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Date: Wed, 23 Jan 2008 06:34:47 -0600
From: Robin Holt <holt@sgi.com>
To: Andrea Arcangeli <andrea@qumranet.com>
Cc: Robin Holt <holt@sgi.com>, Avi Kivity <avi@qumranet.com>,
       Christoph Lameter <clameter@sgi.com>, Izik Eidus <izike@qumranet.com>,
       Andrew Morton <akpm@osdl.org>, Nick Piggin <npiggin@suse.de>,
       kvm-devel@lists.sourceforge.net,
       Benjamin Herrenschmidt <benh@kernel.crashing.org>, steiner@sgi.com,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org,
       daniel.blueman@quadrics.com, Hugh Dickins <hugh@veritas.com>
Subject: Re: [kvm-devel] [PATCH] export notifier #1
Message-ID: <20080123123447.GI26420@sgi.com>
References: <20080121125204.GJ6970@v2.random> <4795F9D2.1050503@qumranet.com> <20080122144332.GE7331@v2.random> <20080122200858.GB15848@v2.random> <Pine.LNX.4.64.0801221232040.28197@schroedinger.engr.sgi.com> <20080122223139.GD15848@v2.random> <Pine.LNX.4.64.0801221433080.2271@schroedinger.engr.sgi.com> <479716AD.5070708@qumranet.com> <20080123105246.GG26420@sgi.com> <20080123120446.GF15848@v2.random>
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> Why don't you stick to mm+va and use get_user_pages and let the VM do
> the swapins etc...?

Our concern is also with memory protections for the physical page.
Additionally, we need to support exporting of memory in a VM_PFNMAP
address ranges (specifically, memory mapped using sgi_fetchop, uncached
or cached mspec devices).

Thanks,
Robin