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[Xen-devel] Re: [PATCH] xen: actually release memory when shrinking doma

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: [Xen-devel] Re: [PATCH] xen: actually release memory when shrinking domain
From: Ingo Molnar <mingo@xxxxxxx>
Date: Thu, 22 Jan 2009 23:42:05 +0100
Cc: "dan.magenheimer@xxxxxxxxxx" <dan.magenheimer@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Stable Kernel <stable@xxxxxxxxxx>
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* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

> From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
>
> Fix this:
>
>> It appears that in the upstream balloon driver,
>> > the call to HYPERVISOR_update_va_mapping is missing
>> > from decrease_reservation.  I think as a result,
>> > the balloon driver is eating memory but not
>> > releasing it to Xen, thus rendering the balloon
>> > driver essentially useless.  (Can be observed via xentop.)
>
> Signed-off-by: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
> ---
> drivers/xen/balloon.c |    5 +++++
> 1 file changed, 5 insertions(+)

applied to tip/x86/urgent, thanks!

        Ingo

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