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[Xen-devel] Re: [PATCH] xen: handle highmem pages correctly when shrinki

from [Ingo Molnar]

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To:	Ian Campbell <ian.campbell@xxxxxxxxxx>
Subject:	[Xen-devel] Re: [PATCH] xen: handle highmem pages correctly when shrinking a domain
From:	Ingo Molnar <mingo@xxxxxxx>
Date:	Fri, 23 Jan 2009 18:56:14 +0100
Cc:	Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, "dan.magenheimer@xxxxxxxxxx" <dan.magenheimer@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Stable Kernel <stable@xxxxxxxxxx>
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* Ian Campbell <ian.campbell@xxxxxxxxxx> wrote:

> This commit causes a crash if the page being released is a highmem
> page.
> 
>   commit 1058a75f07b9bb8323fb5197be5526220f8b75cf
>   Author: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
>   Date:   Thu Jan 22 14:36:08 2009 -0800
> 
>     xen: actually release memory when shrinking domain
> 
> If a page is highmem then there is no need to unmap it.
> 
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxx>
> Cc: dan.magenheimer@xxxxxxxxxx <dan.magenheimer@xxxxxxxxxx>
> Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
> Cc: Stable Kernel <stable@xxxxxxxxxx>
> ---
>  drivers/xen/balloon.c |   11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)

Applied to tip/x86/urgent, thanks Ian!

        Ingo

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