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 47432C433F5 for ; Sat, 12 Feb 2022 06:34:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=BSxTTSuJCPzNLp1nhK1TzG94P4swssSa4brDzIjNLrg=; b=lK4iyhHI+3n9vu8B/tV280rxTS ZXBFWm1ByeE6rphOvrB3pEMF+3zqGdYkbzsu0YYZmCKXl+NwU0OwGMLsms/7vGW9kpQN0eovc/Bem UFXPkyrzdqgxMOmUUbHeXe4nMxJcTFMa4/3DeB+sMr9L6LXzwSm++TbZ8hT5HQ/f4VdB8gGqK1uC8 orS966vALR2ZGE4rmOmfGzBPgdvf0wStLsfwDlPW7vAeUqOCPC8QEbUDoJsuLKALHMLgq9eHm9Z2u Q7clueQPrWWZNwUNm6h0YdexfbN2PyKYPWAbrRjFcjnjcOsOvG3avkBOY3nTmjvaxEFvahZ4X9Xl6 eh0M15Vw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nIlzO-009V6i-Ug; Sat, 12 Feb 2022 06:34:34 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nIlzL-009V61-Qw for linux-nvme@lists.infradead.org; Sat, 12 Feb 2022 06:34:33 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 3803D68AFE; Sat, 12 Feb 2022 07:34:23 +0100 (CET) Date: Sat, 12 Feb 2022 07:34:22 +0100 From: Christoph Hellwig To: Uday Shankar Cc: linux-nvme@lists.infradead.org, Prabhath Sajeepa , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg Subject: Re: Native multipath across multiple subsystem NQNs Message-ID: <20220212063422.GA16561@lst.de> References: <20220211220714.GA370236@dev-ushankar.dev.purestorage.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220211220714.GA370236@dev-ushankar.dev.purestorage.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220211_223432_042801_9B4DD80B X-CRM114-Status: UNSURE ( 9.02 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org The answer is neither. The fact that NVMe with ANA required namespaces to be be attached to the same subsystem is good and important. TPE 4034 is retrograde and completely broken in this respect and should have never been ratifier. Please fix your storage system to export virtual subsystems like everyone else and don't break the nice NVMe architecture.