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43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: y2FweSrSmTAGEteeg0PCeGV7la14HH5hz8rms25Vojja8JCsoAbp7ZNFYuPk0ZPEHv+6sDcSZkAYz2to/Dl6Vg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR12MB1815 X-Headers-End: 1nfEr5-000AOo-TU Subject: Re: [f2fs-dev] [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Chaitanya Kulkarni via Linux-f2fs-devel Reply-To: Chaitanya Kulkarni Cc: "jfs-discussion@lists.sourceforge.net" , "linux-nvme@lists.infradead.org" , "virtualization@lists.linux-foundation.org" , "linux-mm@kvack.org" , "dm-devel@redhat.com" , "target-devel@vger.kernel.org" , "linux-mtd@lists.infradead.org" , "drbd-dev@lists.linbit.com" , "linux-s390@vger.kernel.org" , "linux-nilfs@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "cluster-devel@redhat.com" , "xen-devel@lists.xenproject.org" , "linux-ext4@vger.kernel.org" , "linux-um@lists.infradead.org" , "nbd@other.debian.org" , "linux-block@vger.kernel.org" , "linux-bcache@vger.kernel.org" , "ceph-devel@vger.kernel.org" , "linux-raid@vger.kernel.org" , "Martin K . Petersen" , "linux-mmc@vger.kernel.org" , "linux-f2fs-devel@lists.sourceforge.net" , "linux-xfs@vger.kernel.org" , "ocfs2-devel@oss.oracle.com" , "linux-fsdevel@vger.kernel.org" , "ntfs3@lists.linux.dev" , "linux-btrfs@vger.kernel.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On 4/14/22 21:52, Christoph Hellwig wrote: > For block devices, the SCSI target drivers implements UNMAP as calls to > blkdev_issue_discard, which does not guarantee zeroing just because > Write Zeroes is supported. > > Note that this does not affect the file backed path which uses > fallocate to punch holes. > > Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") > Signed-off-by: Christoph Hellwig > Reviewed-by: Martin K. Petersen Not a good assumption to have for sure. Looks good. 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Petersen" Subject: Re: [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction Thread-Topic: [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction Thread-Index: AQHYUITCWfO5Vbexo02RhnP7B3Qt7KzwdGUA Date: Fri, 15 Apr 2022 05:36:12 +0000 Message-ID: <673afa25-cf3f-616c-6bcd-16de35b307b2@nvidia.com> References: <20220415045258.199825-1-hch@lst.de> <20220415045258.199825-2-hch@lst.de> In-Reply-To: <20220415045258.199825-2-hch@lst.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 0c41c8b1-f98c-4a0c-d430-08da1ea1da48 x-ms-traffictypediagnostic: CY4PR12MB1815:EE_ x-microsoft-antispam-prvs: x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On 4/14/22 21:52, Christoph Hellwig wrote: > For block devices, the SCSI target drivers implements UNMAP as calls to > blkdev_issue_discard, which does not guarantee zeroing just because > Write Zeroes is supported. > > Note that this does not affect the file backed path which uses > fallocate to punch holes. > > Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") > Signed-off-by: Christoph Hellwig > Reviewed-by: Martin K. Petersen Not a good assumption to have for sure. Looks good. 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Fri, 15 Apr 2022 05:36:12 +0000 From: Chaitanya Kulkarni To: Christoph Hellwig , Jens Axboe Thread-Topic: [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction Thread-Index: AQHYUITCWfO5Vbexo02RhnP7B3Qt7KzwdGUA Date: Fri, 15 Apr 2022 05:36:12 +0000 Message-ID: <673afa25-cf3f-616c-6bcd-16de35b307b2@nvidia.com> References: <20220415045258.199825-1-hch@lst.de> <20220415045258.199825-2-hch@lst.de> In-Reply-To: <20220415045258.199825-2-hch@lst.de> Accept-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 0c41c8b1-f98c-4a0c-d430-08da1ea1da48 x-ms-traffictypediagnostic: