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Date: Fri, 30 Jul 2010 14:11:43 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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Subject: Re: In place kexec
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To: David Woodhouse <dwmw2@infradead.org>
Cc: Randy Dunlap <randy.dunlap@oracle.com>, Neil Horman <nhorman@redhat.com>, "kexec@lists.infradead.org" <kexec@lists.infradead.org>, Simon Horman <horms@verge.net.au>, "Eric W. Biederman" <ebiederm@xmission.com>, linux-driver@qlogic.com, Vivek Goyal <vgoyal@redhat.com>, Andrew Vasquez <andrew.vasquez@qlogic.com>

On 07/30/2010 01:15 PM, David Woodhouse wrote:
> 
>  - 'on with page tables cleared', in which case you are safe but some
>     devices might get upset when their DMA is aborted, so their driver
>     needs not to be a pile of shit, and needs to recover from that.
> 

I presume this is the state he's referring to.

Now, if this means there are page tables in memory those tables are
still subject to being overwritten.

	-hpa

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