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Wed, 1 Apr 2020 15:01:24 +0000 From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Subject: [PATCH v2 0/6] nbd: reduce max_block restrictions Date: Wed, 1 Apr 2020 18:01:06 +0300 Message-ID: <20200401150112.9557-1-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain X-ClientProxiedBy: AM4P190CA0012.EURP190.PROD.OUTLOOK.COM (2603:10a6:200:56::22) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from kvm.sw.ru (185.215.60.23) by AM4P190CA0012.EURP190.PROD.OUTLOOK.COM (2603:10a6:200:56::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.2856.20 via Frontend Transport; Wed, 1 Apr 2020 15:01:23 +0000 X-Mailer: git-send-email 2.21.0 X-Originating-IP: [185.215.60.23] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 09f6e57b-7ae4-4849-c57f-08d7d64d8bb4 X-MS-TrafficTypeDiagnostic: AM7PR08MB5494: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:595; X-Forefront-PRVS: 03607C04F0 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:AM7PR08MB5494.eurprd08.prod.outlook.com; PTR:; CAT:NONE; SFTY:; SFS:(10019020)(4636009)(376002)(136003)(346002)(396003)(39840400004)(366004)(66946007)(66556008)(52116002)(6486002)(86362001)(186003)(107886003)(478600001)(6506007)(4326008)(2906002)(6916009)(16526019)(26005)(5660300002)(6666004)(316002)(966005)(66476007)(1076003)(81166006)(36756003)(2616005)(81156014)(8676002)(8936002)(956004)(6512007); DIR:OUT; SFP:1102; Received-SPF: None (protection.outlook.com: virtuozzo.com does not designate permitted sender hosts) X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: YOya9huRcSsCNCFkGq6xOdXQxoj8DeoyEsrMytCX0QfQpfzeSnA0HVDk/4JPScwQlur+ypNGhHK3rs359xmF0kQQfm5fnH1R4FTE1dDePWVkucI0XcmbILy7NFBoD+LVw4cmzDM4oD4rbXc8Bup2aw== X-OriginatorOrg: virtuozzo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 09f6e57b-7ae4-4849-c57f-08d7d64d8bb4 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Apr 2020 15:01:24.2802 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 0bc7f26d-0264-416e-a6fc-8352af79c58f X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: ulu6QKwOIOZxO3i0jNqQrL2eFZrJHDQrP+UdJedziVF55kEI9QxZBg10G1nHCtIcmfu0YAdiZaPat1cqJC5cimC948jjuQH3ZkpeMmCMZlY= X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR08MB5494 X-detected-operating-system: by eggs.gnu.org: Windows NT kernel [generic] [fuzzy] X-Received-From: 40.107.1.96 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, qemu-devel@nongnu.org, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Recent changes in NBD protocol allowed to use some commands without max_block restriction. Let's drop the restrictions. NBD change is here: https://github.com/NetworkBlockDevice/nbd/commit/9f30fedb8699f151e7ef4ccc07= e624330be3316b#diff-762fb7c670348da69cc9050ef58fe3ae v2: 01: add Eric's r-b 02: keep INT_MAX limit for discard 03: s/max_pwrite_zeroes_no_fallback/max_pwrite_zeroes_fast/ (a bit shorter, so that if condition fit in one line) default is changed to be max_pwrite_zeroes, so blkdebug is unchanged and we need one more patch: 04 refactor max_write_zeroes calculation in bdrv_co_do_pwrite_zeroes, prepare to last patch 04: new, actual change for nbd driver 05: reword commit message (fix -> refactoring) as I don't see bugs here. Ke= ep an r-b 06: rewording, grammar [Eric] rebase on 03 changes Vladimir Sementsov-Ogievskiy (6): block/nbd-client: drop max_block restriction from block_status block/nbd-client: drop max_block restriction from discard block: add max_pwrite_zeroes_fast to BlockLimits block/nbd: define new max_write_zero_fast limit block/io: refactor bdrv_co_do_pwrite_zeroes head calculation block/io: auto-no-fallback for write-zeroes include/block/block_int.h | 8 ++++++++ block/io.c | 39 +++++++++++++++++++++++++++++++++------ block/nbd.c | 7 +++---- 3 files changed, 44 insertions(+), 10 deletions(-) --=20 2.21.0