* Re: [PATCH] xen: correct bug in p2m list initialization
[not found] <1425048329-6797-1-git-send-email-jgross@suse.com>
@ 2015-02-27 14:54 ` David Vrabel
0 siblings, 0 replies; only message in thread
From: David Vrabel @ 2015-02-27 14:54 UTC (permalink / raw)
To: Juergen Gross, linux-kernel, xen-devel, konrad.wilk,
boris.ostrovsky, stefan.bader
On 27/02/15 14:45, Juergen Gross wrote:
> Commit 054954eb051f35e74b75a566a96fe756015352c8 ("xen: switch to
> linear virtual mapped sparse p2m list") introduced an error.
>
> During initialization of the p2m list a p2m identity area mapped by
> a complete identity pmd entry has to be split up into smaller chunks
> sometimes, if a non-identity pfn is introduced in this area.
>
> If this non-identity pfn is not at index 0 of a p2m page the new
> p2m page needed is initialized with wrong identity entries, as the
> identity pfns don't start with the value corresponding to index 0,
> but with the initial non-identity pfn. This results in weird wrong
> mappings.
>
> Correct the wrong initialization by starting with the correct pfn.
Applied to stable/for-linus-4.0, thanks.
David
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[not found] <1425048329-6797-1-git-send-email-jgross@suse.com>
2015-02-27 14:54 ` [PATCH] xen: correct bug in p2m list initialization David Vrabel
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