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Re: [Xen-devel] conditional clearing of dom0_l2 in i386's zap_low_mappings() ?


  • To: Jan Beulich <JBeulich@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <keir@xxxxxxx>
  • Date: Thu, 28 Oct 2010 16:30:34 +0100
  • Cc:
  • Delivery-date: Thu, 28 Oct 2010 08:31:41 -0700
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  • Thread-topic: [Xen-devel] conditional clearing of dom0_l2 in i386's zap_low_mappings() ?

On 28/10/2010 15:50, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

> What is the reason for not unconditionally clearing the whole L2
> directory here? There shouldn't be anything in the first Gb that
> wasn't placed there just temporarily by Xen...

You mean the conditional within the for loop that clears dom0 l2 entries? If
we zapped all of dom0's l2 entries, we'd also be zapping the entries
legitimately just created by the dom0 builder!

 -- Keir

> Thanks, Jan
> 
> 
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