Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758562Ab3IBKcP (ORCPT ); Mon, 2 Sep 2013 06:32:15 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:44353 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1758539Ab3IBKcN (ORCPT ); Mon, 2 Sep 2013 06:32:13 -0400 X-IronPort-AV: E=Sophos;i="4.89,1006,1367942400"; d="scan'208";a="8376278" From: Tang Chen To: mingo@redhat.com, hpa@zytor.com, yinghai@kernel.org, penberg@kernel.org, jacob.shin@amd.com, tglx@linutronix.de, lenb@kernel.org, rjw@sisk.pl Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, x86@kernel.org Subject: [PATCH RESEND 2/3] x86, mm: Update min_pfn_mapped in add_pfn_range_mapped(). Date: Mon, 2 Sep 2013 18:30:28 +0800 Message-Id: <1378117829-9095-3-git-send-email-tangchen@cn.fujitsu.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1378117829-9095-1-git-send-email-tangchen@cn.fujitsu.com> References: <1378117829-9095-1-git-send-email-tangchen@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/09/02 18:29:37, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/09/02 18:29:38, Serialize complete at 2013/09/02 18:29:38 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1758 Lines: 52 In current kernel, we update min_pfn_mapped and max_pfn_mapped like this: init_mem_mapping() { while ( a loop iterates all memory ranges ) { init_range_memory_mapping(); |->init_memory_mapping() |->kernel_physical_mapping_init() |->add_pfn_range_mapped() |-> update max_pfn_mapped; update min_pfn_mapped; } } max_pfn_mapped is updated in add_pfn_range_mapped() when a range of memory is mapped. But min_pfn_mapped is updated in init_mem_mapping(). We can also update min_pfn_mapped in add_pfn_range_mapped(). Signed-off-by: Tang Chen --- arch/x86/mm/init.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 5b2eaca..a97749f 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -313,6 +313,7 @@ static void add_pfn_range_mapped(unsigned long start_pfn, unsigned long end_pfn) nr_pfn_mapped = clean_sort_range(pfn_mapped, E820_X_MAX); max_pfn_mapped = max(max_pfn_mapped, end_pfn); + min_pfn_mapped = min(min_pfn_mapped, start_pfn); } bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn) @@ -442,7 +443,6 @@ void __init init_mem_mapping(void) new_mapped_ram_size = init_range_memory_mapping(start, last_start); last_start = start; - min_pfn_mapped = last_start >> PAGE_SHIFT; /* only increase step_size after big range get mapped */ if (new_mapped_ram_size > mapped_ram_size) step_size <<= STEP_SIZE_SHIFT; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/