Re: [tip:core/rcu] Revert "rcu: Decrease memory-barrier usage basedon semi-formal proof"

[Ingo Molnar]

* Yinghai Lu <yinghai@xxxxxxxxxx> wrote:

> >> got:
> >>
> >> [   32.803704] cpu_dev_init done
> >> [   99.171292] memory_dev_init done
> > 
> > So the difference between these two is noise, I hope.  Adding a static
> > inline function that is not used should not have an effect on performance.
> > Still, the difference between 6 seconds and 60 seconds rises far above
> > this noise level, so the big differences are likely quite real.
> 
> could be softirq to kthread change...

Softirq processing can be pretty nondeterministic (for example there's no 
guarantee that we process all softirqs) - but kthreads ought to be pretty 
deterministic. Weird.

Thanks,

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/