From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752477Ab0JMQPj (ORCPT ); Wed, 13 Oct 2010 12:15:39 -0400 Received: from g4t0014.houston.hp.com ([15.201.24.17]:10643 "EHLO g4t0014.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752399Ab0JMQPh (ORCPT ); Wed, 13 Oct 2010 12:15:37 -0400 Subject: [PATCH v3 6/6] x86: allocate space within a region top-down To: Jesse Barnes From: Bjorn Helgaas Cc: Bob Picco , Brian Bloniarz , Charles Butterfield , Denys Vlasenko , linux-pci@vger.kernel.org, "Horst H. von Brand" , linux-kernel@vger.kernel.org, Stefan Becker , "H. Peter Anvin" , Yinghai Lu , Thomas Gleixner , Linus Torvalds , Ingo Molnar Date: Wed, 13 Oct 2010 10:15:36 -0600 Message-ID: <20101013161536.28476.31047.stgit@bob.kio> In-Reply-To: <20101013161359.28476.6050.stgit@bob.kio> References: <20101013161359.28476.6050.stgit@bob.kio> User-Agent: StGit/0.15 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Request that allocate_resource() use available space from high addresses first, rather than the default of using low addresses first. The most common place this makes a difference is when we move or assign new PCI device resources. Low addresses are generally scarce, so it's better to use high addresses when possible. This follows Windows practice for PCI allocation. Reference: https://bugzilla.kernel.org/show_bug.cgi?id=16228#c42 Signed-off-by: Bjorn Helgaas --- arch/x86/include/asm/io.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index 30a3e97..6cc02c4 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -35,6 +35,7 @@ */ #define ARCH_HAS_IOREMAP_WC +#define ARCH_HAS_TOP_DOWN_ALLOC #include #include