linux-kernel - Re: WARNING: at arch/x86/kernel/smpboot.c:324 topology

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Date:	Thu, 6 Feb 2014 18:23:11 +0800
From:	Fengguang Wu <fengguang.wu@...el.com>
To:	Tang Chen <tangchen@...fujitsu.com>
Cc:	Wen Congyang <wency@...fujitsu.com>,
	Linux Memory Management List <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Tang Chen <imtangchen@...il.com>
Subject: Re: WARNING: at arch/x86/kernel/smpboot.c:324 topology_sane()

On Thu, Feb 06, 2014 at 06:05:37PM +0800, Tang Chen wrote:
> On 02/06/2014 05:44 PM, Fengguang Wu wrote:
> >Hi Tang,
> >
> >We noticed the below warning and the first bad commit is
> >
> >commit e8d1955258091e4c92d5a975ebd7fd8a98f5d30f
> >Author:     Tang Chen<tangchen@...fujitsu.com>
> >AuthorDate: Fri Feb 22 16:33:44 2013 -0800
> >Commit:     Linus Torvalds<torvalds@...ux-foundation.org>
> >CommitDate: Sat Feb 23 17:50:14 2013 -0800
> >
> >     acpi, memory-hotplug: parse SRAT before memblock is ready
> 
> Hi Wu,
> 
> This patch has been droped a long time ago. It is not in the latest kernel.
> 
> Now the memory hotplug implementation is done in a different way.

Great, and sorry for the noise! Yeah it's bisected between two old
kernels, I should have checked latest mainline kernel before reporting it.

Thanks,
Fengguang

> >  arch/x86/kernel/setup.c | 13 +++++++++----
> >  arch/x86/mm/numa.c      |  6 ++++--
> >  drivers/acpi/numa.c     | 23 +++++++++++++----------
> >  include/linux/acpi.h    |  8 ++++++++
> >  4 files changed, 34 insertions(+), 16 deletions(-)
> >
> >[    0.845092] smpboot: Booting Node   1, Processors  #1
> >[    0.864812] masked ExtINT on CPU#1
> >[    0.868706] CPU1: Thermal LVT vector (0xfa) already installed
> >[    0.875158] ------------[ cut here ]------------
> >[    0.880330] WARNING: at arch/x86/kernel/smpboot.c:324 topology_sane.isra.2+0x6b/0x7c()
> >[    0.891505] Hardware name: S2600CP
> >[    0.895314] sched: CPU #1's llc-sibling CPU #0 is not on the same node! [node: 1 != 0]. Ignoring dependency.
> >
> >[    0.906295] Modules linked in:
> >[    0.909927] Pid: 0, comm: swapper/1 Not tainted 3.8.0-06530-ge8d1955 #1
> >[    0.917314] Call Trace:
> >[    0.920055]  [<ffffffff81970409>] ? topology_sane.isra.2+0x6b/0x7c
> >[    0.926963]  [<ffffffff810bcd5d>] warn_slowpath_common+0x81/0x99
> >[    0.933667]  [<ffffffff810bcdc1>] warn_slowpath_fmt+0x4c/0x4e
> >[    0.940092]  [<ffffffff8196b565>] ? calibrate_delay+0xae/0x4ba
> >[    0.946612]  [<ffffffff810508ea>] ? __mcheck_cpu_init_timer+0x4a/0x4f
> >[    0.953799]  [<ffffffff81970409>] topology_sane.isra.2+0x6b/0x7c
> >[    0.960509]  [<ffffffff819706e0>] set_cpu_sibling_map+0x28c/0x43a
> >[    0.967308]  [<ffffffff81970a3c>] start_secondary+0x1ae/0x276
> >[    0.973742] ---[ end trace db722b2086ba6d20 ]---
> >[    0.999234]  OK
> >[    1.001655] smpboot: Booting Node   0, Processors  #2
> >
> >Full dmesg and kconfig are attached.
> >
> >Thanks,
> >Fengguang
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