From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: [PATCH] ACPI: make acpi_idle Nehalem-aware Date: Tue, 3 Aug 2010 09:05:14 +0200 Message-ID: <20100803070514.GA31096@basil.fritz.box> References: <20100430174447.GA14889@srcf.ucam.org> <20100525124325.GC7876@srcf.ucam.org> <20100525185507.GA15997@srcf.ucam.org> <20100803065514.GE3344@ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from one.firstfloor.org ([213.235.205.2]:50176 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755229Ab0HCHFU (ORCPT ); Tue, 3 Aug 2010 03:05:20 -0400 Content-Disposition: inline In-Reply-To: <20100803065514.GE3344@ucw.cz> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Pavel Machek Cc: Len Brown , Matthew Garrett , "Yu, Luming" , Philip Langdale , Jeff Garrett , Andi Kleen , Linux Kernel Mailing List , "linux-acpi@vger.kernel.org" , "venki@google.com" On Tue, Aug 03, 2010 at 08:55:14AM +0200, Pavel Machek wrote: > On Wed 2010-07-21 17:31:27, Len Brown wrote: > > From: Len Brown > > > > The BIOS exports deep C-states on modern Intel processors > > as "C3-type" to satisfy various legacy Operating Systems. > > Can you elaborate on this? I though the only difference between > C2-type and C3-type is busmastering... The main difference is latency. -Andi -- ak@linux.intel.com -- Speaking for myself only.