From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9CFEB6D00 for ; Mon, 24 May 2021 07:24:17 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id BD6A867373; Mon, 24 May 2021 09:24:13 +0200 (CEST) Date: Mon, 24 May 2021 09:24:13 +0200 From: Christoph Hellwig To: Luis Chamberlain Cc: Christoph Hellwig , Jens Axboe , Geert Uytterhoeven , Chris Zankel , Max Filippov , Philipp Reisner , Lars Ellenberg , Jim Paris , Joshua Morris , Philip Kelleher , Minchan Kim , Nitin Gupta , Matias Bjorling , Coly Li , Mike Snitzer , Song Liu , Maxim Levitsky , Alex Dubov , Ulf Hansson , Dan Williams , Vishal Verma , Dave Jiang , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , linux-xtensa@linux-xtensa.org, linux-m68k@vger.kernel.org, linux-raid@vger.kernel.org, nvdimm@lists.linux.dev, linux-s390@vger.kernel.org, linux-mmc@vger.kernel.org, linux-bcache@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, dm-devel@redhat.com, drbd-dev@tron.linbit.com, linuxppc-dev@lists.ozlabs.org Subject: Re: [dm-devel] [PATCH 05/26] block: add blk_alloc_disk and blk_cleanup_disk APIs Message-ID: <20210524072413.GC23890@lst.de> References: <20210521055116.1053587-1-hch@lst.de> <20210521055116.1053587-6-hch@lst.de> <20210521174407.GA25291@42.do-not-panic.com> X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210521174407.GA25291@42.do-not-panic.com> User-Agent: Mutt/1.5.17 (2007-11-01) On Fri, May 21, 2021 at 05:44:07PM +0000, Luis Chamberlain wrote: > Its not obvious to me why using this new API requires you then to > set minors explicitly to 1, and yet here underneath we see the minors > argument passed is 0. > > Nor is it clear from the documentation. Basically for all new drivers no one should set minors at all, and the dynamic dev_t mechanism does all the work. For converted old drivers minors is set manually instead of being passed an an argument that should be 0 for all new drivers. 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=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 8F0B4C04FF3 for ; Mon, 24 May 2021 22:17:28 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id ED7076101B for ; Mon, 24 May 2021 22:17:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ED7076101B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=9rI2FgimGyLbGC1iy5L0omzC5pHXVgO6iuM8001+ups=; b=gMiZx6J5X6ftFp 6R6Lkvpf1CrphLQxl82AGE90m3pmOKzDadN6UqGmOFEKJPjyerMDQNFLNaa1GBV3/BzGogRGF1b0P C+fGQldZetHvs4449ciNf6Hi0otXsFpeHchseT0ZlM7aeUgcIVVX1RaustR0jb/4NTGvxhD40PlEH nhRFvBe7FhwSbJpAaDOLY8WMIrghY5gFw7S5op28vC79Z5m6PqulrOBJAWiOSruiDGQGB5LSoWmkG 01ajOhSKRpFjvO7ssTjl/Yw5eSQzQa2NEzZbTm3MWfqb8QxoMMt724X9sTDh84fe45OyEymwDyKXI 4RTY8lax0fMsDKhbipwg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1llIsl-0025TL-MM; Mon, 24 May 2021 22:17:07 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1ll4wj-000k0h-8l for linux-nvme@lists.infradead.org; Mon, 24 May 2021 07:24:18 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id BD6A867373; Mon, 24 May 2021 09:24:13 +0200 (CEST) Date: Mon, 24 May 2021 09:24:13 +0200 From: Christoph Hellwig To: Luis Chamberlain Cc: Christoph Hellwig , Jens Axboe , Geert Uytterhoeven , Chris Zankel , Max Filippov , Philipp Reisner , Lars Ellenberg , Jim Paris , Joshua Morris , Philip Kelleher , Minchan Kim , Nitin Gupta , Matias Bjorling , Coly Li , Mike Snitzer , Song Liu , Maxim Levitsky , Alex Dubov , Ulf Hansson , Dan Williams , Vishal Verma , Dave Jiang , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , linux-xtensa@linux-xtensa.org, linux-m68k@vger.kernel.org, linux-raid@vger.kernel.org, nvdimm@lists.linux.dev, linux-s390@vger.kernel.org, linux-mmc@vger.kernel.org, linux-bcache@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, dm-devel@redhat.com, drbd-dev@tron.linbit.com, linuxppc-dev@lists.ozlabs.org Subject: Re: [dm-devel] [PATCH 05/26] block: add blk_alloc_disk and blk_cleanup_disk APIs Message-ID: <20210524072413.GC23890@lst.de> References: <20210521055116.1053587-1-hch@lst.de> <20210521055116.1053587-6-hch@lst.de> <20210521174407.GA25291@42.do-not-panic.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210521174407.GA25291@42.do-not-panic.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-20210524_002417_481498_95749B26 X-CRM114-Status: GOOD ( 13.71 ) X-Mailman-Approved-At: Mon, 24 May 2021 11:59:45 -0700 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Fri, May 21, 2021 at 05:44:07PM +0000, Luis Chamberlain wrote: > Its not obvious to me why using this new API requires you then to > set minors explicitly to 1, and yet here underneath we see the minors > argument passed is 0. > > Nor is it clear from the documentation. Basically for all new drivers no one should set minors at all, and the dynamic dev_t mechanism does all the work. For converted old drivers minors is set manually instead of being passed an an argument that should be 0 for all new drivers. _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme 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=-5.3 required=3.0 tests=BAYES_00, 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 71C81C04FF3 for ; Mon, 24 May 2021 07:24:40 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 F3B5561151 for ; Mon, 24 May 2021 07:24:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F3B5561151 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4FpTHV3jcNz3bt7 for ; Mon, 24 May 2021 17:24:38 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lst.de (client-ip=213.95.11.211; helo=verein.lst.de; envelope-from=hch@lst.de; receiver=) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4FpTH65zv4z2xZH for ; Mon, 24 May 2021 17:24:18 +1000 (AEST) Received: by verein.lst.de (Postfix, from userid 2407) id BD6A867373; Mon, 24 May 2021 09:24:13 +0200 (CEST) Date: Mon, 24 May 2021 09:24:13 +0200 From: Christoph Hellwig To: Luis Chamberlain Subject: Re: [dm-devel] [PATCH 05/26] block: add blk_alloc_disk and blk_cleanup_disk APIs Message-ID: <20210524072413.GC23890@lst.de> References: <20210521055116.1053587-1-hch@lst.de> <20210521055116.1053587-6-hch@lst.de> <20210521174407.GA25291@42.do-not-panic.