Re: [PATCH] timekeeping: drop irq-context clocksource polling

[Thomas Gleixner]

On Sat, 2007-04-07 at 10:43 -0700, Daniel Walker wrote:
> Looks like this path ,
> 
> arch/i386/kernel/tsc.c: time_cpufreq_notifier(); <-- takes xtime_lock
> 			 mark_tsc_unstable();
>             		  clocksource_change_rating(&clocksource_tsc, 0);
> 			   timekeeping_change_clocksource(); <-- takes xtime_lock
> 
> 
> I'm not sure why the time_cpufreq_notifier is taking the xtime_lock tho .

Simply because it fiddles with variables which are relevant for
timekeeping.

	tglx


	

	

-
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/