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From: Pavel Krauz <krauz@cncz.cz>
To: linux-kernel@vger.kernel.org
Subject: wrong NUMA detection on HP385 G2
Date: Mon, 19 Nov 2007 15:43:30 +0100	[thread overview]
Message-ID: <200711191543.30665.krauz@cncz.cz> (raw)

Hello
my HP 385 G2 - 2x dual core Opteron 2216 running 2.6.23.1 with NUMA support says the following:

cat /sys/devices/system/node/node0/cpumap
0000000f

cat /sys/devices/system/node/node1/cpumap
00000000

and really in the node0 there are 4 sym links to cpu0-3 and there is no sym link in node1 subdirectory.
I do not think this is correct.
Consequently (I think because of this) the numa_run_on_node() function does not work correctly.

Furthermore kernel panics during boot (under Centos 5.0) with 2.6.23.1 and 2.6.22.12 with NUMA when
the machine is configured with less memory than it really has: with mem=3072M kernel boot parameter and 4GB of physical memory. 
Has anybody tried to boot NUMA enabled kernel with less memory configured than physical on dual Opteron system?

Thanks and b.r.
Pavel Krauz

             reply	other threads:[~2007-11-19 15:09 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-19 14:43 Pavel Krauz [this message]
2007-11-20  3:40 ` Andi Kleen
2007-11-20 14:06 ` Pavel Krauz
2007-11-21 13:11   ` Andi Kleen

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