Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754024Ab1CZJ5d (ORCPT ); Sat, 26 Mar 2011 05:57:33 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:53198 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752786Ab1CZJ5b (ORCPT ); Sat, 26 Mar 2011 05:57:31 -0400 Date: Sat, 26 Mar 2011 10:57:09 +0100 From: Ingo Molnar To: Eric Dumazet Cc: Peter Zijlstra , Andi Kleen , Linus Torvalds , Jack Steiner , Jan Beulich , Borislav Petkov , Nick Piggin , "x86@kernel.org" , Thomas Gleixner , Andrew Morton , Ingo Molnar , tee@sgi.com, Nikanth Karthikesan , "linux-kernel@vger.kernel.org" , "H. Peter Anvin" Subject: Re: [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock if possible Message-ID: <20110326095709.GB8706@elte.hu> References: <1300999682.2714.23.camel@edumazet-laptop> <20110324205422.GB2393@elte.hu> <1301000557.2714.33.camel@edumazet-laptop> <20110324235654.GM21838@one.firstfloor.org> <1301032040.2714.569.camel@edumazet-laptop> <1301045882.3268.2.camel@edumazet-laptop> <1301084980.2250.305.camel@laptop> <1301127327.2979.54.camel@edumazet-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1301127327.2979.54.camel@edumazet-laptop> User-Agent: Mutt/1.5.20 (2009-08-17) X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.5 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1952 Lines: 65 * Eric Dumazet wrote: > > > > By doing the above the BIOS should release the performance counter, and > > > > the kernel's "perf" should not encounter a conflict. > > > > > > > > The document that you are looking for is here: (please see page 8 and > > > > later): > > > > http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01804533/c01804533.pdf > > Thanks Peter ! > > I was not aware of the hidden "CTRL-A" feature on RBSU, so I never met these > configuration settings ("Service Options" added in main menu) > > I already was in "Power regulator mode : Static High mode" QPI Link power > management : Disabled > > I have latest released I24 BIOS > DMI: HP ProLiant BL460c G6, BIOS I24 01/29/2011 > > 1) I disabled "Power and Utilization Monitoring" _and_ "Memory > Pre-Failure Notification" > > Still I got the 'MSR 38d is 330' error > > 2) I then disabled Intel Turbo boost > > Same error > > 3) Minimum Processor idle Power state > From C1E-State --> No C-states > > Same error > > Tricky isnt it ? This kind of user-configurability reminds me of Mr. Prosser from the local council who wants to knock down Arthur Dent’s house with a bulldozer to make way for a new bypass: "But the plans were on display ..." "On display? I eventually had to go down to the cellar to find them." "That's the display department." "With a flashlight." "Ah, well the lights had probably gone." "So had the stairs." "But look, you found the notice didn't you?" "Yes," said Arthur, "yes I did. It was on display in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying 'Beware of the Leopard'." Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/