Re: [PATCH] x86: printk_time to use tsc before cpu_clock is ready

[Peter Zijlstra]

On Wed, 2008-08-27 at 09:42 +0200, Ingo Molnar wrote:
> * Yinghai Lu <yhlu.kernel@xxxxxxxxx> wrote:
> 
> > +static unsigned long long tsc_clock(int cpu)
> > +{
> > +	unsigned long long t;
> > +
> > +	rdtscll(t);
> > +
> > +	return t;
> > +}
> 
> hm, i'm not sure i like the whole direction - this reintroduces 
> printk_clock in essence.
> 
> how about initializing cpu_clock() sooner, so that printk timestamps 
> start ticking as soon as possible?

which will make some archs quite unhappy iirc, see those arm and ia64
bugs I caused the other day.

--
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/