From: Andi Kleen <andi@firstfloor.org>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>,
mingo@elte.hu, linux-kernel@vger.kernel.org, rjw@sisk.pl,
dipankar@in.ibm.com, tglx@linuxtronix.de
Subject: Re: RCU hang on cpu re-hotplug with 2.6.27rc8
Date: Tue, 7 Oct 2008 23:09:47 +0200 [thread overview]
Message-ID: <20081007210947.GP20740@one.firstfloor.org> (raw)
In-Reply-To: <20081007163401.GJ6384@linux.vnet.ibm.com>
On Tue, Oct 07, 2008 at 09:34:01AM -0700, Paul E. McKenney wrote:
> Thank you! Hmmm, classic RCU, worked just fine in 2.6.27-rc7 with
> Thomas's patch. I was doing random onlines and offlines in a loop,
> with about 3 seconds between each operation continuously for more than
> ten hours, both x86 and Power. So could you please try 2.6.27-rc7 with
> Thomas's patch as follows?
>
> http://www.rdrop.com/users/paulmck/patches/2.6.27-rc7-tglx-timer-1.patch
Same effect. Hung on the first try
bash D 00000000ffff25c1 0 4755 4742
ffff88027b127bf8 0000000000000086 ffff88027b127c18 0000000000000296
ffff88027c80b330 ffff8804be488b90 ffff88027c80b578 0000000300000296
ffff88027b127c18 ffffffff808cbd18 ffff88002805d600 ffff88027d182098
Call Trace:
[<ffffffff805c318d>] schedule_timeout+0x22/0xb4
[<ffffffff8020a029>] ? __switch_to+0x320/0x330
[<ffffffff8025fa65>] ? cpupri_set+0xc5/0xd8
[<ffffffff805c2fe7>] wait_for_common+0xcd/0x131
[<ffffffff8022d297>] ? default_wake_function+0x0/0xf
[<ffffffff805c30d5>] wait_for_completion+0x18/0x1a
[<ffffffff8024374b>] synchronize_rcu+0x35/0x3c
[<ffffffff802437ca>] ? wakeme_after_rcu+0x0/0x12
[<ffffffff8022e435>] partition_sched_domains+0x9b/0x1dd
[<ffffffff8022d2c3>] ? wake_up_process+0x10/0x12
[<ffffffff8022e5a5>] update_sched_domains+0x2e/0x35
[<ffffffff805c6bb2>] notifier_call_chain+0x33/0x5b
[<ffffffff80248a29>] __raw_notifier_call_chain+0x9/0xb
[<ffffffff80248a3a>] raw_notifier_call_chain+0xf/0x11
[<ffffffff805c06e6>] _cpu_up+0xd3/0x10c
[<ffffffff805c0776>] cpu_up+0x57/0x67
[<ffffffff805a4ab7>] store_online+0x4d/0x75
[<ffffffff803e5d0b>] sysdev_store+0x1b/0x1d
[<ffffffff802cc49c>] sysfs_write_file+0xe0/0x11c
[<ffffffff8028ad1d>] vfs_write+0xae/0x137
[<ffffffff8028b1c6>] sys_write+0x47/0x6f
[<ffffffff8020b36b>] system_call_fastpath+0x16/0x1b
-Andi
--
ak@linux.intel.com
next prev parent reply other threads:[~2008-10-07 21:03 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-06 14:12 scheduler hang on cpu re-hotplug with 2.6.27rc8 Andi Kleen
2008-10-06 23:28 ` RCU " Andi Kleen
2008-10-07 3:08 ` Paul E. McKenney
2008-10-07 7:15 ` Andi Kleen
2008-10-07 15:26 ` Paul E. McKenney
2008-10-07 15:49 ` Andi Kleen
2008-10-07 16:34 ` Paul E. McKenney
2008-10-07 21:09 ` Andi Kleen [this message]
2008-10-07 21:22 ` Paul E. McKenney
2008-10-09 1:08 ` [PATCH] rudimentary tracing for Classic RCU Paul E. McKenney
2008-10-09 6:20 ` Lai Jiangshan
2008-10-09 6:55 ` Andi Kleen
2008-10-09 7:05 ` Lai Jiangshan
2008-10-09 7:14 ` KOSAKI Motohiro
2008-10-09 7:26 ` Lai Jiangshan
2008-10-09 8:06 ` Andi Kleen
2008-10-10 11:48 ` Paul E. McKenney
2008-10-09 11:50 ` Paul E. McKenney
2008-10-09 11:50 ` Paul E. McKenney
2008-10-09 10:23 ` Frédéric Weisbecker
2008-10-09 10:53 ` Andi Kleen
2008-10-09 11:44 ` Frédéric Weisbecker
2008-10-09 11:54 ` Paul E. McKenney
2008-10-09 13:01 ` Frédéric Weisbecker
2008-10-10 3:44 ` [PATCH] v2 " Paul E. McKenney
2008-10-13 23:09 ` [PATCH] v3 " Paul E. McKenney
2008-10-14 3:53 ` Lai Jiangshan
2008-10-14 14:35 ` Paul E. McKenney
2008-10-23 11:12 ` Lai Jiangshan
2008-10-26 21:59 ` Paul E. McKenney
2008-10-27 21:50 ` Paul E. McKenney
2008-10-27 23:57 ` Paul E. McKenney
2008-10-29 1:16 ` Paul E. McKenney
2008-10-29 1:31 ` Lai Jiangshan
2008-10-30 15:52 ` Paul E. McKenney
2008-10-09 1:33 ` RCU hang on cpu re-hotplug with 2.6.27rc8 Paul E. McKenney
2008-10-09 4:56 ` Andi Kleen
2008-10-09 7:24 ` Thomas Gleixner
2008-10-09 8:22 ` Andi Kleen
2008-10-09 11:44 ` Paul E. McKenney
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