From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TE9Ys-0007g6-75 for kexec@lists.infradead.org; Wed, 19 Sep 2012 01:58:47 +0000 Received: from m2.gw.fujitsu.co.jp (unknown [10.0.50.72]) by fgwmail6.fujitsu.co.jp (Postfix) with ESMTP id 143463EE0AE for ; Wed, 19 Sep 2012 10:58:40 +0900 (JST) Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id F2DBB45DE4E for ; Wed, 19 Sep 2012 10:58:39 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (s2.gw.fujitsu.co.jp [10.0.50.92]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id DC59245DE4D for ; Wed, 19 Sep 2012 10:58:39 +0900 (JST) Received: from s2.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id CED5E1DB802C for ; Wed, 19 Sep 2012 10:58:39 +0900 (JST) Received: from m1001.s.css.fujitsu.com (m1001.s.css.fujitsu.com [10.240.81.139]) by s2.gw.fujitsu.co.jp (Postfix) with ESMTP id 885E51DB8038 for ; Wed, 19 Sep 2012 10:58:39 +0900 (JST) Message-ID: <5059256B.2010708@jp.fujitsu.com> Date: Wed, 19 Sep 2012 10:52:43 +0900 From: Takao Indoh MIME-Version: 1.0 Subject: Re: [RFC][PATCH] Reset PCIe devices to address DMA problem on kdump with iommu References: <501BB4EF.7080909@jp.fujitsu.com> <20120803114643.GA28330@redhat.com> <501F4877.5050605@jp.fujitsu.com> <20120806203902.GH25559@redhat.com> <50473306.1070803@jp.fujitsu.com> <20120910143604.GB639@redhat.com> <504F1343.7030607@jp.fujitsu.com> <20120914200334.GA9041@phenom.dumpdata.com> In-Reply-To: <20120914200334.GA9041@phenom.dumpdata.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: konrad@kernel.org Cc: martin.wilck@ts.fujitsu.com, linux-pci@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, hbabu@us.ibm.com, ishii.hironobu@jp.fujitsu.com, bhelgaas@google.com, vgoyal@redhat.com (2012/09/15 5:03), Konrad Rzeszutek Wilk wrote: >> As to the boot parameter to enable this function, you suggested using >> reset_devices. I found that on a certain platform resetting devices >> caused PCIe error due to a hardware bug. Therefore I think we need >> new parameter apart from reset_devices to disable this function on >> such a machine. > > Wouldn't a DMI quirk be better for this? That way the second kernel > internally would know not to do this. That sounds good. I'll try it, thanks. Thanks, Takao Indoh _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec