From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from g2t2353.austin.hp.com ([15.217.128.52]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YiGBV-0003kd-45 for kexec@lists.infradead.org; Wed, 15 Apr 2015 05:48:25 +0000 Message-ID: <552DFB56.1070600@hp.com> Date: Wed, 15 Apr 2015 13:47:02 +0800 From: "Li, ZhenHua" MIME-Version: 1.0 Subject: Re: [PATCH v10 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel References: <1428655333-19504-1-git-send-email-zhen-hual@hp.com> <20150415005731.GC19051@localhost.localdomain> In-Reply-To: <20150415005731.GC19051@localhost.localdomain> 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" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Dave Young Cc: alex.williamson@redhat.com, indou.takao@jp.fujitsu.com, bhe@redhat.com, tom.vaden@hp.com, rwright@hp.com, linux-pci@vger.kernel.org, joro@8bytes.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, lisa.mitchell@hp.com, jerry.hoemann@hp.com, iommu@lists.linux-foundation.org, ddutile@redhat.com, doug.hatch@hp.com, ishii.hironobu@jp.fujitsu.com, bhelgaas@google.com, billsumnerlinux@gmail.com, li.zhang6@hp.com, dwmw2@infradead.org, vgoyal@redhat.com On 04/15/2015 08:57 AM, Dave Young wrote: > Again, I think it is bad to use old page table, below issues need consider: > 1) make sure old page table are reliable across crash > 2) do not allow writing oldmem after crash > > Please correct me if I'm wrong, or if above is not doable I think I will vote for > resetting pci bus. > > Thanks > Dave > Hi Dave, When updating the context tables, we have to write their address to root tables, this will cause writing to old mem. Resetting the pci bus has been discussed, please check this: http://lists.infradead.org/pipermail/kexec/2014-October/012752.html https://lkml.org/lkml/2014/10/21/890 Thanks Zhenhua _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec