From: Valdis.Kletnieks@vt.edu
To: paulmck@linux.vnet.ibm.com
Cc: sachinp <sachinp@linux.vnet.ibm.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Li Zefan <lizf@cn.fujitsu.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Linuxppc-dev <Linuxppc-dev@ozlabs.org>,
Subrata Modak <subrata@linux.vnet.ibm.com>,
DIVYA PRAKASH <dipraksh@linux.vnet.ibm.com>
Subject: Re: 2.6.35-stable/ppc64/p7: suspicious rcu_dereference_check() usage detected during 2.6.35-stable boot
Date: Thu, 16 Sep 2010 11:12:31 -0400 [thread overview]
Message-ID: <10430.1284649951@localhost> (raw)
In-Reply-To: Your message of "Mon, 09 Aug 2010 09:12:00 PDT." <20100809161200.GC3026@linux.vnet.ibm.com>
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On Mon, 09 Aug 2010 09:12:00 PDT, "Paul E. McKenney" said:
> On Mon, Aug 02, 2010 at 02:22:12PM +0530, Subrata Modak wrote:
> > Hi,
> >
> > The following suspicious rcu_dereference_check() usage is detected
> > during 2.6.35-stable boot on my ppc64/p7 machine:
> >
> > =========================
> > [ INFO: suspicious rcu_dereference_check() usage. ]
> > ---------------------------------------------------
> > kernel/sched.c:616 invoked rcu_dereference_check() without protection!
> > other info that might help us debug this:
> Thank you for locating this one! This looks like the same issue that
> Ilia Mirkin located. Please see below for my analysis -- no fix yet,
> as I need confirmation from cgroups experts. I can easily create a
> patch that suppresses the warning, but I don't yet know whether this is
> the right thing to do.
Ping? I just hit it on 2.6.36-rc4-mmotm0915. Just wanted to make sure the
issue hadn't been lost/forgotten.
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WARNING: multiple messages have this Message-ID (diff)
From: Valdis.Kletnieks@vt.edu
To: paulmck@linux.vnet.ibm.com
Cc: Subrata Modak <subrata@linux.vnet.ibm.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Li Zefan <lizf@cn.fujitsu.com>,
Linuxppc-dev <Linuxppc-dev@ozlabs.org>,
sachinp <sachinp@linux.vnet.ibm.com>,
DIVYA PRAKASH <dipraksh@linux.vnet.ibm.com>
Subject: Re: 2.6.35-stable/ppc64/p7: suspicious rcu_dereference_check() usage detected during 2.6.35-stable boot
Date: Thu, 16 Sep 2010 11:12:31 -0400 [thread overview]
Message-ID: <10430.1284649951@localhost> (raw)
In-Reply-To: Your message of "Mon, 09 Aug 2010 09:12:00 PDT." <20100809161200.GC3026@linux.vnet.ibm.com>
[-- Attachment #1: Type: text/plain, Size: 974 bytes --]
On Mon, 09 Aug 2010 09:12:00 PDT, "Paul E. McKenney" said:
> On Mon, Aug 02, 2010 at 02:22:12PM +0530, Subrata Modak wrote:
> > Hi,
> >
> > The following suspicious rcu_dereference_check() usage is detected
> > during 2.6.35-stable boot on my ppc64/p7 machine:
> >
> > =========================
> > [ INFO: suspicious rcu_dereference_check() usage. ]
> > ---------------------------------------------------
> > kernel/sched.c:616 invoked rcu_dereference_check() without protection!
> > other info that might help us debug this:
> Thank you for locating this one! This looks like the same issue that
> Ilia Mirkin located. Please see below for my analysis -- no fix yet,
> as I need confirmation from cgroups experts. I can easily create a
> patch that suppresses the warning, but I don't yet know whether this is
> the right thing to do.
Ping? I just hit it on 2.6.36-rc4-mmotm0915. Just wanted to make sure the
issue hadn't been lost/forgotten.
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next prev parent reply other threads:[~2010-09-16 15:12 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-02 8:52 2.6.35-stable/ppc64/p7: suspicious rcu_dereference_check() usage detected during 2.6.35-stable boot Subrata Modak
2010-08-02 8:52 ` Subrata Modak
2010-08-04 14:56 ` Subrata Modak
2010-08-04 14:56 ` Subrata Modak
2010-08-09 16:12 ` Paul E. McKenney
2010-08-09 16:12 ` Paul E. McKenney
2010-08-13 6:55 ` Subrata Modak
2010-08-13 6:55 ` Subrata Modak
2010-08-13 7:42 ` Dhaval Giani
2010-08-13 7:42 ` Dhaval Giani
[not found] ` <1281682514.5976.2.camel-NRFfyExJdYpgXGGE5LP+UZlqa2bBAFbm0E9HWUfgJXw@public.gmane.org>
2010-08-13 7:42 ` Dhaval Giani
[not found] ` <20100809161200.GC3026-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2010-08-13 8:37 ` Subrata Modak
2010-08-13 8:37 ` Subrata Modak
2010-08-13 8:37 ` Subrata Modak
2010-09-16 15:12 ` Valdis.Kletnieks [this message]
2010-09-16 15:12 ` Valdis.Kletnieks
2010-09-16 15:50 ` Peter Zijlstra
2010-09-16 15:50 ` Peter Zijlstra
2010-09-16 15:50 ` Peter Zijlstra
2010-09-16 15:50 ` Peter Zijlstra
2010-09-16 16:12 ` Paul E. McKenney
2010-09-16 16:12 ` Paul E. McKenney
2010-09-16 18:19 ` Subrata Modak
2010-09-16 18:19 ` Subrata Modak
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