linux-kernel - Re: [PATCH] VMware Balloon driver

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Message-Id: <1270596059.32096.11895.camel@nimitz>
Date:	Tue, 06 Apr 2010 16:20:59 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Dmitry Torokhov <dtor@...are.com>,
	linux-kernel@...r.kernel.org, pv-drivers@...are.com,
	Avi Kivity <avi@...hat.com>,
	Dan Magenheimer <dan.magenheimer@...cle.com>
Subject: Re: [PATCH] VMware Balloon driver

On Mon, 2010-04-05 at 16:28 -0700, Jeremy Fitzhardinge wrote:
> I guess a way to use it in the short term is to have a loop of the form:
> 
>         while (guest_size>  target) {
>                 shrink_all_memory(guest_size - target);         /* force pages to be free */
>                 while (p = alloc_page(GFP_NORETRY))             /* vacuum up pages */
>                         release_page_to_hypervisor(p);
>                 /* twiddle thumbs */
>         }

We also need to remember to consolidate the Xen and virtio-balloon
drivers.  They both have their own GFP flags, for instance, but I think
they actually want the exact same thing.  They could probably also share
that snippet, right?

-- Dave

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