From: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
To: johnohagan <mail@johnohagan.com>
Cc: linux-rt-users@vger.kernel.org,
Jonathan Nieder <jrnieder@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: 3.0.0-1-rt-amd64: Suspend hangs
Date: Mon, 3 Oct 2011 21:14:52 +0200 [thread overview]
Message-ID: <20111003191452.GK6949@pengutronix.de> (raw)
In-Reply-To: <20110930010128.ede515e66ed1a331ad625a2a@johnohagan.com>
Hello John,
On Fri, Sep 30, 2011 at 01:01:28AM +1000, johnohagan wrote:
> Running Debian testing on an HP Mini 5102 with non-RT kernel, suspend
> to ram, suspend to disk and resume work as expected. With the RT
> kernels from both testing and Sid, attempting to suspend may result in
> a lock-up, with a blank screen and high fan operation. Keyboard and
> Sysrq keys are unresponsive and a hard shutdown is necessary. This
> happens randomly AFAIKT, of the order of half the time, possibly more
> often if larger programs are running, but still occurs in single-user
> mode.
>
> I ran the tests using /sys/power/pm_test described here:
> https://raw.github.com/torvalds/linux/master/Documentation/power/basic-pm-debugging.txt
>
> The freeze occurs with pm_test set to "processors", but not with "platform".
Can you please test the following two things:
- Can you reproduce with the kernel parameter:
maxcpus=1
?
- Does onlining/offlining of the 2nd cpu work reliably? That is:
echo 0 > /sys/devices/system/cpu/cpu1/online
echo 1 > /sys/devices/system/cpu/cpu1/online
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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next prev parent reply other threads:[~2011-10-03 19:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-29 15:01 3.0.0-1-rt-amd64: Suspend hangs johnohagan
2011-09-29 19:31 ` Uwe Kleine-König
2011-09-30 9:48 ` Jonathan Nieder
2011-10-03 19:14 ` Uwe Kleine-König [this message]
2011-10-05 15:01 ` johnohagan
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