Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750842AbVL3EAF (ORCPT ); Thu, 29 Dec 2005 23:00:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750929AbVL3EAF (ORCPT ); Thu, 29 Dec 2005 23:00:05 -0500 Received: from main.gmane.org ([80.91.229.2]:14242 "EHLO ciao.gmane.org") by vger.kernel.org with ESMTP id S1750842AbVL3EAC (ORCPT ); Thu, 29 Dec 2005 23:00:02 -0500 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Gunter Ohrner Subject: cpufreq: powernow-k8 frequency transitions question Date: Fri, 30 Dec 2005 05:00:09 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 8Bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 212.117.85.171 User-Agent: KNode/0.10 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1548 Lines: 33 Hi! I'm currently reading and playing with the powernow-k8 cpufreq driver module. However so far I wasn't able to find out how frequency transitions are dealt with that have to be made using intermediate steps, ie. transitions which cannot be done in one single step. (I read about this at http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26094.PDF p. 269f.) I found safety guards which return an error if an invalid frequency transition ("lo-lo transition") is requested. Is this the only support for these transitions currently implemented or did I miss something? Is there more advanced support simply missing, or is the current behaviour sufficient, and if yes, why does this suffice? How do the conservative/ondemand cpufreq governors cope with the kernel advertising frequencies it cannot directly transition between? I'd be really cool if someone could enlighten me, just some pointers at powernow-k8.c functions I should take a closer look at might already help. :-) Greetings, Gunter -- Due to hw failure, I'm thinking buying a new laptop. I would like to know what is the worst laptop with ACPI atm? -- Linux ACPI driver hacker Bruno Ducrot looking for a "good" laptop... ;) *** PGP-Verschl?sselung bei eMails erw?nscht :-) *** PGP: 0x1128F25F *** - 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/