linux-kernel - Re: [discuss] A question about GART aperture unmap

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Message-ID: <ac8af0be0705100314p43a11d3cw10ce8e5726f9672c@mail.gmail.com>
Date:	Thu, 10 May 2007 18:14:45 +0800
From:	"Zhao Forrest" <forrest.zhao@...il.com>
To:	"Andi Kleen" <andi@...stfloor.org>
Cc:	discuss@...-64.org, linux-kernel@...r.kernel.org
Subject: Re: [discuss] A question about GART aperture unmap

On 5/10/07, Andi Kleen <andi@...stfloor.org> wrote:
> > After commenting out clear_kernel_mapping() line, the system would
> > have sync flood and reset from time to time. However when with this
> > clear_kernel_mapping() line, no system reset happened.
>
> Hmm, that should not happen. Normally the problems fixed by
> this are expected to be very rare and you also should not get
> sync flood, but just cache line corruption. While it might be possible
> for random corruption to then cause sync flood that should be again
> rather unlikely. If it's repeatable quickly something else
> must be wrong.

Sorry, I missed the last sentence. This bug is reproduced by copying a
large file(8G) and in the meanwhile compiling a linux kernel for about
1 to 2 days.

Forrest
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