From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC84C3009D2; Mon, 19 Jan 2026 10:29:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768818542; cv=none; b=ks6UosvvUgIg2F1gP3iq/okCcLQW76iUCDHFxoDVxu9CSCuPfI78TzR8BWvyWJaBjdmI7bJ5PadNH3uTTKGTL50UKLWY5216FdsYPhMlzMrfAwtlVqoCN62/u+xtZmCZKoO6Txw6jpvDCDyR9TK6Vj3h6vtY1G3UfGejuPjLhzg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768818542; c=relaxed/simple; bh=JFte37+nWfx9d3aoqalLh5+SJkBFQF3RzJyuAQQN5ag=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Kw5KQpNUWHalJxP1KagVyh2xPWsjMAxLvqf3b9H4Lrw29xFySQYW9xtrt1aWJ5JbSnRdsZwaQjJY6DbXK75UUmHZ2CxepqLtJkp6LXrjtvQ7hs7fb8ARf5GrTHh5BIbRQAKN9pv8wAo8YQzlSnEfbuezDCU12VAPImFSATk4B1c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=e6cInx9L; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="e6cInx9L" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E1DEEC116C6; Mon, 19 Jan 2026 10:29:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768818542; bh=JFte37+nWfx9d3aoqalLh5+SJkBFQF3RzJyuAQQN5ag=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=e6cInx9LgaXNDQDOOojsgnXWe31Vs73S1igaVj1+oimpn8vlhQeHvTmZbwEAoqjQN rX6vlOAObGvBUsjD01LF8A2NPVphfjYRVRa7pr4NDSWhkU0ZX5O4gpzMeEpLwZ6ode /3hyxIhhBOcQsQL1F31WaJfPrw9KWCHb+Fj5YK+Vl3gCj8nivRDkTkV+2BJeTeJtZr Xs8KmSUwdrzrzqldV0VbmFXCa2obdf8zbOnd9CxjWa/aaM+9iayhhWRQ1bi4JXJ9UF Fi7yM3JM7j4RbJ9Z8xmVp54iuCsIkY235oSPSGNgx8riDRjUXYKWNB1+V9zQgev2If zWbb0uJp/rAeg== Date: Mon, 19 Jan 2026 12:28:57 +0200 From: Leon Romanovsky To: Christoph Hellwig Cc: Chuck Lever , Jason Gunthorpe , linux-rdma@vger.kernel.org, linux-nfs@vger.kernel.org, NeilBrown , Jeff Layton , Olga Kornievskaia , Dai Ngo , Tom Talpey , Chuck Lever Subject: Re: [PATCH v1 1/4] RDMA/core: add bio_vec based RDMA read/write API Message-ID: <20260119102857.GI13201@unreal> References: <20260114143948.3946615-1-cel@kernel.org> <20260114143948.3946615-2-cel@kernel.org> <20260115155334.GB14083@lst.de> <20260116212425.GJ14359@unreal> <20260119065212.GA1423@lst.de> Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260119065212.GA1423@lst.de> On Mon, Jan 19, 2026 at 07:52:12AM +0100, Christoph Hellwig wrote: > On Fri, Jan 16, 2026 at 04:49:06PM -0500, Chuck Lever wrote: > > >> Hmm, if we need to split/adjust bvecs, it might be better to > > >> pass a bvec_iter and let the iter handle the iteration? > > > > > > It would also be worthwhile to support P2P scenarios in this flow. > > > > I can add some code to this series to do that, but I don't believe > > I have facilities to test it. > > Please don't add untested code. If Leon wants the P2P support and > volunteers to test it, sure. I can do it with the help of how to setup the system. > But let's not merge it without being tested. And at least for NFS I don't > really see how P2P would easily fit in anyway. Chuck is proposing a new IB/core API that will also be used by NVMe too. Wouldn't p2p be useful in the general case Thanks > >