CY4PR12MB1815:EE_ x-microsoft-antispam-prvs: x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0 x-microsoft-antispam-message-info: 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 x-forefront-antispam-report: CIP:255.255.255.255; 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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 2.84 on 10.11.54.2 X-Mailman-Approved-At: Tue, 19 Apr 2022 06:10:27 +0000 Subject: Re: [dm-devel] [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "jfs-discussion@lists.sourceforge.net" , "linux-nvme@lists.infradead.org" , "virtualization@lists.linux-foundation.org" , "linux-mm@kvack.org" , "dm-devel@redhat.com" , "target-devel@vger.kernel.org" , "linux-mtd@lists.infradead.org" , "drbd-dev@lists.linbit.com" , "linux-s390@vger.kernel.org" , "linux-nilfs@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "cluster-devel@redhat.com" , "xen-devel@lists.xenproject.org" , "linux-ext4@vger.kernel.org" , "linux-um@lists.infradead.org" , "nbd@other.debian.org" , "linux-block@vger.kernel.org" , "linux-bcache@vger.kernel.org" , "ceph-devel@vger.kernel.org" , "linux-raid@vger.kernel.org" , "Martin K . Petersen" , "linux-mmc@vger.kernel.org" , "linux-f2fs-devel@lists.sourceforge.net" , "linux-xfs@vger.kernel.org" , "ocfs2-devel@oss.oracle.com" , "linux-fsdevel@vger.kernel.org" , "ntfs3@lists.linux.dev" , "linux-btrfs@vger.kernel.org" Errors-To: dm-devel-bounces@redhat.com Sender: "dm-devel" X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 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-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On 4/14/22 21:52, Christoph Hellwig wrote: > For block devices, the SCSI target drivers implements UNMAP as calls to > blkdev_issue_discard, which does not guarantee zeroing just because > Write Zeroes is supported. > > Note that this does not affect the file backed path which uses > fallocate to punch holes. > > Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") > Signed-off-by: Christoph Hellwig > Reviewed-by: Martin K. Petersen Not a good assumption to have for sure. Looks good. Reviewed-by: Chaitanya Kulkarni -ck -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Chaitanya Kulkarni Subject: Re: [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction Date: Fri, 15 Apr 2022 05:36:12 +0000 Message-ID: <673afa25-cf3f-616c-6bcd-16de35b307b2@nvidia.com> References: <20220415045258.199825-1-hch@lst.de> <20220415045258.199825-2-hch@lst.de> In-Reply-To: <20220415045258.199825-2-hch@lst.de> Content-Language: en-US Content-ID: MIME-Version: 1.0 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-um" Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org To: Christoph Hellwig , Jens Axboe Cc: "dm-devel@redhat.com" , "linux-xfs@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-um@lists.infradead.org" , "linux-block@vger.kernel.org" , "drbd-dev@lists.linbit.com" , "nbd@other.debian.org" , "ceph-devel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , "xen-devel@lists.xenproject.org" , "linux-bcache@vger.kernel.org" , "linux-raid@vger.kernel.org" , "linux-mmc@vger.kernel.org" , "linux-mtd@lists.infradead.org" , "linux-nvme@lists.infradead.org" , "linux-s390@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "target-devel@vger.kernel.org" , "linux-btrfs@vger.kernel.org" , "linux-ext4@vger.kernel.org" , "linux-f2fs-devel@lists.sourceforge.net" , "cluster-devel@redhat.com" , "jfs-discussion@lists.sourceforge.net" , "linux-nilfs@vger.kernel.org" , "ntfs3@lists.linux.dev" , "ocfs2-devel@oss.oracle.com" , "linux-mm@kvack.org" , "Martin K . Petersen" On 4/14/22 21:52, Christoph Hellwig wrote: > For block devices, the SCSI target drivers implements UNMAP as