linux-kernel - sched: CPU #1's llc-sibling CPU #0 is not on the same node!

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Date:	Mon, 25 Feb 2013 08:02:40 -0700
From:	Tim Gardner <timg@....com>
To:	linux-kernel@...r.kernel.org
CC:	tglx@...utronix.de, mingo@...hat.com,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	a.p.zijlstra@...llo.nl, jarkko.sakkinen@...el.com
Subject: sched: CPU #1's llc-sibling CPU #0 is not on the same node!

Is this an expected warning ? I'll boot a vanilla kernel just to be sure.

rebased against ab7826595e9ec51a51f622c5fc91e2f59440481a in Linus' repo:

[    0.181441] WARNING: at
/home/rtg/ukb/raring/amd64/unstable-3.9/ubuntu-raring/arch/x86/kernel/smpboot.c:324
topology_sane.isra.2+0x6f/0x80()
[    0.181443] Hardware name: S2600CP
[    0.181445] sched: CPU #1's llc-sibling CPU #0 is not on the same
node! [node: 1 != 0]. Ignoring dependency.
[    0.166925] smpboot: Booting Node   1, Processors  #1
[    0.181446] Modules linked in:
[    0.181451] Pid: 0, comm: swapper/1 Not tainted 3.9.0-0-generic #1
[    0.181452] Call Trace:
[    0.181457]  [<ffffffff816c0270>] ? topology_sane.isra.2+0x6f/0x80
[    0.181463]  [<ffffffff8105914f>] warn_slowpath_common+0x7f/0xc0
[    0.181469]  [<ffffffff8105924c>] warn_slowpath_fmt+0x4c/0x50
[    0.181473]  [<ffffffff816bf737>] ? mcheck_cpu_init+0x378/0x3fb
[    0.181478]  [<ffffffff816ca32b>] ? cpuid_eax+0x27/0x2e
[    0.181483]  [<ffffffff816c0270>] topology_sane.isra.2+0x6f/0x80
[    0.181488]  [<ffffffff816c0534>] set_cpu_sibling_map+0x279/0x449
[    0.181493]  [<ffffffff816c0821>] start_secondary+0x11d/0x1e5
[    0.181507] ---[ end trace 8c24ebb220b8c665 ]---

This is a Sandy Bridge 2-way server. See attached. Do you need anything
else ?

rtg
-- 
Tim Gardner timg@....com www.tpi.com
OR 503-601-0234 x102 MT 406-443-5357

View attachment "config" of type "text/plain" (157429 bytes)

View attachment "dmesg.txt" of type "text/plain" (117865 bytes)

View attachment "lspci.txt" of type "text/plain" (62102 bytes)