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 A03BEC433E6 for ; Wed, 23 Dec 2020 07:50:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 64513224BE for ; Wed, 23 Dec 2020 07:50:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727800AbgLWHtv (ORCPT ); Wed, 23 Dec 2020 02:49:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727179AbgLWHtv (ORCPT ); Wed, 23 Dec 2020 02:49:51 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 126BDC0613D3; Tue, 22 Dec 2020 23:49:11 -0800 (PST) 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=VJA2Gqy8jGT0RgzTT5UVlJfq4XprQm8NpWSKksAaoTw=; b=Y2KK7HRkXqg1VLN9ubpTwYDI0w Ep+SKigC5jwe2uB1UnUMz3uOsrVasAiYXZUzP9QprSSBjPJVqSZvomAb9NqBq8/VzqcNEclwAUs/a 9DpG7xDpanTsGh1QSz6ldIcRgzZwLujXZ+nZ/jcAJSf48gFxTkatMqAmJmc2aOcQMSVzk2xyxf/9+ tGNvyc4LINYaZpwmksQKJ4Mnlp6k069qYALw9MkYmOSKZVWgpS4Mesca9CJVr2T0TaIpy6LcqkJTl 9gjBt/ayYYok4M0W0gqXj+mKdlMVIPkSK6Ni3DTGAUivYygjDnO58CGjHXQgH7OiKrcppizSGoHq+ xahlPh9g==; Received: from hch by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kryt8-00046B-Vc; Wed, 23 Dec 2020 07:48:52 +0000 Date: Wed, 23 Dec 2020 07:48:50 +0000 From: Christoph Hellwig To: Palmer Dabbelt Cc: snitzer@redhat.com, Christoph Hellwig , josef@toxicpanda.com, bvanassche@acm.org, corbet@lwn.net, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, song@kernel.org, dm-devel@redhat.com, linux-kselftest@vger.kernel.org, shuah@kernel.org, agk@redhat.com, michael.christie@oracle.com Subject: Re: [PATCH v1 0/5] dm: dm-user: New target that proxies BIOs to userspace Message-ID: <20201223074850.GA15369@infradead.org> References: <20201222143616.GB12885@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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-raid@vger.kernel.org FYI, a few years ago I spent some time helping a customer to prepare their block device in userspace using fuse code for upstreaming, but at some point they abandoned the project. But if for some reason we don't want to use nbd I think a driver using the fuse infrastructure would be the next logical choice.