From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Larry Baker <baker@usgs.gov>
Cc: linux-acpi@vger.kernel.org, Rob E Russell <robr@us.ibm.com>
Subject: Re: Wishlist: Disable C6 in intel_idle for Model 44 processors
Date: Wed, 12 Jun 2013 14:40:02 +0100 [thread overview]
Message-ID: <20130612134002.GA15317@srcf.ucam.org> (raw)
In-Reply-To: <38D8523B-C50E-4D81-A9E2-526292B19AF3@usgs.gov>
On Tue, Jun 11, 2013 at 02:30:30PM -0700, Larry Baker wrote:
> I have an IBM System x3650 M3 with an Intel Xeon L5630 processor. My IBM support team alerted me to an issue with C6 states for those processors when running Linux and the intel_idle kernel module is used. The IBM solutions page, http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=migr-5091901, recommends disabling intel_idle. I propose intel_idle disable C6 for the affected processors.
As you note:
> > Workaround:
> > It is possible for the BIOS to contain a workaround for this erratum.
Are you actually seeing this specific problem? If so, you should
probably request a firmware update from IBM. If that's not a
possibility, and if it is necessary to disable package C6 in this
situation, it'd be nice to determine what the BIOS workaround actually
does and limit the quirk to that case.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2013-06-12 13:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-11 21:30 Wishlist: Disable C6 in intel_idle for Model 44 processors Larry Baker
2013-06-11 21:34 ` Larry Baker
2013-06-12 13:40 ` Matthew Garrett [this message]
2013-06-12 18:11 ` Larry Baker
2013-06-12 18:32 ` Matthew Garrett
2013-06-14 19:32 ` Len Brown
2013-06-14 20:23 ` Larry Baker
[not found] ` <OF3D706B0A.D5540D6C-ON85257B8A.0076278F-85257B8A.0076E4B1@us.ibm.com>
2013-06-14 22:40 ` Larry Baker
2013-06-20 19:22 ` Larry Baker
2013-06-16 3:29 ` Henrique de Moraes Holschuh
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