine for a while?

but perhaps also boot with "tsc=reliable", which _should_ get rid of
that CLOCK_SOURCE_MUST_VERIFY, and the clocksource watchdog should do

Thomas? Am I misreading that?

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