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=-8.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 107B4C4320A for ; Tue, 10 Aug 2021 00:17:29 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B11DF61004 for ; Tue, 10 Aug 2021 00:17:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org B11DF61004 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=tempfail smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628554647; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=rNeZBN0K45wwS185rN2/6CuMO5t5b0pkBPMcjx9o5Dc=; b=Guw3fMJ+KJ2yPP+4Gfk/vNW/zsYkefDrPYlGDOcDpLgI9Q1UFwrTw7UVLZ+IHsjdCBUXFE 52t3jRA2krikn+wnrH4ABEUGtV46x+898Hol4YyepsDt9+mC8RcUNSuYx080wGSrRVzBDr cjpQob+xZsA9WjQlWjHJYXHr2NixpcE= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-414-Qti9G_-6OQqTGFMvWsvjyA-1; Mon, 09 Aug 2021 20:17:26 -0400 X-MC-Unique: Qti9G_-6OQqTGFMvWsvjyA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A9BBC801B3C; Tue, 10 Aug 2021 00:17:21 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7279B5D9C6; Tue, 10 Aug 2021 00:17:21 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 7C868180BAB1; Tue, 10 Aug 2021 00:17:20 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 17A0HJBY002713 for ; Mon, 9 Aug 2021 20:17:19 -0400 Received: by smtp.corp.redhat.com (Postfix) id 2A3EC5D6A8; Tue, 10 Aug 2021 00:17:19 +0000 (UTC) Received: from agk-cloud1.hosts.prod.upshift.rdu2.redhat.com (agk-cloud1.hosts.prod.upshift.rdu2.redhat.com [10.0.13.154]) by smtp.corp.redhat.com (Postfix) with ESMTP id C307366FFF; Tue, 10 Aug 2021 00:17:08 +0000 (UTC) Received: by agk-cloud1.hosts.prod.upshift.rdu2.redhat.com (Postfix, from userid 3883) id C86B642C4190; Tue, 10 Aug 2021 01:17:09 +0100 (BST) Date: Tue, 10 Aug 2021 01:17:09 +0100 From: Alasdair G Kergon To: Christoph Hellwig Message-ID: <20210810001709.GA101579@agk-cloud1.hosts.prod.upshift.rdu2.redhat.com> Mail-Followup-To: Christoph Hellwig , Jens Axboe , Mike Snitzer , linux-block@vger.kernel.org, dm-devel@redhat.com, prajnoha@redhat.com References: <20210804094147.459763-8-hch@lst.de> <20210809233143.GA101480@agk-cloud1.hosts.prod.upshift.rdu2.redhat.com> MIME-Version: 1.0 In-Reply-To: <20210809233143.GA101480@agk-cloud1.hosts.prod.upshift.rdu2.redhat.com> Organization: Red Hat UK Ltd. 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User-Agent: Mutt/1.5.21 (2010-09-15) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-loop: dm-devel@redhat.com Cc: Jens Axboe , linux-block@vger.kernel.org, dm-devel@redhat.com, prajnoha@redhat.com, Mike Snitzer Subject: Re: [dm-devel] [PATCH 7/8] dm: delay registering the gendisk X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Tue, Aug 10, 2021 at 12:31:43AM +0100, Alasdair G Kergon wrote: > When loading tables, our tools also always refer to devices using > the 'major:minor' format, which isn't affected, rather than using ^^^^^^^^^^^^^^^^^^^^ Wrong - that is also affected. So there is a new general constraint that a table must be loaded into a device before another device's table can reference that device. (The stacked device handling in lvm2 as supported by libdevmapper should always be doing this.) (The original implementation had to be a bit loose to accommodate multipath device paths that were essentially placeholders at the point they got set up.) Alasdair -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel