[ofa-general] Re: [patch 2/6] mmu_notifier: Callbacks to invalidate address ranges

[Christoph Lameter]

On Thu, 28 Feb 2008, Andrea Arcangeli wrote:

> On Wed, Feb 27, 2008 at 05:03:21PM -0800, Christoph Lameter wrote:
> > 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.
> 
> Depends on the latency of the network, for example with page pinning
> it can even try to reduce the wait time, by tearing down the mapping
> in range_begin and spin waiting the ack only later in range_end.

What about invalidate_page()?