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 77062C433FE for ; Fri, 4 Dec 2020 10:34:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3321F22519 for ; Fri, 4 Dec 2020 10:34:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729885AbgLDKec (ORCPT ); Fri, 4 Dec 2020 05:34:32 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729032AbgLDKec (ORCPT ); Fri, 4 Dec 2020 05:34:32 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6D3BC0613D1; Fri, 4 Dec 2020 02:33:51 -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=z4RxJ3lOSf3eG4bi7IMzxDt9+2ZdQf43ibMQAm5S5Cs=; b=NfDRc7jAkWAZV7HxvQycJbxxwU MwxwTmRFOXnQ/I7U03uMlUr1gihelQ0GWLdiUp63iF+2zEHep2wIxxgpaJOAbS8VSlWXWfsFQAb3u ng7ZJVP6LTB01hxBMvfG5ABRMrvBqL+Zp16RiGXEP6QL3/RwyTpIf7b5qqIQ14SA7NBqCK+2EaXgr MPy3NUVs/UpL8esdYQ9ZpYT2aMWF5lt7kerOtdy1BUU+4Ki8ewX+YX1MtoqOqEkO/Y5KJnkYMuZ9l Sa7irtV0l9SkW2YwCW7fy6OtFTO8x6ECH1hez8fi49JV4+zuDVR2gdx6TzJv/7WjVr8EUOXFMSX35 VUstmX5w==; Received: from hch by casper.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1kl8PA-000230-Ol; Fri, 04 Dec 2020 10:33:36 +0000 Date: Fri, 4 Dec 2020 10:33:36 +0000 From: Christoph Hellwig To: Palmer Dabbelt Cc: dm-devel@redhat.com, agk@redhat.com, snitzer@redhat.com, corbet@lwn.net, song@kernel.org, Palmer Dabbelt , shuah@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, linux-kselftest@vger.kernel.org, kernel-team@android.com Subject: Re: [PATCH v1 0/5] dm: dm-user: New target that proxies BIOs to userspace Message-ID: <20201204103336.GA7374@infradead.org> References: <20201203215859.2719888-1-palmer@dabbelt.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201203215859.2719888-1-palmer@dabbelt.com> 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-kernel@vger.kernel.org What is the advantage over simply using nbd?