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210521174407.GA25291@42.do-not-panic.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: nvdimm@lists.linux.dev, Ulf Hansson , Mike Snitzer , linux-m68k@vger.kernel.org, linux-nvme@lists.infradead.org, Song Liu , dm-devel@redhat.com, Joshua Morris , linux-s390@vger.kernel.org, Dave Jiang , Maxim Levitsky , Vishal Verma , Christoph Hellwig , Christian Borntraeger , Geert Uytterhoeven , Matias Bjorling , Nitin Gupta , Vasily Gorbik , linux-xtensa@linux-xtensa.org, Alex Dubov , Heiko Carstens , Coly Li , linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, drbd-dev@tron.linbit.com, Philip Kelleher , Dan Williams , Jens Axboe , Chris Zankel , Max Filippov , linux-mmc@vger.kernel.org, Philipp Reisner , Jim Paris , Minchan Kim , Lars Ellenberg , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, May 21, 2021 at 05:44:07PM +0000, Luis Chamberlain wrote: > Its not obvious to me why using this new API requires you then to > set minors explicitly to 1, and yet here underneath we see the minors > argument passed is 0. > > Nor is it clear from the documentation. Basically for all new drivers no one should set minors at all, and the dynamic dev_t mechanism does all the work. For converted old drivers minors is set manually instead of being passed an an argument that should be 0 for all new drivers. 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=-5.3 required=3.0 tests=BAYES_00, 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 7E08DC04FF3 for ; Mon, 24 May 2021 07:24:35 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) (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 03B8461153 for ; Mon, 24 May 2021 07:24:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 03B8461153 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; 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Mon, 24 May 2021 03:24:23 -0400 Received: by smtp.corp.redhat.com (Postfix) id 299C21111A54; Mon, 24 May 2021 07:24:23 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast05.extmail.prod.ext.rdu2.redhat.com [10.11.55.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 24B8D1111A53 for ; Mon, 24 May 2021 07:24:19 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-1.mimecast.com [205.139.110.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A4AFA8339B9 for ; Mon, 24 May 2021 07:24:19 +0000 (UTC) Received: from verein.lst.de (verein.lst.de [213.95.11.211]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-588-3ZTpaNXsMcKj17GPwaO1sQ-1; Mon, 24 May 2021 03:24:17 -0400 X-MC-Unique: 3ZTpaNXsMcKj17GPwaO1sQ-1 Received: by verein.lst.de (Postfix, from userid 2407) id BD6A867373; Mon, 24 May 2021 09:24:13 +0200 (CEST) Date: Mon, 24 May 2021 09:24:13 +0200 From: Christoph Hellwig To: Luis Chamberlain Message-ID: <20210524072413.GC23890@lst.de> References: <20210521055116.1053587-1-hch@lst.de> <20210521055116.1053587-6-hch@lst.de> <20210521174407.GA25291@42.do-not-panic.com> MIME-Version: 1.0 In-Reply-To: <20210521174407.GA25291@42.do-not-panic.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-loop: dm-devel@redhat.com Cc: nvdimm@lists.linux.dev, Ulf Hansson , Mike Snitzer , linux-m68k@vger.kernel.org, linux-nvme@lists.infradead.org, Song Liu , dm-devel@redhat.com, Joshua Morris , linux-s390@vger.kernel.org, Dave Jiang , Maxim Levitsky , Vishal Verma , Christoph Hellwig , Christian Borntraeger , Geert Uytterhoeven , Matias Bjorling , Nitin Gupta , Vasily Gorbik , linux-xtensa@linux-xtensa.org, Alex Dubov , Heiko Carstens , Coly Li , linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, drbd-dev@tron.linbit.com, Philip Kelleher , Dan Williams , Jens Axboe , Chris Zankel , Max Filippov , linux-mmc@vger.kernel.org, Philipp Reisner , Jim Paris , Minchan Kim , Lars Ellenberg , linuxppc-dev@lists.ozlabs.org Subject: Re: [dm-devel] [PATCH 05/26] block: add blk_alloc_disk and blk_cleanup_disk APIs 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 10.5.11.16 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 Fri, May 21, 2021 at 05:44:07PM +0000, Luis Chamberlain wrote: > Its not obvious to me why using this new API requires you then to > set minors explicitly to 1, and yet here underneath we see the minors > argument passed is 0. > > Nor is it clear from the documentation. Basically for all new drivers no one should set minors at all, and the dynamic dev_t mechanism does all the work. For converted old drivers minors is set manually instead of being passed an an argument that should be 0 for all new drivers. -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel