From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yinghai Subject: Re: [PATCH] Prevent reserving RAM in the region already reserved by BIOS Date: Wed, 19 May 2010 10:40:38 -0700 Message-ID: <4BF42296.1030905@oracle.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from rcsinet10.oracle.com ([148.87.113.121]:28142 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751453Ab0ESRm0 (ORCPT ); Wed, 19 May 2010 13:42:26 -0400 In-Reply-To: Sender: linux-arch-owner@vger.kernel.org List-ID: To: Mathieu Rondonneau Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, "H. Peter Anvin" , Ingo Molnar , Linus Torvalds On 05/18/2010 10:35 PM, Mathieu Rondonneau wrote: > Does it make sense to prevent looking for stolen RAM below the ISA section. > > > Signed-off-by: Mathieu Rondonneau > --- > arch/x86/kernel/e820.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c > index 7bca3c6..322c9c3 100644 > --- a/arch/x86/kernel/e820.c > +++ b/arch/x86/kernel/e820.c > @@ -1156,6 +1156,8 @@ void __init e820_reserve_resources_late(void) > end = MAX_RESOURCE_SIZE; > if (start >= end) > continue; > + if (end < ISA_START_ADDRESS) > + continue; > printk(KERN_DEBUG "reserve RAM buffer: %016llx - %016llx ", > start, end); > reserve_region_with_split(&iomem_resource, start, end, do you notice any changes in /proc/iomem? YH