Re: [patch] voluntary-preempt-2.6.9-rc2-mm1-S1

[Ingo Molnar]

* Karsten Wiese <annabellesgarden@xxxxxxxx> wrote:

> Just 1 small correction:
> >>>>
> --- kernel/time.c~      2004-09-19 15:09:38.000000000 +0200
> +++ kernel/time.c       2004-09-19 17:02:35.000000000 +0200
> @@ -96,8 +96,10 @@
>  asmlinkage long sys_gettimeofday(struct timeval __user *tv, struct timezone 
> __user *tz)
>  {
>  #ifdef CONFIG_LATENCY_TRACE
> -       if (!tv && ((long)tz == 1))
> +       if (!tv && ((long)tz == 1)) {
>                 user_trace_start();
> +               tz = NULL;
> +       }
>         if (!tv && !tz)
>                 user_trace_stop();

The point is to let gettimeofday(0,1) start tracing and
gettimeofday(0,0) stop tracing - a system-call-controlled tracing
facility (if trace_enabled=2). This was used to trace weird latencies
before, but it's not the normal mode of operation.

	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/