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Date:	Wed, 27 Feb 2008 17:03:21 -0800 (PST)
From:	Christoph Lameter <>
To:	Andrea Arcangeli <>
cc:	Nick Piggin <>,,
	Robin Holt <>, Avi Kivity <>,
	Izik Eidus <>,,
	Peter Zijlstra <>,,
	Steve Wise <>,
	Roland Dreier <>,
	Kanoj Sarcar <>,,,,
Subject: Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges

On Thu, 28 Feb 2008, Andrea Arcangeli wrote:

> On Wed, Feb 27, 2008 at 04:14:08PM -0800, Christoph Lameter wrote:
> > Erm. This would also be needed by RDMA etc.
> The only RDMA I know is Quadrics, and Quadrics apparently doesn't need
> to schedule inside the invalidate methods AFIK, so I doubt the above
> is true. It'd be interesting to know if IB is like Quadrics and it
> also doesn't require blocking to invalidate certain remote mappings.

RDMA works across a network and I would assume that it needs confirmation 
that a connection has been torn down before pages can be unmapped.
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