linux-kernel - [PATCH 0/5 v6] x86: Adapt CPU topology detection for AMD Magny-Cours

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Message-ID: <20090831125349.GA21867@alberich.amd.com>
Date:	Mon, 31 Aug 2009 14:53:49 +0200
From:	Andreas Herrmann <andreas.herrmann3@....com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	Borislav Petkov <borislav.petkov@....com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/5 v6] x86: Adapt CPU topology detection for AMD
	Magny-Cours

Hi,

Another version of patches to fix topology issues for AMD multi-node
processors. This time w/o introduction of new /sysfs attributes or
additional log messages.
It is just the pure stuff that is needed to fix some oddities
that occur when Linux is booted on Magny-Cours.

Please apply the patches. They should go into .32.

Users who are interested in which CPUs belong to the same internal
node have to check shared_cpu_map of L3 cache (i.e.
/sys/devices/system/cpu/cpuXY/cache/index3/shared_cpu_map or
/sys/devices/system/cpu/cpuXY/cache/index3/shared_cpu_list)

Boris might be interested in cpuinfo_x86->cpu_node_id. I use it to
store the entire NodeId  of AMD CPUs. That should be convenient
enough to find out the northbridge of a CPU in the EDAC driver.

The scheduler stuff is in flux in general and I don't expect that
scheduler gets fixed for Magny-Cours with .32. So be aware that
changing to power savings scheduling might bring down your multi-node
processor system.

Regards,
Andreas

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