calls to > blkdev_issue_discard, which does not guarantee zeroing just because > Write Zeroes is supported. > > Note that this does not affect the file backed path which uses > fallocate to punch holes. > > Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") > Signed-off-by: Christoph Hellwig > Reviewed-by: Martin K. Petersen Not a good assumption to have for sure. Looks good. Reviewed-by: Chaitanya Kulkarni -ck _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chaitanya Kulkarni Date: Fri, 15 Apr 2022 05:36:12 +0000 Subject: [Cluster-devel] [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction In-Reply-To: <20220415045258.199825-2-hch@lst.de> References: <20220415045258.199825-1-hch@lst.de> <20220415045258.199825-2-hch@lst.de> Message-ID: <673afa25-cf3f-616c-6bcd-16de35b307b2@nvidia.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On 4/14/22 21:52, Christoph Hellwig wrote: > For block devices, the SCSI target drivers implements UNMAP as calls to > blkdev_issue_discard, which does not guarantee zeroing just because > Write Zeroes is supported. > > Note that this does not affect the file backed path which uses > fallocate to punch holes. > > Fixes: 2237498f0b5c ("target/iblock: Convert WRITE_SAME to blkdev_issue_zeroout") > Signed-off-by: Christoph Hellwig > Reviewed-by: Martin K. Petersen Not a good assumption to have for sure. Looks good. Reviewed-by: Chaitanya Kulkarni -ck From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chaitanya Kulkarni Subject: Re: [PATCH 01/27] target: remove an incorrect unmap zeroes data deduction Date: Fri, 15 Apr 2022 05:36:12 +0000 Message-ID: <673afa25-cf3f-616c-6bcd-16de35b307b2@nvidia.com> References: <20220415045258.199825-1-hch@lst.de> <20220415045258.199825-2-hch@lst.de> Mime-Version: 1.0 Content-Transfer-Encoding: base64 Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=4IuTuVb/KyS1ZV0aqxRI/Yu1yD+ABTgelallVeHsTxk=; b=lx/vsdq1wuVjGXFb0RtlS8aNQVUdAwD32nu7CMFt+qyOZp4fU3BYd3nAfXUFYKskrRJfQL7Sgji53ElZm5sqH6S/Ro6ASYp2RNr5+WHyhQPl3V6ohDw/8K2T39LgGqYhL4BcILkZlIF3ghKn0878TKS0ZcvZmL9PLTjfMTSIQNzECGhofyqMeQ+XUOAPN0Q3qU8PzNiUwWiOS3ftFL8yvZ1G2R/FHpEDy1mrydwcAu2LEF+6QmWcTz3dW09SMVJheytf97BROBR4O2mgsLrGBQYZ8LvNMcZhgPtxqrDaz2MjJwXa5Np6BaGNWj9+2NWfTymrAIM8L/TicDPywpv7Gg== In-Reply-To: <20220415045258.199825-2-hch@lst.de> Content-Language: en-US Content-ID: List-ID: Content-Type: text/plain; charset="us-ascii" To: Christoph Hellwig , Jens Axboe Cc: "dm-devel@redhat.com" , "linux-xfs@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , "linux-um@lists.infradead.org" , "linux-block@vger.kernel.org" , "drbd-dev@lists.linbit.com" , "nbd@other.debian.org" , "ceph-devel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , "xen-devel@lists.xenproject.org" , "linux-bcache@vger.kernel.org" , "linux-raid@vger.kernel.org" , "linux-mmc@vger.kernel.org" T24gNC8xNC8yMiAyMTo1MiwgQ2hyaXN0b3BoIEhlbGx3aWcgd3JvdGU6DQo+IEZvciBibG9jayBk ZXZpY2VzLCB0aGUgU0NTSSB0YXJnZXQgZHJpdmVycyBpbXBsZW1lbnRzIFVOTUFQIGFzIGNhbGxz IHRvDQo+IGJsa2Rldl9pc3N1ZV9kaXNjYXJkLCB3aGljaCBkb2VzIG5vdCBndWFyYW50ZWUgemVy b2luZyBqdXN0IGJlY2F1c2UNCj4gV3JpdGUgWmVyb2VzIGlzIHN1cHBvcnRlZC4NCj4gDQo+IE5v dGUgdGhhdCB0aGlzIGRvZXMgbm90IGFmZmVjdCB0aGUgZmlsZSBiYWNrZWQgcGF0aCB3aGljaCB1 c2VzDQo+IGZhbGxvY2F0ZSB0byBwdW5jaCBob2xlcy4NCj4gDQo+IEZpeGVzOiAyMjM3NDk4ZjBi NWMgKCJ0YXJnZXQvaWJsb2NrOiBDb252ZXJ0IFdSSVRFX1NBTUUgdG8gYmxrZGV2X2lzc3VlX3pl cm9vdXQiKQ0KPiBTaWduZWQtb2ZmLWJ5OiBDaHJpc3RvcGggSGVsbHdpZyA8aGNoQGxzdC5kZT4N Cj4gUmV2aWV3ZWQtYnk6IE1hcnRpbiBLLiBQZXRlcnNlbiA8bWFydGluLnBldGVyc2VuQG9yYWNs ZS5jb20+DQoNCk5vdCBhIGdvb2QgYXNzdW1wdGlvbiB0byBoYXZlIGZvciBzdXJlLg0KDQpMb29r cyBnb29kLg0KDQpSZXZpZXdlZC1ieTogQ2hhaXRhbnlhIEt1bGthcm5pIDxrY2hAbnZpZGlhLmNv bT4NCg0KLWNrDQoNCg0K