linux-kernel - Re: [ofa-general] Re: Demand paging for memory regions

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Date:	Wed, 13 Feb 2008 11:02:15 -0800 (PST)
From:	Christoph Lameter <clameter@....com>
To:	Christoph Raisch <RAISCH@...ibm.com>
cc:	Roland Dreier <rdreier@...co.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <andrea@...ranet.com>, avi@...ranet.com,
	a.p.zijlstra@...llo.nl, daniel.blueman@...drics.com,
	general@...ts.openfabrics.org,
	general-bounces@...ts.openfabrics.org, Robin Holt <holt@....com>,
	izike@...ranet.com, kvm-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Rik van Riel <riel@...hat.com>, steiner@....com
Subject: Re: [ofa-general] Re: Demand paging for memory regions

On Wed, 13 Feb 2008, Christoph Raisch wrote:

> For ehca we currently can't modify a large MR when it has been allocated.
> EHCA Hardware expects the pages to be there (MRs must not have "holes").
> This is also true for the global MR covering all kernel space.
> Therefore we still need the memory to be "pinned" if ib_umem_get() is
> called.

It cannot be freed and then reallocated? What happens when a process 
exists?

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