From owner-svn-src-head@FreeBSD.ORG Thu Jun 18 13:31:24 2009 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0E65E106566B; Thu, 18 Jun 2009 13:31:24 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from cmail.optima.ua (cmail.optima.ua [195.248.191.121]) by mx1.freebsd.org (Postfix) with ESMTP id 152958FC0A; Thu, 18 Jun 2009 13:31:22 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from orphanage.alkar.net (account mav@alkar.net [212.86.226.11] verified) by cmail.optima.ua (CommuniGate Pro SMTP 5.2.9) with ESMTPA id 246109277; Thu, 18 Jun 2009 16:31:18 +0300 Message-ID: <4A3A41A6.3080404@FreeBSD.org> Date: Thu, 18 Jun 2009 16:31:18 +0300 From: Alexander Motin User-Agent: Thunderbird 2.0.0.14 (X11/20080612) MIME-Version: 1.0 To: Alexander Leidinger References: <200904292117.n3TLHIpt093110@svn.freebsd.org> <20090617150015.18455ggwluk5bcgs@webmail.leidinger.net> <4A38EB41.2080206@FreeBSD.org> <20090618152740.1806764x8heftjv0@webmail.leidinger.net> In-Reply-To: <20090618152740.1806764x8heftjv0@webmail.leidinger.net> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org Subject: Re: svn commit: r191674 - in head/sys/dev/ata: . chipsets X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Jun 2009 13:31:24 -0000 Alexander Leidinger wrote: > Quoting Alexander Motin (from Wed, 17 Jun 2009 > 16:10:25 +0300): > >> Alexander Leidinger wrote: >>> Quoting Alexander Motin (from Wed, 29 Apr 2009 >>> 21:17:18 +0000 (UTC)): > >>>> PARTIAL state has up to 100us (50us for me) wakeup latency, but >>>> for my >>>> ICH8M saves 0.5W of power per drive. SLUMBER state has up to 10ms >>>> (3.5ms >>>> for me) wakeup latency, but saves 0.8W of power. >>>> >>>> Modes 2 and 3 are implemented only for AHCI driver now. >>> >>> Does this mean it is for SATA devices only, or is this a feature of the >>> complete controller (ICH5 in my case) and also works with PATA drives? >> >> This feature is SATA-specific by definition. AFAIK there is no bus power >> management in PATA. > > What happens if such a setting is made for a pata channel, will the > system ignore it? The idea of the question is: can I just add those > hints for all my ata channels on a remote system without getting into > trouble? You can. Nothing happen. It will just set variable that is used only by SATA and AHCI code. PATA does not use it. -- Alexander Motin