linux-kernel - RE: [PATCH 1/1] mm: Export a function to get vm committed memory

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Date:	Tue, 13 Nov 2012 07:45:39 -0800 (PST)
From:	Dan Magenheimer <dan.magenheimer@...cle.com>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>, gregkh@...uxfoundation.org,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	olaf@...fle.de, apw@...onical.com, andi@...stfloor.org,
	akpm@...ux-foundation.org, linux-mm@...ck.org,
	kamezawa.hiroyuki@...il.com, mhocko@...e.cz, hannes@...xchg.org,
	yinghan@...gle.com, dan.magenheimer@...cle.com,
	konrad.wilk@...cle.com
Subject: RE: [PATCH 1/1] mm: Export a function to get vm committed memory

> From: K. Y. Srinivasan [mailto:kys@...rosoft.com]
> Sent: Tuesday, November 13, 2012 8:03 AM
> To: gregkh@...uxfoundation.org; linux-kernel@...r.kernel.org; devel@...uxdriverproject.org;
> olaf@...fle.de; apw@...onical.com; andi@...stfloor.org; akpm@...ux-foundation.org; linux-mm@...ck.org;
> kamezawa.hiroyuki@...il.com; mhocko@...e.cz; hannes@...xchg.org; yinghan@...gle.com;
> dan.magenheimer@...cle.com; konrad.wilk@...cle.com
> Cc: K. Y. Srinivasan
> Subject: [PATCH 1/1] mm: Export a function to get vm committed memory
> 
> It will be useful to be able to access global memory commitment from device
> drivers. On the Hyper-V platform, the host has a policy engine to balance
> the available physical memory amongst all competing virtual machines
> hosted on a given node. This policy engine is driven by a number of metrics
> including the memory commitment reported by the guests. The balloon driver
> for Linux on Hyper-V will use this function to retrieve guest memory commitment.
> This function is also used in Xen self ballooning code.
> 
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>

The patch to the Xen selfballoon driver is unnecessary, but is
one step in the direction of module support for this driver so
I am fine whether the patch is included here or not.

Acked-by: Dan Magenheimer <dan.magenheimer@...cle.com>
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