From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ADCECEB64DC for ; Tue, 11 Jul 2023 16:01:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=gAn9X4pt0OF0yGjQwM1LdhzVVicYr14VIgqbHgngTmo=; b=wZ/AVx/k9pvNdB LkqpogjQ+krpaLN3RlZfuniGjL34cyk9UHwsX1ycicZuE6JflaDb3poNCzSCevAAosEcFZVhtKD+T 0huBOzz8XKoE8ZKAuN/iXIBQiZDIdgw4Thm/wHc6bURplO7S1CGeBKY6zVMQnDlXKteBkkjcRzHKm d41eXWppP0LTBwEq3JhExYX3RR6gnv2RlEaChrzQ9cQOZW5yhU0LMxlu9mI6/exAieblMnTuGkm8U lNrqh/G7MSMl53aUqH57m8tdAxXiBUEO5IGB3YcDfcRzm5oKGGipgz4Sozt6z+/rdnd9EYFenHXkM /ubBS6DL/zMchY/2+Z0w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qJFnL-00FKRj-0B; Tue, 11 Jul 2023 16:00:55 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qJFnI-00FKQj-0Z; Tue, 11 Jul 2023 16:00:53 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 401436155E; Tue, 11 Jul 2023 16:00:51 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B73A1C433C8; Tue, 11 Jul 2023 16:00:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1689091250; bh=qJNl12vo3sFEgIC9eU4i4GFHtknelm6lEufyoqloygg=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=H5Pjqt9ztd1rsXJxiMRPURZwTa2ExxdjvmdAB+R2m6SIGj9BZXzsFh8fGEuiSTvcm judzO3qp7mqlviGZdHfT9sbnjnh7490DvZQa7s5T+0mqaBlhZbmTkQYKjneddOr+zU I70OFnP7HqecLR1sMTBg5IyfCTdYnn+/rbEAn2glXwwMxHVhQ+QwarY7jc03Bi7ww2 byWkJRLIUtz0tkaUzKuPvGqtrAhdOE7ZFL4wWDtTcgcgau59/IWCMnMGAP6m8DA2sQ fnlNevf7wZVPt1tPCiqMTLRIvyGYwZut8EY+Mzks1hOkDrkQuZgqAklkfJWwGQfh+U q8F+qHZDvJx3w== Date: Tue, 11 Jul 2023 09:00:47 -0700 From: Jakub Kicinski To: Jason Gunthorpe , Christoph Hellwig Cc: Mina Almasry , John Hubbard , Dan Williams , David Ahern , Jesper Dangaard Brouer , brouer@redhat.com, Alexander Duyck , Yunsheng Lin , davem@davemloft.net, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Lorenzo Bianconi , Yisen Zhuang , Salil Mehta , Eric Dumazet , Sunil Goutham , Geetha sowjanya , Subbaraya Sundeep , hariprasad , Saeed Mahameed , Leon Romanovsky , Felix Fietkau , Ryder Lee , Shayne Chen , Sean Wang , Kalle Valo , Matthias Brugger , AngeloGioacchino Del Regno , Jesper Dangaard Brouer , Ilias Apalodimas , linux-rdma@vger.kernel.org, linux-wireless@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Jonathan Lemon Subject: Re: Memory providers multiplexing (Was: [PATCH net-next v4 4/5] page_pool: remove PP_FLAG_PAGE_FRAG flag) Message-ID: <20230711090047.37d7fe06@kernel.org> In-Reply-To: References: <5e0ac5bb-2cfa-3b58-9503-1e161f3c9bd5@kernel.org> <20230711042708.GA18658@lst.de> <20230710215906.49514550@kernel.org> <20230711050445.GA19323@lst.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230711_090052_298709_7BA69A65 X-CRM114-Status: GOOD ( 16.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 11 Jul 2023 09:05:02 -0300 Jason Gunthorpe wrote: > On Tue, Jul 11, 2023 at 07:04:45AM +0200, Christoph Hellwig wrote: > > On Mon, Jul 10, 2023 at 09:59:06PM -0700, Jakub Kicinski wrote: > > > Noob question - how does RDMA integrate with the out of tree junk? > > > AFAIU it's possible to run the "in-tree" RDMA stack and get "GPU > > > direct". > > > > I don't care and it has absolutel no business being discussed here. My question was genuine. If you think the code is dog shit I will make no argument for merging it. I just get hives from looking at proprietary code so I was hoping someone could explain how the proprietary stacks get it done. > > FYI at leat iWarp is a totally open standard. And I'm sure someone cares about that. I care about open source. I think people in the networking world have a deeper understanding of standardization processes, and their practical implication for open source and hack-ability. If all usable implementations are proprietary the standard could as well not exist. That may be a little hard to understand for folks coming from storage and fabric worlds where the interesting bits of the implementation was pretty much always closed. > So is Infiniband, Jakub has a unique definition of "proprietary". For IB AFAIU there's only one practically usable vendor, such an impressive ecosystem!! > RDMA works with the AMD and Intel intree drivers using DMABUF without > requiring struct pages using the DRM hacky scatterlist approach. I see, thanks. We need pages primarily for refcounting. Avoiding all the infamous problems with memory pins. Oh well. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel