Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261821AbVDKP6s (ORCPT ); Mon, 11 Apr 2005 11:58:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261825AbVDKP6s (ORCPT ); Mon, 11 Apr 2005 11:58:48 -0400 Received: from webmail.topspin.com ([12.162.17.3]:23151 "EHLO exch-1.topspincom.com") by vger.kernel.org with ESMTP id S261821AbVDKP6j (ORCPT ); Mon, 11 Apr 2005 11:58:39 -0400 To: Troy Benjegerdes Cc: linux-kernel@vger.kernel.org, openib-general@openib.org Subject: Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation X-Message-Flag: Warning: May contain useful information References: <200544159.Ahk9l0puXy39U6u6@topspin.com> <20050411142213.GC26127@kalmia.hozed.org> From: Roland Dreier Date: Mon, 11 Apr 2005 08:34:19 -0700 In-Reply-To: <20050411142213.GC26127@kalmia.hozed.org> (Troy Benjegerdes's message of "Mon, 11 Apr 2005 09:22:13 -0500") Message-ID: <52mzs51g5g.fsf@topspin.com> User-Agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Jumbo Shrimp, linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-OriginalArrivalTime: 11 Apr 2005 15:34:19.0546 (UTC) FILETIME=[ED895FA0:01C53EAB] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 961 Lines: 23 Troy> How is memory pinning handled? (I haven't had time to read Troy> all the code, so please excuse my ignorance of something Troy> obvious). The userspace library calls mlock() and then the kernel does get_user_pages(). Troy> The old mellanox drivers used to have a hack to call Troy> 'sys_mlock', and promiscuously lock memory any old userspace Troy> application asked for. What is the API for the new uverbs Troy> memory registration, and how will things like memory hotplug Troy> and NUMA page migration be able to unpin pages locked by a Troy> user program? The API for uverbs memory registration is ibv_reg_mr(), and right now the memory is pinned and that's it. - R. - 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/