Date: Fri, 22 Jun 2007 12:31:24 -0700
From: Muli Ben-Yehuda <muli@il.ibm.com>
To: Yinghai Lu <Yinghai.Lu@Sun.COM>
Cc: Andi Kleen <ak@suse.de>, Andrew Morton <akpm@linux-foundation.org>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Vivek Goyal <vgoyal@in.ibm.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] x86-64: disable the GART before allocate aperture
Message-ID: <20070622193124.GG5051@rhun.smartcity.com>
References: <200706221219.16243.yinghai.lu@sun.com>
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On Fri, Jun 22, 2007 at 12:19:15PM -0700, Yinghai Lu wrote:
> [PATCH] x86-64: disable the GART before allocate aperture
> 
> For K8 system: 4G RAM with memory hole remapping enabled, or more
> than 4G RAM installed. when mem is allocated for GART, it will do
> the memset for clear.  and for kexec case, the first kernel already
> enable that, the memset in second kernel will cause the system
> restart. So disable that at first before we try to allocate mem for
> it.

Why does the memset in the second kernel cause a system restart?

Cheers,
Muli
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