From patchwork Thu Jan 21 06:28:07 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 74275 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.2) with ESMTP id o0L6YtpT012265 for ; Thu, 21 Jan 2010 06:34:57 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754920Ab0AUGdj (ORCPT ); Thu, 21 Jan 2010 01:33:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754532Ab0AUGdi (ORCPT ); Thu, 21 Jan 2010 01:33:38 -0500 Received: from sca-es-mail-2.Sun.COM ([192.18.43.133]:38828 "EHLO sca-es-mail-2.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754546Ab0AUG3X (ORCPT ); Thu, 21 Jan 2010 01:29:23 -0500 Received: from fe-sfbay-09.sun.com ([192.18.43.129]) by sca-es-mail-2.sun.com (8.13.7+Sun/8.12.9) with ESMTP id o0L6TNA5014484; Wed, 20 Jan 2010 22:29:23 -0800 (PST) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: TEXT/PLAIN Received: from conversion-daemon.fe-sfbay-09.sun.com by fe-sfbay-09.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) id <0KWL00600396VF00@fe-sfbay-09.sun.com>; Wed, 20 Jan 2010 22:29:23 -0800 (PST) Received: from localhost.localdomain ([unknown] [75.36.251.46]) by fe-sfbay-09.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) with ESMTPSA id <0KWL003MR3C23V10@fe-sfbay-09.sun.com>; Wed, 20 Jan 2010 22:29:14 -0800 (PST) Date: Wed, 20 Jan 2010 22:28:07 -0800 From: Yinghai Lu Subject: [PATCH 20/36] early_res: enhance check_and_double_early_res In-reply-to: <1264055303-15123-1-git-send-email-yinghai@kernel.org> To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton , Jesse Barnes , Christoph Lameter Cc: Linus Torvalds , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Yinghai Lu Message-id: <1264055303-15123-21-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.6.4.2 References: <1264055303-15123-1-git-send-email-yinghai@kernel.org> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org diff --git a/arch/x86/kernel/early_res.c b/arch/x86/kernel/early_res.c index d0a70cc..52804e9 100644 --- a/arch/x86/kernel/early_res.c +++ b/arch/x86/kernel/early_res.c @@ -180,9 +180,9 @@ void __init reserve_early_overlap_ok(u64 start, u64 end, char *name) __reserve_early(start, end, name, 1); } -static void __init __check_and_double_early_res(u64 start) +static void __init __check_and_double_early_res(u64 ex_start, u64 ex_end) { - u64 end, size, mem; + u64 start, end, size, mem; struct early_res *new; /* do we have enough slots left ? */ @@ -190,10 +190,23 @@ static void __init __check_and_double_early_res(u64 start) return; /* double it */ - end = max_pfn_mapped << PAGE_SHIFT; + mem = -1ULL; size = sizeof(struct early_res) * max_early_res * 2; - mem = find_e820_area(start, end, size, sizeof(struct early_res)); - + if (early_res == early_res_x) + start = 0; + else + start = early_res[0].end; + end = ex_start; + if (start + size < end) + mem = find_e820_area(start, end, size, + sizeof(struct early_res)); + if (mem == -1ULL) { + start = ex_end; + end = max_pfn_mapped << PAGE_SHIFT; + if (start + size < end) + mem = find_e820_area(start, end, size, + sizeof(struct early_res)); + } if (mem == -1ULL) panic("can not find more space for early_res array"); @@ -235,7 +248,7 @@ void __init reserve_early(u64 start, u64 end, char *name) if (start >= end) return; - __check_and_double_early_res(end); + __check_and_double_early_res(start, end); drop_overlaps_that_are_ok(start, end); __reserve_early(start, end, name, 0); @@ -248,7 +261,7 @@ void __init reserve_early_without_check(u64 start, u64 end, char *name) if (start >= end) return; - __check_and_double_early_res(end); + __check_and_double_early_res(start, end); r = &early_res[early_res_count];