From: Ingo Molnar <mingo@elte.hu>
To: Karsten Wiese <annabellesgarden@yahoo.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch] voluntary-preempt-2.6.9-rc2-mm1-S1
Date: Sun, 19 Sep 2004 22:48:41 +0200 [thread overview]
Message-ID: <20040919204841.GA7004@elte.hu> (raw)
In-Reply-To: <200409192232.20139.annabellesgarden@yahoo.de>
* Karsten Wiese <annabellesgarden@yahoo.de> 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
next prev parent reply other threads:[~2004-09-19 20:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-19 20:32 [patch] voluntary-preempt-2.6.9-rc2-mm1-S1 Karsten Wiese
2004-09-19 20:48 ` Ingo Molnar [this message]
2004-09-19 21:11 ` Karsten Wiese
2004-09-19 21:49 ` Ingo Molnar
2004-09-19 21:46 ` Ingo Molnar
2004-09-19 22:36 ` Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2004-09-20 22:16 Svetoslav Slavtchev
2004-09-20 21:16 Shane Shrybman
2004-09-21 7:32 ` Ingo Molnar
2004-09-21 15:37 ` Shane Shrybman
2004-09-21 15:59 ` Shane Shrybman
2004-09-06 11:06 [patch] voluntary-preempt-2.6.9-rc1-bk12-R6 Ingo Molnar
2004-09-06 11:48 ` Rafael J. Wysocki
2004-09-06 12:25 ` Alexander Nyberg
2004-09-06 12:29 ` Ingo Molnar
2004-09-07 9:26 ` [patch] voluntary-preempt-2.6.9-rc1-bk12-R7 Ingo Molnar
2004-09-07 11:57 ` [patch] voluntary-preempt-2.6.9-rc1-bk12-R8 Ingo Molnar
2004-09-07 22:59 ` Lee Revell
2004-09-08 8:20 ` [patch] voluntary-preempt-2.6.9-rc1-bk12-R9 Ingo Molnar
2004-09-08 22:37 ` Lee Revell
2004-09-09 6:17 ` [patch] voluntary-preempt-2.6.9-rc1-bk12-S0 Ingo Molnar
2004-09-19 12:26 ` [patch] voluntary-preempt-2.6.9-rc2-mm1-S1 Ingo Molnar
2004-09-19 17:05 ` Felipe Alfaro Solana
2004-09-20 17:14 ` K.R. Foley
2004-09-20 19:48 ` Ingo Molnar
2004-09-21 2:25 ` K.R. Foley
2004-09-20 19:47 ` Magnus Määttä
2004-09-21 18:24 ` K.R. Foley
2004-09-21 19:21 ` Ingo Molnar
2004-09-21 19:37 ` K.R. Foley
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