Re: [RT] read_tsc: ACK! TSC went backward! Unsynced TSCs?

Ingo Molnar
2005-11-28T14:20:58Z

* Steven Rostedt <rostedt@goodmis.org> wrote:

> > Booting with idle=poll, fixes that.
> >
> > Hope it help
>
> I forgot to mention that I tried that too. But thank you for sending
> this, because, just to make sure, I tried it again, and now it booted.
> I think I might have had a typo when adding idle=poll the first time.
> I think of this as a temporary solution, and I won't be adding that to
> grub anytime soon. Manually typing it in at boot time will keep me
> remembering that it is there. As long as I make sure that I type it
> right ;-)
>
> OK, this means that I don't want to stay in the -RT kernel too long
> (electric prices are up you know).

you'll get problems on stock SMP kernels too, unless you use idle=poll.
(or notsc) You can get rid of those warnings in the -rt kernel by
disabling the PARANOID_GENERIC_TIME .config option. In any case, i think
that warning should be a once-per-bootup.

Ingo