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=-15.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 91FBDC64E69 for ; Fri, 20 Nov 2020 07:55:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59E5622400 for ; Fri, 20 Nov 2020 07:55:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725919AbgKTHzb (ORCPT ); Fri, 20 Nov 2020 02:55:31 -0500 Received: from mx2.suse.de ([195.135.220.15]:44682 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725768AbgKTHzb (ORCPT ); Fri, 20 Nov 2020 02:55:31 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 9D32FAC23; Fri, 20 Nov 2020 07:55:29 +0000 (UTC) Subject: Re: [PATCH 69/78] block: remove the nr_sects field in struct hd_struct To: Christoph Hellwig , Jens Axboe Cc: Justin Sanders , Josef Bacik , Ilya Dryomov , Jack Wang , "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Konrad Rzeszutek Wilk , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , Minchan Kim , Mike Snitzer , Song Liu , "Martin K. Petersen" , dm-devel@redhat.com, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-raid@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org References: <20201116145809.410558-1-hch@lst.de> <20201116145809.410558-70-hch@lst.de> From: Hannes Reinecke Message-ID: Date: Fri, 20 Nov 2020 08:55:27 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201116145809.410558-70-hch@lst.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On 11/16/20 3:58 PM, Christoph Hellwig wrote: > Now that the hd_struct always has a block device attached to it, there is > no need for having two size field that just get out of sync. > > Additional the field in hd_struct did not use proper serializiation, > possibly allowing for torn writes. By only using the block_device field > this problem also gets fixed. > > Signed-off-by: Christoph Hellwig > --- > block/bio.c | 2 +- > block/blk-core.c | 2 +- > block/blk.h | 53 ---------------------- > block/genhd.c | 34 +++++++------- > block/partitions/core.c | 17 ++++--- > drivers/block/loop.c | 1 - > drivers/block/nbd.c | 2 +- > drivers/block/xen-blkback/common.h | 4 +- > drivers/md/bcache/super.c | 2 +- > drivers/s390/block/dasd_ioctl.c | 4 +- > drivers/target/target_core_pscsi.c | 7 +-- > fs/block_dev.c | 73 +----------------------------- > fs/f2fs/super.c | 2 +- > fs/pstore/blk.c | 2 +- > include/linux/genhd.h | 29 +++--------- > kernel/trace/blktrace.c | 2 +- > 16 files changed, 47 insertions(+), 189 deletions(-) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke Kernel Storage Architect hare@suse.de +49 911 74053 688 SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer 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=-15.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 00D08C5519F for ; Fri, 20 Nov 2020 07:55:38 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 6DDC1222BA for ; Fri, 20 Nov 2020 07:55:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pUetmaZa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6DDC1222BA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.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=merlin.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=KYyO6ssYNZyHwM3QWaHWEbAYgmMeKVE4evsDstRrpbI=; b=pUetmaZamB6rSkp2YRsZu+D2F 5UW/LzfmaS1kdu5VVfTNFrp6kPC1IMf3qqy8bsh0dbAqNP4qXrgpya1pJ3IQFpUPDMEcSeq0HHxRR lBBgbH9Vx08maTxy8vJlkkdC8ViRMw9hiFFvEARdmE6p45rpH0veOfqPy1D1ZYyTp0dVwOYuoOmP/ jqZkMCk/W2q5IgyIqRWpzf430bSwMkCf+S6NcICWlpG45XXwJA+A2cDwhrdvzl93cxMtRkOjfKzes KeBzR/cl2oLntZRfJ6479Kev5N5mJPW0XqF8DmXBsDTIDirTaz8qAXQ3Q2mc/opFFPiWkAQZlGrsQ +ShZWP8KQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kg1GX-0001nW-GT; Fri, 20 Nov 2020 07:55:33 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kg1GU-0001lp-Sn for linux-nvme@lists.infradead.org; Fri, 20 Nov 2020 07:55:32 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 9D32FAC23; Fri, 20 Nov 2020 07:55:29 +0000 (UTC) Subject: Re: [PATCH 69/78] block: remove the nr_sects field in struct hd_struct To: Christoph Hellwig , Jens Axboe References: <20201116145809.410558-1-hch@lst.de> <20201116145809.410558-70-hch@lst.de> From: Hannes Reinecke Message-ID: Date: Fri, 20 Nov 2020 08:55:27 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201116145809.410558-70-hch@lst.de> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201120_025531_099569_27D62A8B X-CRM114-Status: GOOD ( 19.84 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Justin Sanders , Mike Snitzer , "Michael S. 