linux-kernel - Re: [PATCH] xen: actually release memory when shrinking domain

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Message-ID: <20090122224205.GA17450@elte.hu>
Date:	Thu, 22 Jan 2009 23:42:05 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	"dan.magenheimer@...cle.com" <dan.magenheimer@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Stable Kernel <stable@...nel.org>
Subject: Re: [PATCH] xen: actually release memory when shrinking domain


* Jeremy Fitzhardinge <jeremy@...p.org> wrote:

> From: Dan Magenheimer <dan.magenheimer@...cle.com>
>
> 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@...cle.com>
> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
> ---
> drivers/xen/balloon.c |    5 +++++
> 1 file changed, 5 insertions(+)

applied to tip/x86/urgent, thanks!

	Ingo
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