From patchwork Fri Jan 22 09:24:19 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 74570 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 o0M9YWUE009625 for ; Fri, 22 Jan 2010 09:34:33 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753282Ab0AVJeT (ORCPT ); Fri, 22 Jan 2010 04:34:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753268Ab0AVJZl (ORCPT ); Fri, 22 Jan 2010 04:25:41 -0500 Received: from sca-es-mail-1.Sun.COM ([192.18.43.132]:53886 "EHLO sca-es-mail-1.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753222Ab0AVJZg (ORCPT ); Fri, 22 Jan 2010 04:25:36 -0500 Received: from fe-sfbay-10.sun.com ([192.18.43.129]) by sca-es-mail-1.sun.com (8.13.7+Sun/8.12.9) with ESMTP id o0M9Pa8X017261; Fri, 22 Jan 2010 01:25:36 -0800 (PST) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: TEXT/PLAIN Received: from conversion-daemon.fe-sfbay-10.sun.com by fe-sfbay-10.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) id <0KWN00E005YCZE00@fe-sfbay-10.sun.com>; Fri, 22 Jan 2010 01:25:36 -0800 (PST) Received: from localhost.localdomain ([unknown] [75.36.240.128]) by fe-sfbay-10.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) with ESMTPSA id <0KWN00C0Y662A4B0@fe-sfbay-10.sun.com>; Fri, 22 Jan 2010 01:25:31 -0800 (PST) Date: Fri, 22 Jan 2010 01:24:19 -0800 From: Yinghai Lu Subject: [PATCH 10/38] x86: dynamic increase early_res array size In-reply-to: <1264152287-13866-1-git-send-email-yinghai@kernel.org> To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton , Linus Torvalds Cc: Jesse Barnes , Christoph Lameter , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Yinghai Lu Message-id: <1264152287-13866-11-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.6.4.2 References: <1264152287-13866-1-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/e820.c b/arch/x86/kernel/e820.c index 291f6d2..949d688 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -908,6 +908,48 @@ 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) +{ + u64 end, size, mem; + struct early_res *new; + + /* do we have enough slots left ? */ + if ((max_early_res - early_res_count) > max(max_early_res/8, 2)) + return; + + /* double it */ + end = max_pfn_mapped << PAGE_SHIFT; + size = sizeof(struct early_res) * max_early_res * 2; + mem = find_e820_area(start, end, size, sizeof(struct early_res)); + + if (mem == -1ULL) + panic("can not find more space for early_res array"); + + new = __va(mem); + /* save the first one for own */ + new[0].start = mem; + new[0].end = mem + size; + new[0].overlap_ok = 0; + /* copy old to new */ + if (early_res == early_res_x) { + memcpy(&new[1], &early_res[0], + sizeof(struct early_res) * max_early_res); + memset(&new[max_early_res+1], 0, + sizeof(struct early_res) * (max_early_res - 1)); + early_res_count++; + } else { + memcpy(&new[1], &early_res[1], + sizeof(struct early_res) * (max_early_res - 1)); + memset(&new[max_early_res], 0, + sizeof(struct early_res) * max_early_res); + } + memset(&early_res[0], 0, sizeof(struct early_res) * max_early_res); + early_res = new; + max_early_res *= 2; + printk(KERN_DEBUG "early_res array is doubled to %d at [%llx - %llx]\n", + max_early_res, mem, mem + size - 1); +} + /* * Most early reservations come here. * @@ -921,6 +963,8 @@ void __init reserve_early(u64 start, u64 end, char *name) if (start >= end) return; + __check_and_double_early_res(end); + drop_overlaps_that_are_ok(start, end); __reserve_early(start, end, name, 0); } @@ -949,6 +993,10 @@ void __init early_res_to_bootmem(u64 start, u64 end) for (i = 0; i < max_early_res && early_res[i].end; i++) count++; + /* need to skip first one ?*/ + if (early_res != early_res_x) + idx = 1; + printk(KERN_INFO "(%d/%d early reservations) ==> bootmem [%010llx - %010llx]\n", count - idx, max_early_res, start, end); for (i = idx; i < count; i++) { @@ -966,6 +1014,11 @@ void __init early_res_to_bootmem(u64 start, u64 end) reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT); } + /* clear them */ + memset(&early_res[0], 0, sizeof(struct early_res) * max_early_res); + early_res = NULL; + max_early_res = 0; + early_res_count = 0; } /* Check for already reserved areas */