From: Knut Petersen <Knut_Petersen@t-online.de>
To: paulmck@linux.vnet.ibm.com
Cc: "Linus Torvalds" <torvalds@linux-foundation.org>,
"Ingo Molnar" <mingo@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Frédéric Weisbecker" <fweisbec@gmail.com>,
"Greg KH" <greg@kroah.com>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [BUG 3.12.rc4] Oops: unable to handle kernel paging request during shutdown
Date: Tue, 15 Oct 2013 10:06:40 +0200 [thread overview]
Message-ID: <525CF790.2090805@t-online.de> (raw)
In-Reply-To: <20131015005938.GA13655@linux.vnet.ibm.com>
On 15.10.2013 02:59, Paul E. McKenney wrote:
> On Mon, Oct 14, 2013 at 04:16:03PM -0700, Paul E. McKenney wrote:
>> On Mon, Oct 14, 2013 at 11:52:48PM +0200, Knut Petersen wrote:
>>> On 14.10.2013 23:28, Paul E. McKenney wrote:
>>>> On Mon, Oct 14, 2013 at 10:53:03AM -0700, Linus Torvalds wrote:
>>>> I´ll run some tests with those debug parameters tomorrow.
>>>> Any chance of a look at the .config file?
>>> Attached.
>> Thank you! Looks like a pretty standard RCU setup. Just to make sure
>> I saw it correctly -- you are running NR_CPUS=1? Getting races to happen
>> in that mode is truly impressive!
Yes. The AOpen i915GMm-hfs is a desktop board with mobile chipset for one Pentium-M.
As a musician I need an absolutely silent system, and the low power consumption of that
technology is a nice add-on.
> Ah, thing... When running with only one CPU, both of synchronize_rcu_bh()
> and synchronize_sched() become essentially no-ops. Anything that expected
> them to actually sleep would then break.
>
> However, because you are running with CONFIG_PREEMPT=y, synchronize_rcu()
> will still block.
>
> Thanx, Paul
>
next prev parent reply other threads:[~2013-10-15 8:07 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <525BD08C.2080101@t-online.de>
2013-10-14 17:53 ` [BUG 3.12.rc4] Oops: unable to handle kernel paging request during shutdown Linus Torvalds
2013-10-14 21:28 ` Paul E. McKenney
2013-10-14 21:51 ` Frederic Weisbecker
2013-10-14 22:31 ` Knut Petersen
2013-10-14 22:43 ` Frederic Weisbecker
2013-10-15 6:40 ` Ingo Molnar
2013-10-15 7:53 ` Knut Petersen
2013-10-17 14:25 ` Frederic Weisbecker
2013-10-18 6:30 ` Ingo Molnar
2013-10-14 21:52 ` Knut Petersen
2013-10-14 23:16 ` Paul E. McKenney
2013-10-15 0:59 ` Paul E. McKenney
2013-10-15 8:06 ` Knut Petersen [this message]
2013-10-25 8:38 ` Linus Torvalds
2013-10-25 9:02 ` Linus Torvalds
2013-10-25 9:08 ` Paul E. McKenney
2013-10-25 9:17 ` Greg Kroah-Hartman
2013-10-25 9:13 ` Greg Kroah-Hartman
2013-10-25 9:28 ` Rafael J. Wysocki
2013-10-25 9:28 ` Rafael J. Wysocki
2013-10-25 9:51 ` Rafael J. Wysocki
2013-10-25 9:54 ` Viresh Kumar
2013-10-25 10:10 ` Rafael J. Wysocki
2013-10-25 10:00 ` Viresh Kumar
2013-10-25 10:07 ` Linus Torvalds
2013-10-25 11:10 ` Rafael J. Wysocki
2013-10-25 13:49 ` Viresh Kumar
2013-10-25 14:21 ` Rafael J. Wysocki
2013-10-28 15:02 ` Knut Petersen
2013-10-25 10:23 ` Thomas Gleixner
2013-10-25 10:48 ` Linus Torvalds
2013-10-26 11:43 ` Ingo Molnar
2013-10-28 14:50 ` Knut Petersen
2013-10-28 15:01 ` Ingo Molnar
2013-10-28 15:16 ` Ingo Molnar
2013-10-28 15:45 ` Knut Petersen
2013-10-27 20:20 ` Linus Torvalds
2013-10-27 20:39 ` Linus Torvalds
2013-10-27 21:13 ` Linus Torvalds
2013-10-27 21:24 ` Greg Kroah-Hartman
2013-10-28 17:23 ` Bjorn Helgaas
2013-10-28 17:30 ` Veaceslav Falico
2013-10-28 17:35 ` Bjorn Helgaas
2013-10-28 17:39 ` Veaceslav Falico
2013-10-28 18:52 ` Greg Kroah-Hartman
2013-10-30 18:04 ` Pablo Neira Ayuso
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