linux-kernel - Re: [tip:sched/core] sched/numa: Rewrite the CONFIG

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Date:	Thu, 10 May 2012 10:54:19 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	mingo@...nel.org, torvalds@...ux-foundation.org,
	cmetcalf@...era.com, tony.luck@...el.com, sivanich@....com,
	akpm@...ux-foundation.org, ralf@...ux-mips.org,
	greg.pearson@...com, ink@...assic.park.msu.ru, tglx@...utronix.de,
	rth@...ddle.net, kamezawa.hiroyu@...fujitsu.com, paulus@...ba.org,
	linux-kernel@...r.kernel.org, hpa@...or.com, anton@...ba.org,
	lethal@...ux-sh.org, davem@...emloft.net, benh@...nel.crashing.org,
	dhowells@...hat.com, mattst88@...il.com, fenghua.yu@...el.com,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/core] sched/numa: Rewrite the CONFIG_NUMA sched domain support

On Thu, May 10, 2012 at 10:44 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> On Thu, 2012-05-10 at 10:30 -0700, Yinghai Lu wrote:
>> not sure if this one or other is related....
>>
>> got this from 8 socket Nehalem-ex box.
>>
>> [   25.549259] mtrr_aps_init() done
>> [   25.554298] ------------[ cut here ]------------
>> [   25.554549] WARNING: at kernel/sched/core.c:6086 build_sched_domains+0x1a9/0x2d0()
>
> oops,.. could you get me the output of:
>
>  cat /sys/devices/system/node/node*/distance
>
> for that machine? I'll see if I can reproduce using numa=fake.

[    0.000000] ACPI: SLIT: nodes = 8
[    0.000000]    10 15 20 15 15 20 20 20
[    0.000000]    15 10 15 20 20 15 20 20
[    0.000000]    20 15 10 15 20 20 15 20
[    0.000000]    15 20 15 10 20 20 20 15
[    0.000000]    15 20 20 20 10 15 15 20
[    0.000000]    20 15 20 20 15 10 20 15
[    0.000000]    20 20 15 20 15 20 10 15
[    0.000000]    20 20 20 15 20 15 15 10


[root@...u-pc2 ~]# cat /sys/devices/system/node/node*/distance
10 15 15 20 15 20 20 20
15 10 20 15 20 15 20 20
15 20 10 15 20 20 15 20
20 15 15 10 20 20 20 15
15 20 20 20 10 15 20 15
20 15 20 20 15 10 15 20
20 20 15 20 20 15 10 15
20 20 20 15 15 20 15 10
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