From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate4.de.ibm.com (8.13.8/8.13.8) with ESMTP id m1DGCnSQ037144 for ; Wed, 13 Feb 2008 16:12:49 GMT Received: from d12av04.megacenter.de.ibm.com (d12av04.megacenter.de.ibm.com [9.149.165.229]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v8.7) with ESMTP id m1DGCn0Z2248898 for ; Wed, 13 Feb 2008 17:12:49 +0100 Received: from d12av04.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av04.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id m1DGCmeR007624 for ; Wed, 13 Feb 2008 17:12:48 +0100 In-Reply-To: References: <20080208155641.2258ad2c.akpm@linux-foundation.org> <20080209012446.GB7051@v2.random> <20080209015659.GC7051@v2.random> <20080209075556.63062452@bree.surriel.com> <47B2174E.5000708@opengridcomputing.com> Subject: Re: [ofa-general] Re: Demand paging for memory regions Message-ID: From: Christoph Raisch Date: Wed, 13 Feb 2008 13:11:51 +0100 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Roland Dreier Cc: Andrew Morton , Andrea Arcangeli , avi@qumranet.com, a.p.zijlstra@chello.nl, Christoph Lameter , daniel.blueman@quadrics.com, general@lists.openfabrics.org, general-bounces@lists.openfabrics.org, Robin Holt , izike@qumranet.com, kvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Rik van Riel , steiner@sgi.com List-ID: > > > Chelsio's T3 HW doesn't support this. 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. So with the current implementation we don't have much use for a notifier. "It is difficult to make predictions, especially about the future" Gruss / Regards Christoph Raisch + Hoang-Nam Nguyen -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org