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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 033C4C07E95 for ; Tue, 20 Jul 2021 06:02:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C89E361175 for ; Tue, 20 Jul 2021 06:02:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232449AbhGTFVW (ORCPT ); Tue, 20 Jul 2021 01:21:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40340 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230194AbhGTFVT (ORCPT ); Tue, 20 Jul 2021 01:21:19 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B641EC061574; Mon, 19 Jul 2021 23:01:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=NJ3TnWE3CL0wCjaiOk58xi8Kq4FRhK9oxiKVctZ3D60=; b=rn5ZFwUvcWRYS0mpREkxIlmfgZ EvkGHPZ5mFRP90cFNx1iVBYjdd0PM7Q8nGgWf/VxFPA7ZlgUPOUNo4MwRUkLxy1NTkzvWSVpmwBZ1 eSk/pKAggVlWWdzeZsojXFs7jFPUfICnddHBJqR3/dukxJTM+VwXHRWKn8fJzZY/PT7TmA/zbHm2S nLiWyvSYEOeRDHi1I8WOI/s3YdDZT05amZCl8UtVflnp1NISmVv12YCfQjFa1iUaDHWvkaqILz9Sv S3EZL21Jd/Fw4wkbNJN/LOazIf+M2Ke7gxAerKd/B/bwTAaEIlx73P3a64OsWVxzWilzW1hCD2pR0 vBfUnjwA==; Received: from hch by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1m5iom-007o6C-BX; Tue, 20 Jul 2021 06:01:33 +0000 Date: Tue, 20 Jul 2021 07:01:24 +0100 From: Christoph Hellwig To: Bart Van Assche Cc: longli@linuxonhyperv.com, linux-fs@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, Long Li Subject: Re: [Patch v4 0/3] Introduce a driver to support host accelerated access to Microsoft Azure Blob Message-ID: References: <1626751866-15765-1-git-send-email-longli@linuxonhyperv.com> <82e8bec6-4f6f-08d7-90db-9661f675749d@acm.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <82e8bec6-4f6f-08d7-90db-9661f675749d@acm.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Mon, Jul 19, 2021 at 09:37:56PM -0700, Bart Van Assche wrote: > such that this object storage driver can be implemented as a user-space > library instead of as a kernel driver? As you may know vfio users can > either use eventfds for completion notifications or polling. An > interface like io_uring can be built easily on top of vfio. Yes. Similar to say the NVMe K/V command set this does not look like a candidate for a kernel driver.