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Re: [Xen-devel] xen crash during Dom0 boot

To: Christoph Egger <Christoph.Egger@xxxxxxx>
Subject: Re: [Xen-devel] xen crash during Dom0 boot
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Thu, 14 Apr 2011 09:33:26 -0400
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Tim Deegan <Tim.Deegan@xxxxxxxxxx>
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> The reason is that guest_walk_tables() in xen/arch/x86/mm/guest_walk.c  fakes 
> l1e entries for 2mb pages but not for 1gb pages.
> A workaround is to assign the Dom0 not more than 2 GB RAM  via
> the dom0_mem  xen boot parameter.

But if you use 4KB pages then the workaround is not neccessary, right?
> This can only be reproduced with Dom0 kernels which use the autotranslation 
> feature (Linux Dom0 does, NetBSD Dom0 doesn't, don't know about other Dom0).

Autotranslation feature.. you mean that pagetables are not updated via
the Linux kernel, but instead by the Xen hypervisor?

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