Re: frequent lockups in 3.18rc4

From: Linus Torvalds
Date: Wed Dec 03 2014 - 16:15:08 EST

On Wed, Dec 3, 2014 at 12:55 PM, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> But it's always negative, which means HPET is always ahead of
> TSC. That excludes pretty much the clocksource watchdog starvation
> issue which results in TSC being ahead of HPET due to a HPET
> wraparound (which takes ~300s).

Still, I'd be more likely to trust the TSC than the HPET on modern
machines.. And DaveJ's machine isn't some old one.

Of course, there's always BIOS games. Can we read the TSC offset
register and check it being constant (modulo sleep events)?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at