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Date: Wed, 23 Jan 2008 16:17:28 +0200
From: Avi Kivity <avi@qumranet.com>
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To: Robin Holt <holt@sgi.com>
CC: Gerd Hoffmann <kraxel@redhat.com>, Christoph Lameter <clameter@sgi.com>,
       Andrea Arcangeli <andrea@qumranet.com>, Andrew Morton <akpm@osdl.org>,
       Nick Piggin <npiggin@suse.de>, linux-mm@kvack.org,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>, steiner@sgi.com,
       linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net,
       daniel.blueman@quadrics.com, Hugh Dickins <hugh@veritas.com>
Subject: Re: [kvm-devel] [PATCH] export notifier #1
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Robin Holt wrote:
> On Wed, Jan 23, 2008 at 01:51:23PM +0100, Gerd Hoffmann wrote:
>   
>> Jumping in here, looks like this could develop into a direction useful
>> for Xen.
>>
>> Background:  Xen has a mechanism called "grant tables" for page sharing.
>>  Guest #1 can issue a "grant" for another guest #2, which in turn then
>> can use that grant to map the page owned by guest #1 into its address
>> space.  This is used by the virtual network/disk drivers, i.e. typically
>> Domain-0 (which has access to the real hardware) maps pages of other
>> guests to fill in disk/network data.
>>     
>
> This is extremely similar to what XPMEM is providing.
>
>   

I think that in Xen's case the page tables are the normal cpu page 
tables, not an external mmu (like RDMA, kvm, and XPMEM).

-- 
error compiling committee.c: too many arguments to function