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Re: [Xen-devel] [PATCH] Page scrubbing

To: Christoph Egger <Christoph.Egger@xxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] Page scrubbing
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 11 Sep 2007 16:20:20 +0100
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Thread-topic: [Xen-devel] [PATCH] Page scrubbing
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The printk() is printing nonsense for x86/32, as most pages do not have a
permanent mapping in Xen, and hence no valid virtual address. Page_to_virt()
on such pages is not allowed.

 -- Keir

On 11/9/07 16:07, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote:

> Hi!
> Make scrub_heap_pages() print from where to where
> it scrubs pages.
> Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>
> This patch uncovers a strange behaviour on 32bit.
> On 64bit I get this:
> (XEN) Scrubbing Free RAM 0xffff830000100000 -> 0xffff83003fff0000: ....done.
> On 32bit I get this:
> (XEN) Scrubbing Free RAM 0xffc00000 ->
> 0xdefb0000: .............................done.
> On 64bit the scrubber goes up, but on 32bit it goes down.
> Is this behaviour expected?

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