Date: Thu, 24 Jan 2008 12:07:52 -0800 (PST)
From: Christoph Lameter <clameter@sgi.com>
To: Andrea Arcangeli <andrea@qumranet.com>
cc: Robin Holt <holt@sgi.com>, Avi Kivity <avi@qumranet.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
In-Reply-To: <20080124154239.GP7141@v2.random>
Message-ID: <Pine.LNX.4.64.0801241205510.22285@schroedinger.engr.sgi.com>
References: <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>
 <20080123114136.GE15848@v2.random> <20080123123230.GH26420@sgi.com>
 <20080123173325.GG7141@v2.random> <Pine.LNX.4.64.0801231220590.13547@schroedinger.engr.sgi.com>
 <20080124154239.GP7141@v2.random>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 691
Lines: 17

On Thu, 24 Jan 2008, Andrea Arcangeli wrote:

> I think you should consider if you can also build a rmap per-MM like
> KVM does and index it by the virtual address like KVM does.

Yes we have that.

If we have that then we do not need the mmu_notifier. 
We could call it with a page parameter and then walk the KVM or XPmem 
reverse map to directly find all the ptes we need to clear. There is no 
need then to add a new field to the mm_struct.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/