To: Joerg Roedel <joro@8bytes.org>
Cc: Chris Wright <chrisw@sous-sol.org>, Joerg Roedel <joerg.roedel@amd.com>,
       nhorman@redhat.com, nhorman@tuxdriver.com, kexec@lists.infradead.org,
       linux-kernel@vger.kernel.org, hbabu@us.ibm.com,
       iommu@lists.linux-foundation.org, vgoyal@redhat.com
Subject: Re: [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"
References: <20100403012751.834020949@sous-sol.org>
	<20100403012820.229410717@sous-sol.org>
	<20100403172224.GO24846@8bytes.org> <m18w94l9c9.fsf@fess.ebiederm.org>
	<20100404084435.GT24846@8bytes.org> <m1fx3befxr.fsf@fess.ebiederm.org>
From: ebiederm@xmission.com (Eric W. Biederman)
Date: Sun, 04 Apr 2010 02:19:33 -0700
In-Reply-To: <m1fx3befxr.fsf@fess.ebiederm.org> (Eric W. Biederman's message of "Sun\, 04 Apr 2010 02\:16\:00 -0700")
Message-ID: <m1aatjefru.fsf@fess.ebiederm.org>
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I guess I should add the place where I have serious test results for with
a gart is on 2.6.29.  Where there isn't that iommu shutdown and I don't have
problems with it.

So my experience is that touching the gart in machine_crash_shutdown is
unnecessary.

Eric
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