Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756827AbYFXUDr (ORCPT ); Tue, 24 Jun 2008 16:03:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753357AbYFXUDe (ORCPT ); Tue, 24 Jun 2008 16:03:34 -0400 Received: from py-out-1112.google.com ([64.233.166.177]:53235 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753233AbYFXUDd (ORCPT ); Tue, 24 Jun 2008 16:03:33 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=em1YsUqtoy1xZuBDXjmYX3b3oHs6cE/oAbARjzqlvPjVobD+dGTxgx/++L1cQJYnqS Mq7CJqCyzwok9w1W0SPeM7bJ/N2rO0pqlf9TFiMrGKppkPLHX0ExmFNNrWE60DnrR7nU 6efTjTB4+QQcDtsU23+DlbtGKIuHe1jTnAm8Y= Message-ID: <86802c440806241303p26b2242k43fea42f106125fa@mail.gmail.com> Date: Tue, 24 Jun 2008 13:03:31 -0700 From: "Yinghai Lu" To: "Bernhard Walle" , "Ingo Molnar" Subject: Re: [PATCH 3/3] Limit E820 map when a user-defined memory map is specified Cc: x86@kernel.org, vgoyal@redhat.com, linux-kernel@vger.kernel.org In-Reply-To: <1214318125-32619-4-git-send-email-bwalle@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <1214318125-32619-1-git-send-email-bwalle@suse.de> <1214318125-32619-4-git-send-email-bwalle@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1771 Lines: 47 On Tue, Jun 24, 2008 at 7:35 AM, Bernhard Walle wrote: > This patch brings back limiting of the E820 map when a user-defined > E820 map is specified. While the behaviour of i386 (32 bit) was to limit > the E820 map (and /proc/iomem), the behaviour of x86-64 (64 bit) was not to > limit. > > That patch limits the E820 map again for both x86 architectures. > > Code was tested for compilation and booting on a 32 bit and 64 bit system. > > > Signed-off-by: Bernhard Walle > --- > arch/x86/kernel/e820.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c > index 7d1109b..19b7f05 100644 > --- a/arch/x86/kernel/e820.c > +++ b/arch/x86/kernel/e820.c > @@ -979,6 +979,8 @@ static int __init parse_memopt(char *p) > > mem_size = memparse(p, &p); > end_user_pfn = mem_size>>PAGE_SHIFT; > + e820_update_range(mem_size, ULLONG_MAX, E820_RAM, E820_RESERVED); ==> + e820_update_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, E820_RESERVED); > + > return 0; > } > early_param("mem", parse_memopt); > @@ -1023,6 +1025,7 @@ static int __init parse_memmap_opt(char *p) > e820_add_region(start_at, mem_size, E820_RESERVED); > } else { > end_user_pfn = (mem_size >> PAGE_SHIFT); > + e820_update_range(mem_size, ULLONG_MAX, E820_RAM, E820_RESERVED); ==> + e820_update_range(mem_size, ULLONG_MAX - mem_size, E820_RAM, E820_RESERVED); YH -- 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/