From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from kirsty.vergenet.net ([2406:a000:f000:9500::1]) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1RHQ4c-0006t6-LY for kexec@lists.infradead.org; Sat, 22 Oct 2011 01:08:31 +0000 Date: Sat, 22 Oct 2011 10:08:21 +0900 From: Simon Horman Subject: Re: [PATCH] intel-iommu:make identity_map default for crash dump Message-ID: <20111022010821.GF21850@verge.net.au> References: <20111021123154.GA5821@darkstar.nay.redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20111021123154.GA5821@darkstar.nay.redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: Dave Young Cc: iommu@lists.linux-foundation.org, luyu@redhat.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, vgoyal@redhat.com On Fri, Oct 21, 2011 at 08:31:54PM +0800, Dave Young wrote: > kdump kernel sometimes will get DMAR faults which > is caused by random in-flight dma from 1st kernel > > Here make the identity_mapping as default for this case This seems reasonable to me. Although I am curious to know what the side effects of using IDENTMAP_ALL might be. _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751939Ab1JVBI0 (ORCPT ); Fri, 21 Oct 2011 21:08:26 -0400 Received: from kirsty.vergenet.net ([202.4.237.240]:38262 "EHLO kirsty.vergenet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751440Ab1JVBIZ (ORCPT ); Fri, 21 Oct 2011 21:08:25 -0400 Date: Sat, 22 Oct 2011 10:08:21 +0900 From: Simon Horman To: Dave Young Cc: kexec@lists.infradead.org, iommu@lists.linux-foundation.org, vgoyal@redhat.com, linux-kernel@vger.kernel.org, luyu@redhat.com Subject: Re: [PATCH] intel-iommu:make identity_map default for crash dump Message-ID: <20111022010821.GF21850@verge.net.au> References: <20111021123154.GA5821@darkstar.nay.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20111021123154.GA5821@darkstar.nay.redhat.com> Organisation: Horms Solutions Ltd. User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 21, 2011 at 08:31:54PM +0800, Dave Young wrote: > kdump kernel sometimes will get DMAR faults which > is caused by random in-flight dma from 1st kernel > > Here make the identity_mapping as default for this case This seems reasonable to me. Although I am curious to know what the side effects of using IDENTMAP_ALL might be.