Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759300AbYFYQBR (ORCPT ); Wed, 25 Jun 2008 12:01:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752034AbYFYQBH (ORCPT ); Wed, 25 Jun 2008 12:01:07 -0400 Received: from rv-out-0506.google.com ([209.85.198.239]:22659 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752726AbYFYQBG (ORCPT ); Wed, 25 Jun 2008 12:01:06 -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=C8RdG4OJhYA3/JDWs9AKJpTaeyHC101f+4BNqdfc+B8kSKEYLcAkzUHcfAkCeX2Vuv 0cok7tDvuG1LdXqiXr9KsQXzxfuiooLOz00WMRVGNrV5D8YA2caUzqOIO98GPi0Py6Ee jYCX3gttnqMMr7Hd2NlkWABvuBlKC05U6XpKQ= Message-ID: <86802c440806250901n68278ab1ma1add38c165122af@mail.gmail.com> Date: Wed, 25 Jun 2008 09:01:05 -0700 From: "Yinghai Lu" To: "Bernhard Walle" Subject: Re: [PATCH 3/3] Limit E820 map when a user-defined memory map is specified Cc: x86@kernel.org, linux-kernel@vger.kernel.org, vgoyal@redhat.com, kexec@lists.infradead.org In-Reply-To: <1214395342-20375-4-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: <1214395342-20375-1-git-send-email-bwalle@suse.de> <1214395342-20375-4-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: 1740 Lines: 48 On Wed, Jun 25, 2008 at 5:02 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); > + > 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); > } > return *p == '\0' ? 0 : -EINVAL; > } > -- only this one is needed now. but please change ULLONG_MAX to ULLONG_MAX - mem_size 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/