linux-kernel - [PATCH v3, x86]: Use selfsnoop HW feature to manage conflicting memory types

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Message-ID: <AANLkTimtWoqST8ch9CyB3g-CyvfiynXRDLwmGdLDdiYk@mail.gmail.com>
Date:	Sun, 14 Nov 2010 19:33:34 +0100
From:	Uros Bizjak <ubizjak@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org
Subject: [PATCH v3, x86]: Use selfsnoop HW feature to manage conflicting
 memory types

Hello!

Attached patch enhances v2 patch at [1] to disable selfsnoop with a
kernel command line parameter. The feature is also disabled on all
processors earlier than Core 2 due to Pentium-M errata.

I have investigated the erratas in this area and documented the one
found in the source.

The patch was tested on 4 core i7 (8 threads) and there were no
problems at all with the patched kernel.

[1] http://lkml.org/lkml/2009/4/8/508

Signed-off-by: Uros Bizjak <ubizjak@...il.com>

Download attachment "selfsnoop.patch" of type "application/octet-stream" (3188 bytes)