Date: Tue, 5 May 2015 17:23:43 +0200
From: Joerg Roedel <joro@8bytes.org>
To: Dave Young <dyoung@redhat.com>
Cc: "Li, Zhen-Hua" <zhen-hual@hp.com>, dwmw2@infradead.org,
        indou.takao@jp.fujitsu.com, bhe@redhat.com, vgoyal@redhat.com,
        iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
        linux-pci@vger.kernel.org, kexec@lists.infradead.org,
        alex.williamson@redhat.com, ddutile@redhat.com,
        ishii.hironobu@jp.fujitsu.com, bhelgaas@google.com, doug.hatch@hp.com,
        jerry.hoemann@hp.com, tom.vaden@hp.com, li.zhang6@hp.com,
        lisa.mitchell@hp.com, billsumnerlinux@gmail.com, rwright@hp.com
Subject: Re: [PATCH v9 0/10] iommu/vt-d: Fix intel vt-d faults in kdump kernel
Message-ID: <20150505152343.GP15736@8bytes.org>
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 <20150403084031.GF22579@dhcp-128-53.nay.redhat.com>
 <20150504110551.GD15736@8bytes.org>
 <20150505060931.GB31063@dhcp-128-4.nay.redhat.com>
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On Tue, May 05, 2015 at 02:09:31PM +0800, Dave Young wrote:
> I agree that we can do nothing with the old corrupted data, but I worry
> about the future corruption after using the old corrupted data. I wonder
> if we can mark all the oldmem as readonly so that we can lower the risk.
> Is it resonable?

Do you mean marking it read-only for the devices? That will very likely
cause DMAR faults, re-introducing the problem this patch-set tries to
fix.


	Joerg

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