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Re: [Xen-devel] [PATCH R3 0/7] xen/balloon: Memory hotplug support for X

To: "v.tolstov@xxxxxxxxx" <v.tolstov@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH R3 0/7] xen/balloon: Memory hotplug support for Xen balloon driver
From: Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Date: Fri, 4 Feb 2011 09:11:22 +0000
Cc: "jeremy@xxxxxxxx" <jeremy@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "haicheng.li@xxxxxxxxxxxxxxx" <haicheng.li@xxxxxxxxxxxxxxx>, "konrad.wilk@xxxxxxxxxx" <konrad.wilk@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, "dave@xxxxxxxxxxxxxxxxxx" <dave@xxxxxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, "wdauchy@xxxxxxxxx" <wdauchy@xxxxxxxxx>, "rientjes@xxxxxxxxxx" <rientjes@xxxxxxxxxx>, "andi.kleen@xxxxxxxxx" <andi.kleen@xxxxxxxxx>, "akpm@xxxxxxxxxxxxxxxxxxxx" <akpm@xxxxxxxxxxxxxxxxxxxx>, "fengguang.wu@xxxxxxxxx" <fengguang.wu@xxxxxxxxx>, Daniel Kiper <dkiper@xxxxxxxxxxxx>
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On Thu, 2011-02-03 at 21:20 +0000, Vasiliy G Tolstov wrote:
> I have some may be offtopic question: Is that possible to export balloon
> function balloon_set_new_target to GPL modules (EXPORT_SYMBOL_GPL) ? 
> This helps to kernel modules (not in kernel tree) to contol balloonin
> (for example autoballoon or something else) without needing to write so
> sysfs. (Writing files from kernel module is bad, this says Linux Kernel
> Faq).

Is there a reason to do it from kernel space in the first place? auto
ballooning can be done by a userspace daemon, can't it?

Ian.


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