Re: [PATCH] disable CPU side GART accesses
From: Yinghai Lu
Date: Thu Oct 16 2008 - 13:44:38 EST
On Thu, Oct 16, 2008 at 10:00 AM, Bob Montgomery <bob.montgomery@xxxxxx> wrote:
> The problem occurs when the copy operation reads from the GART aperture
> (iommu window) and wakes up the GART translation hardware. This patch
> stops that by telling the GART to ignore addresses that come from the
> CPU and to only translate addresses from the IO side.
why kdump need to copy those area? those area is supposed to be
reserved in e820 table by BIOS or first kernel.
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