From: Dave Jones <davej@redhat.com>
To: Stefano Brivio <stefano.brivio@polimi.it>
Cc: Ingo Molnar <mingo@elte.hu>, "Rafael J. Wysocki" <rjw@sisk.pl>,
linux-kernel@vger.kernel.org, Michael Buesch <mb@bu3sch.de>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Len Brown <lenb@kernel.org>
Subject: Re: [BUG] jiffies counter leaps in 2.6.24-rc3
Date: Thu, 29 Nov 2007 13:24:02 -0500 [thread overview]
Message-ID: <20071129182402.GE12481@redhat.com> (raw)
In-Reply-To: <20071129185743.46daa8ad@morte>
On Thu, Nov 29, 2007 at 06:57:43PM +0100, Stefano Brivio wrote:
> > adjust_jiffies() always gets called on a speed transition. I'm wondering
> > if perhaps we shouldn't do that if we're using something other than
> > the tsc for timekeeping.
>
> I gave other clocksources a try:
>
> morte st3 # cat /sys/devices/system/clocksource/clocksource0/available_clocksource
> acpi_pm pit jiffies tsc
>
> Setting tsc as current clocksource:
> morte st3 # echo tsc > /sys/devices/system/clocksource/clocksource0/current_clocksource
> [13367.729060] Time: tsc clocksource has been installed.
> didn't fix anything. Other weirdness here: it looks like it affects my
> typematic delay and repeat rate.
*grumble*
> Setting jiffies or pit as current clocksource didn't fix anything, but at
> least it doesn't cause anything bad.
>
> Do you want me to comment out adjust_jiffies() and see what happens?
Just for laughs, why not.
Dave
--
http://www.codemonkey.org.uk
next prev parent reply other threads:[~2007-11-29 18:25 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-24 16:51 [BUG] jiffies counter leaps in 2.6.24-rc3 Stefano Brivio
2007-11-24 17:56 ` Frans Pop
2007-11-24 18:09 ` Stefano Brivio
2007-11-24 18:48 ` Rafael J. Wysocki
2007-11-24 18:46 ` Stefano Brivio
2007-11-24 19:31 ` Rafael J. Wysocki
2007-11-26 18:00 ` Stefano Brivio
2007-11-29 7:20 ` Stefano Brivio
2007-11-29 10:33 ` Ingo Molnar
2007-11-29 8:50 ` Stefano Brivio
2007-11-29 10:35 ` Ingo Molnar
2007-11-29 17:45 ` Dave Jones
2007-11-29 17:57 ` Stefano Brivio
2007-11-29 18:24 ` Dave Jones [this message]
2007-11-29 19:25 ` Stefano Brivio
2007-11-29 19:36 ` Ingo Molnar
2007-11-29 20:12 ` Stefano Brivio
2007-11-29 20:04 ` Dave Jones
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