From: Andi Kleen <ak@suse.de>
To: Jim Paradis <jparadis@redhat.com>
Cc: marcelo.tosatti@cyclades.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Fix fencepost error in x86_64 IOMMU (2.4)
Date: Wed, 18 Feb 2004 22:34:15 +0100 [thread overview]
Message-ID: <20040218223415.4db195e6.ak@suse.de> (raw)
In-Reply-To: <40328446.5030805@redhat.com>
On Tue, 17 Feb 2004 16:14:46 -0500
Jim Paradis <jparadis@redhat.com> wrote:
> There's a fencepost error in the GART IOMMU handling on x86_64
> in the unmap path. When testing to see if the bus address is
> within the IOMMU window and needs to be unmapped, the start of
> the first page *beyond* the window also passes the test. This
> can cause the first doubleword of the next page beyond the gatt
> table to be smashed to zero, with unpredictable results depending
> on what that page is used for.
>
> Patch attached for 2.4. The same problem also exists in 2.6,
> for which I'll send a separate patch.
Thanks. I will add it to my tree.
-Andi
prev parent reply other threads:[~2004-02-17 21:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-17 21:14 [PATCH] Fix fencepost error in x86_64 IOMMU (2.4) Jim Paradis
2004-02-18 21:34 ` Andi Kleen [this message]
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