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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 10.11.54.4 X-MIME-Autoconverted: from quoted-printable to 8bit by lists01.pubmisc.prod.ext.phx2.redhat.com id 0AK7teTQ007462 X-loop: dm-devel@redhat.com Cc: Justin Sanders , Mike Snitzer , "Michael S. Tsirkin" , Jason Wang , linux-nvme@lists.infradead.org, Song Liu , dm-devel@redhat.com, linux-scsi@vger.kernel.org, xen-devel@lists.xenproject.org, Ilya Dryomov , Jack Wang , Konrad Rzeszutek Wilk , Josef Bacik , nbd@other.debian.org, linux-raid@vger.kernel.org, Stefan Hajnoczi , drbd-dev@tron.linbit.com, ceph-devel@vger.kernel.org, linux-block@vger.kernel.org, "Martin K. Petersen" , Minchan Kim , linux-fsdevel@vger.kernel.org, Paolo Bonzini , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= Subject: Re: [dm-devel] [PATCH 69/78] block: remove the nr_sects field in struct hd_struct 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-Language: en-US Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" T24gMTEvMTYvMjAgMzo1OCBQTSwgQ2hyaXN0b3BoIEhlbGx3aWcgd3JvdGU6Cj4gTm93IHRoYXQg dGhlIGhkX3N0cnVjdCBhbHdheXMgaGFzIGEgYmxvY2sgZGV2aWNlIGF0dGFjaGVkIHRvIGl0LCB0 aGVyZSBpcwo+IG5vIG5lZWQgZm9yIGhhdmluZyB0d28gc2l6ZSBmaWVsZCB0aGF0IGp1c3QgZ2V0 IG91dCBvZiBzeW5jLgo+IAo+IEFkZGl0aW9uYWwgdGhlIGZpZWxkIGluIGhkX3N0cnVjdCBkaWQg bm90IHVzZSBwcm9wZXIgc2VyaWFsaXppYXRpb24sCj4gcG9zc2libHkgYWxsb3dpbmcgZm9yIHRv cm4gd3JpdGVzLiAgQnkgb25seSB1c2luZyB0aGUgYmxvY2tfZGV2aWNlIGZpZWxkCj4gdGhpcyBw cm9ibGVtIGFsc28gZ2V0cyBmaXhlZC4KPiAKPiBTaWduZWQtb2ZmLWJ5OiBDaHJpc3RvcGggSGVs bHdpZyA8aGNoQGxzdC5kZT4KPiAtLS0KPiAgIGJsb2NrL2Jpby5jICAgICAgICAgICAgICAgICAg ICAgICAgfCAgMiArLQo+ICAgYmxvY2svYmxrLWNvcmUuYyAgICAgICAgICAgICAgICAgICB8ICAy ICstCj4gICBibG9jay9ibGsuaCAgICAgICAgICAgICAgICAgICAgICAgIHwgNTMgLS0tLS0tLS0t LS0tLS0tLS0tLS0tLQo+ICAgYmxvY2svZ2VuaGQuYyAgICAgICAgICAgICAgICAgICAgICB8IDM0 ICsrKysrKystLS0tLS0tCj4gICBibG9jay9wYXJ0aXRpb25zL2NvcmUuYyAgICAgICAgICAgIHwg MTcgKysrKy0tLQo+ICAgZHJpdmVycy9ibG9jay9sb29wLmMgICAgICAgICAgICAgICB8ICAxIC0K PiAgIGRyaXZlcnMvYmxvY2svbmJkLmMgICAgICAgICAgICAgICAgfCAgMiArLQo+ICAgZHJpdmVy cy9ibG9jay94ZW4tYmxrYmFjay9jb21tb24uaCB8ICA0ICstCj4gICBkcml2ZXJzL21kL2JjYWNo ZS9zdXBlci5jICAgICAgICAgIHwgIDIgKy0KPiAgIGRyaXZlcnMvczM5MC9ibG9jay9kYXNkX2lv Y3RsLmMgICAgfCAgNCArLQo+ICAgZHJpdmVycy90YXJnZXQvdGFyZ2V0X2NvcmVfcHNjc2kuYyB8 ICA3ICstLQo+ICAgZnMvYmxvY2tfZGV2LmMgICAgICAgICAgICAgICAgICAgICB8IDczICstLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQo+ICAgZnMvZjJmcy9zdXBlci5jICAgICAgICAgICAg ICAgICAgICB8ICAyICstCj4gICBmcy9wc3RvcmUvYmxrLmMgICAgICAgICAgICAgICAgICAgIHwg IDIgKy0KPiAgIGluY2x1ZGUvbGludXgvZ2VuaGQuaCAgICAgICAgICAgICAgfCAyOSArKystLS0t LS0tLS0KPiAgIGtlcm5lbC90cmFjZS9ibGt0cmFjZS5jICAgICAgICAgICAgfCAgMiArLQo+ICAg MTYgZmlsZXMgY2hhbmdlZCwgNDcgaW5zZXJ0aW9ucygrKSwgMTg5IGRlbGV0aW9ucygtKQo+IApS ZXZpZXdlZC1ieTogSGFubmVzIFJlaW5lY2tlIDxoYXJlQHN1c2UuZGU+CgpDaGVlcnMsCgpIYW5u ZXMKLS0gCkRyLiBIYW5uZXMgUmVpbmVja2UgICAgICAgICAgICAgICAgS2VybmVsIFN0b3JhZ2Ug QXJjaGl0ZWN0CmhhcmVAc3VzZS5kZSAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICs0OSA5 MTEgNzQwNTMgNjg4ClNVU0UgU29mdHdhcmUgU29sdXRpb25zIEdtYkgsIE1heGZlbGRzdHIuIDUs IDkwNDA5IE7DvHJuYmVyZwpIUkIgMzY4MDkgKEFHIE7DvHJuYmVyZyksIEdlc2Now6RmdHNmw7xo cmVyOiBGZWxpeCBJbWVuZMO2cmZmZXIKCgotLQpkbS1kZXZlbCBtYWlsaW5nIGxpc3QKZG0tZGV2 ZWxAcmVkaGF0LmNvbQpodHRwczovL3d3dy5yZWRoYXQuY29tL21haWxtYW4vbGlzdGluZm8vZG0t ZGV2ZWw=