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From: Ross McIlroy <ross.mcilroy@gmail.com>
To: Mark Williamson <mark.williamson@cl.cam.ac.uk>
Cc: cwc22@cam.ac.uk, xen-devel@lists.xensource.com,
	Ross C Mcilroy <mcilrorc@dcs.gla.ac.uk>
Subject: Re: allocate_empty_lowmem_region hypervisor function
Date: Tue, 2 Aug 2005 14:20:59 +0100	[thread overview]
Message-ID: <7f4e21e305080206205dd0b3b5@mail.gmail.com> (raw)
In-Reply-To: <200508021348.07818.mark.williamson@cl.cam.ac.uk>

> It's only used in the backend drivers, so I guess the build is trying to omit
> that as dead code as far as a domU is concerned.  

Could it be added to DomU, otherwise there is no way to map foreign
pages using the grant tables in unprivileged domains.  I thought the
point of grant tables was to allow inter domain communication between
non-privileged domains?  I could easily supply a patch if people think
this should be possible.

> IIRC the function is pure Linux-isms with no Xen-specifics, so it should be fine to
> build into a domU (or even x86 Linux).

It uses the balloon driver and hypervisor calls, so I don't think it
would work in x86 Linux, but it works fine in DomU.

Thanks,

Ross

  reply	other threads:[~2005-08-02 13:20 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <260002866C8EBA4EA0AD853F467EC11E04ACDB@EX2.ad.dcs.gla.ac.uk>
2005-08-02 12:48 ` allocate_empty_lowmem_region hypervisor function Mark Williamson
2005-08-02 13:20   ` Ross McIlroy [this message]
2005-08-02 13:30     ` Mark Williamson
2005-08-02 15:11       ` [Patch] allocate_empty_lowmem_region in non-privileged domains Ross McIlroy
2005-08-02 15:58         ` Mark Williamson

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