From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
xen-devel@lists.xensource.com
Cc: julie Sullivan <kernelmail.jms@gmail.com>, linux-kernel@vger.kernel.org
Subject: Re: PROBLEM: 3.0-rc kernels unbootable since -rc3
Date: Mon, 11 Jul 2011 12:24:51 -0400 [thread overview]
Message-ID: <20110711162450.GA22913@dumpdata.com> (raw)
In-Reply-To: <20110710231449.GQ6014@linux.vnet.ibm.com>
On Sun, Jul 10, 2011 at 04:14:49PM -0700, Paul E. McKenney wrote:
> On Sun, Jul 10, 2011 at 10:50:48PM +0100, julie Sullivan wrote:
> > > Very cool! Thank you very much for the testing --
.. snip..
> And here is what I am proposing sending upstream. I have your Tested-by,
Hey Paul,
I am hitting a similar bug.
Starting udev Kernel Device Manager...
Starting Configure read-only root support...
[ 79.942067] INFO: rcu_sched_state detected stalls on CPUs/tasks: { 0} (detected by 2, t=60002 jiffies)
[ 79.942089] sending NMI to all CPUs:
when running a 3.0-rc6 under Xen as 32-bit guest (I don't see this issue
when running a 64-bit guest) and when I've more than two CPUs under the guest.
I've tried the patch below against 3.0-rc6 and it did not fix the issue.
I've also tried to use 3.0-rc3 as somewhere in thread one of the reporters mentioned
that it worked for me - but that did not help me.
The config is a Fedora Core based. The stack traces of the four CPUs look
as follow:
CPU0:
Call Trace:
[<c04023a7>] hypercall_page+0x3a7 <--
[<c0405ed5>] xen_safe_halt+0x12
[<c040ea08>] default_idle+0x5a
[<c04081a6>] cpu_idle+0x8e
[<c07da9a9>] rest_init+0x5d
[<c0a86788>] start_kernel+0x34d
[<c0a861c4>] unknown_bootoption
[<c0a860ba>] i386_start_kernel+0xa9
[<c0a895ce>] xen_start_kernel+0x55d
[<c04090b1>] sys_rt_sigreturn+0xb
CPU1 and CPU2:
Call Trace:
[<c04023a7>] hypercall_page+0x3a7 <--
[<c0405ed5>] xen_safe_halt+0x12
[<c040ea08>] default_idle+0x5a
[<c04081a6>] cpu_idle+0x8e
[<c07e5419>] cpu_bringup_and_idle+0xd
CPU3:
Call Trace:
[<c042d0f2>] task_waking_fair+0x11 <--
[<c0439a45>] try_to_wake_up+0xb2
[<c0439b0c>] default_wake_function+0x10
[<c042d4db>] __wake_up_common+0x3b
[<c042ea69>] complete+0x3e
[<c0455e14>] wakeme_after_rcu+0x10
[<c048fd58>] __rcu_process_callbacks+0x172
[<c049080f>] rcu_process_callbacks+0x20
[<c044567d>] __do_softirq+0xa2
[<c04455db>] __do_softirq
[<c040a52d>] do_softirq+0x5a
The full config is http://darnok.org/xen/config-rcu-stall
The full bootup log is http://darnok.org/xen/log-rcu-stall
Any thoughts of what I ought to try? I don't know if there is some missing functionality
in the RCU patches to work under Xen.... Any older version of Linux kernel
you would like me to try?
next prev parent reply other threads:[~2011-07-11 16:25 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-06 21:10 PROBLEM: 3.0-rc kernels unbootable since -rc3 julie Sullivan
2011-07-06 21:23 ` Paul E. McKenney
2011-07-07 19:31 ` Paul E. McKenney
2011-07-07 19:47 ` julie Sullivan
2011-07-07 19:58 ` Paul E. McKenney
2011-07-07 20:28 ` julie Sullivan
2011-07-07 20:47 ` julie Sullivan
2011-07-08 0:29 ` Paul E. McKenney
2011-07-09 10:09 ` Paul E. McKenney
2011-07-10 0:45 ` julie Sullivan
2011-07-10 3:25 ` Paul E. McKenney
2011-07-10 16:38 ` julie Sullivan
2011-07-10 17:16 ` Paul E. McKenney
2011-07-10 17:35 ` Paul E. McKenney
2011-07-10 20:30 ` julie Sullivan
2011-07-10 21:46 ` Paul E. McKenney
2011-07-10 21:50 ` julie Sullivan
2011-07-10 23:14 ` Paul E. McKenney
2011-07-11 16:24 ` Konrad Rzeszutek Wilk [this message]
2011-07-11 17:13 ` Paul E. McKenney
2011-07-11 19:30 ` Konrad Rzeszutek Wilk
2011-07-11 20:15 ` Paul E. McKenney
2011-07-11 21:09 ` Konrad Rzeszutek Wilk
2011-07-12 10:55 ` Paul E. McKenney
2011-07-12 14:12 ` Konrad Rzeszutek Wilk
2011-07-12 14:49 ` Paul E. McKenney
2011-07-12 15:07 ` Paul E. McKenney
2011-07-12 15:15 ` Paul E. McKenney
2011-07-12 15:22 ` Paul E. McKenney
2011-07-12 16:32 ` PROBLEM: 3.0-rc kernels unbootable since -rc3 - under Xen, 32-bit guest only Konrad Rzeszutek Wilk
2011-07-12 16:46 ` Paul E. McKenney
2011-07-12 16:03 ` PROBLEM: 3.0-rc kernels unbootable since -rc3 Konrad Rzeszutek Wilk
2011-07-12 16:39 ` Paul E. McKenney
2011-07-12 18:01 ` Konrad Rzeszutek Wilk
2011-07-12 18:59 ` Paul E. McKenney
2011-07-12 19:07 ` Konrad Rzeszutek Wilk
2011-07-12 20:52 ` Paul E. McKenney
2011-07-12 19:10 ` Peter Zijlstra
2011-07-12 19:57 ` Konrad Rzeszutek Wilk
2011-07-12 20:46 ` Paul E. McKenney
2011-07-12 21:04 ` Julie Sullivan
2011-07-12 21:07 ` Paul E. McKenney
2011-07-12 20:05 ` Paul E. McKenney
2011-07-12 6:33 ` [Xen-devel] " Sander Eikelenboom
2011-07-12 14:05 ` Paul E. McKenney
[not found] ` <CAAVPGOMSprJSkzziH6hJv9PweOONzsMaRZEK2ZSrV3xFBReTPw@mail.gmail.com>
[not found] ` <20110711214301.GP2245@linux.vnet.ibm.com>
2011-07-12 21:15 ` Julie Sullivan
2011-07-12 21:29 ` Paul E. McKenney
2011-07-12 21:35 ` Julie Sullivan
2011-07-12 21:49 ` Julie Sullivan
2011-07-12 22:00 ` Paul E. McKenney
2011-07-13 7:18 ` RKK
2011-07-13 15:47 ` Paul E. McKenney
2011-07-13 20:57 ` Julie Sullivan
2011-07-13 21:23 ` Paul E. McKenney
2011-07-07 17:28 ` julie Sullivan
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