linux-kernel - Re: 2.6.25-rc5-git6: Reported regressions from 2.6.24

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Message-ID: <alpine.LFD.1.00.0803241038420.3781@apollo.tec.linutronix.de>
Date:	Mon, 24 Mar 2008 11:24:28 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Gabriel C <crazy@...galware.org>
cc:	Gabriel C <nix.or.die@...glemail.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	LKML <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Natalie Protasevich <protasnb@...il.com>,
	andi-bz@...stfloor.org, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.25-rc5-git6: Reported regressions from 2.6.24

On Mon, 24 Mar 2008, Gabriel C wrote:
> >>> Can you please give it a test ride ?
> >> Done , git head + Andi's patch + this version of your patch does work here.
> >>
> >> Also time-warp-test is just fine and everything else seems to work.
> > 
> > Also I've tested with my other motherboard and is fine too :)
> > 
> > Feel free to add my Tested-by when you push this patch.
> 
> Heh :/
> 
> ...
> 
> [ 5902.632878] Clocksource tsc unstable (delta = 4686687272 ns)
> [ 5920.650516] Time: acpi_pm clocksource has been installed.
> 
> ...
> 
> Seems like something still triggers that :/ 

Hmm. Can you please apply the patch below. It add some more info and
triggers the sysrq-q timer list printout when the watchdog
triggers. That might us give some insight into this.

Thanks,
	tglx

---
 kernel/time/clocksource.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

Index: linux-2.6/kernel/time/clocksource.c
===================================================================
--- linux-2.6.orig/kernel/time/clocksource.c
+++ linux-2.6/kernel/time/clocksource.c
@@ -87,8 +87,10 @@ static void clocksource_ratewd(struct cl
 	if (delta > -WATCHDOG_THRESHOLD && delta < WATCHDOG_THRESHOLD)
 		return;
 
-	printk(KERN_WARNING "Clocksource %s unstable (delta = %Ld ns)\n",
-	       cs->name, delta);
+	printk(KERN_WARNING
+	       "Clocksource %s unstable (delta = %Ld ns) E:%lu J:%lu\n",
+	       cs->name, delta, watchdog_timer.expires, jiffies);
+	sysrq_timer_list_show();
 	cs->flags &= ~(CLOCK_SOURCE_VALID_FOR_HRES | CLOCK_SOURCE_WATCHDOG);
 	clocksource_change_rating(cs, 0);
 	list_del(&cs->wd_list);
--
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