From: john stultz <johnstul@us.ibm.com>
To: Mattia Dongili <malattia@linux.it>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: first bisection results in -mm3 [was: Re: 2.6.15-mm2: reiser3 oops on suspend and more (bonus oops shot!)]
Date: Thu, 12 Jan 2006 15:26:01 -0800 [thread overview]
Message-ID: <1137108362.2890.141.camel@cog.beaverton.ibm.com> (raw)
In-Reply-To: <20060112220825.GA3490@inferi.kami.home>
On Thu, 2006-01-12 at 23:08 +0100, Mattia Dongili wrote:
> [cleaned up some Cc as this is not interesting to all MLs]
>
> Andrew,
>
> first bisection spotted the cause of the stalls at boot (happening while
> starting portmap and after usb-storage scan):
>
> time-clocksource-infrastructure.patch
> time-generic-timekeeping-infrastructure.patch
> time-i386-conversion-part-1-move-timer_pitc-to-i8253c.patch
> time-i386-conversion-part-2-rework-tsc-support.patch
> time-i386-conversion-part-3-enable-generic-timekeeping.patch
> time-i386-conversion-part-4-remove-old-timer_opts-code.patch
> time-i386-conversion-part-5-acpi-pm-variable-renaming-and-config-change.patch
> time-i386-clocksource-drivers.patch
> time-fix-cpu-frequency-detection.patch
>
> Cc-ed john stultz
>
> actually git bisect[1] pointed to time-fix-cpu-frequency-detection.patch
> but it's clearly wrong. Reverting all the above patches (I suppose they
> are somewhat related) fixes the stalls I experience. I can test
> corrections if necessary.
Hmmm. I'm not quite understanding. Does reverting just
time-fix-cpu-frequency-detection.patch change anything? I just sent out
a fix for an error case that patch, but I doubt you'd be hitting it.
Looking at the log here:
http://oioio.altervista.org/linux/boot-2.6.15-mm2.3
I'm curious if you're getting cpufreq effects during interval while the
TSC is being used as a clocksource before we switch to using the acpi_pm
clocksource.
After the system boots up, does it keep accurate time? Time doesn't
obviously move too fast or to slow compared to a watch?
Few things to try (independently):
1. Does booting w/ idle=poll change the behavior?
2. Does booting w/ clocksource=jiffies change the behavior?
3. After booting up, run:
echo tsc > /sys/devices/system/clocksource/clocksource0/current_clocksource
And check that the system keeps accurate time.
Thanks for the great testing and feedback!
-john
next prev parent reply other threads:[~2006-01-12 23:26 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-10 23:55 2.6.15-mm2: reiser3 oops on suspend and more (bonus oops shot!) Mattia Dongili
2006-01-11 1:00 ` Andrew Morton
2006-01-11 10:00 ` Pavel Machek
2006-01-11 11:24 ` Mattia Dongili
2006-01-11 18:40 ` Mattia Dongili
2006-01-12 22:08 ` first bisection results in -mm3 [was: Re: 2.6.15-mm2: reiser3 oops on suspend and more (bonus oops shot!)] Mattia Dongili
2006-01-12 23:26 ` john stultz [this message]
2006-01-14 12:08 ` Mattia Dongili
2006-01-16 20:16 ` john stultz
2006-01-16 20:40 ` Mattia Dongili
2006-01-16 21:42 ` john stultz
2006-01-16 22:19 ` Andi Kleen
2006-01-16 22:41 ` john stultz
2006-01-17 16:43 ` Mattia Dongili
2006-01-17 16:45 ` Mattia Dongili
2006-01-17 0:49 ` john stultz
2006-01-17 17:49 ` Mattia Dongili
2006-01-17 19:11 ` john stultz
2006-01-17 22:49 ` Mattia Dongili
2006-01-18 10:47 ` Mattia Dongili
2006-01-24 22:27 ` john stultz
2006-01-24 23:04 ` Mattia Dongili
2006-01-24 23:48 ` john stultz
2006-01-25 0:12 ` john stultz
2006-01-25 18:12 ` Mattia Dongili
2006-01-11 10:02 ` 2.6.15-mm2: reiser3 oops on suspend and more (bonus oops shot!) Pavel Machek
2006-01-11 14:27 ` Mattia Dongili
2006-01-15 22:14 ` 2.6.15-mm3 bisection: git-xfs.patch makes reiserfs oops Mattia Dongili
2006-01-15 22:48 ` Nathan Scott
2006-01-15 23:22 ` Mattia Dongili
2006-01-16 9:29 ` Hans Reiser
2006-01-16 11:48 ` Christoph Hellwig
2006-01-16 15:50 ` Mattia Dongili
2006-01-17 3:27 ` Hans Reiser
2006-01-16 11:51 ` Mattia Dongili
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