[PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"

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Subject: [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"
From: ebiederm@xxxxxxxxxxxx (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")
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>

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

References:
- [PATCH 0/4] AMD IOMMU kdump fix plus cleanups (v2)
  - From: Chris Wright
- [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"
  - From: Chris Wright
- [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"
  - From: Joerg Roedel
- [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"
  - From: Eric W. Biederman
- [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"
  - From: Joerg Roedel
- [PATCH 3/4] Revert "x86: disable IOMMUs on kernel crash"
  - From: Eric W. Biederman

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