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Tue, 15 Sep 2020 08:42:54 +0000 From: Johannes Thumshirn To: Qu Wenruo , "linux-btrfs@vger.kernel.org" Subject: Re: [PATCH v2 07/19] btrfs: update num_extent_pages() to support subpage sized extent buffer Thread-Topic: [PATCH v2 07/19] btrfs: update num_extent_pages() to support subpage sized extent buffer Thread-Index: AQHWiyIdMcWiFckg70uvUuaCRMWL1g== Date: Tue, 15 Sep 2020 08:42:54 +0000 Message-ID: References: <20200915053532.63279-1-wqu@suse.com> <20200915053532.63279-8-wqu@suse.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: suse.com; dkim=none (message not signed) header.d=none;suse.com; dmarc=none action=none header.from=wdc.com; x-originating-ip: [2001:a62:1460:3d01:38cf:f1ce:e1ec:d261] x-ms-publictraffictype: Email x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: 0da4301c-6dc0-4947-b75d-08d8595356cb x-ms-traffictypediagnostic: DM6PR04MB6459: x-microsoft-antispam-prvs: wdcipoutbound: EOP-TRUE x-ms-oob-tlc-oobclassifiers: OLM:3968; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM5PR0401MB3591.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0da4301c-6dc0-4947-b75d-08d8595356cb X-MS-Exchange-CrossTenant-originalarrivaltime: 15 Sep 2020 08:42:54.5204 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: FA9RsF0kyj6QhTIPW43tk3E6nxzJpAxhNAyB0iJb/kGkHJFUivKQkjnMC65AXbHj/aNnBvE2fHw0LmVFhBJC5axtALMtsGUkoVgIzj3mVVs= X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR04MB6459 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On 15/09/2020 07:36, Qu Wenruo wrote:=0A= > + * For sectorsize < PAGE_SIZE case, we only want to support 64K=0A= > + * PAGE_SIZE, and ensured all tree blocks won't cross page boundary.=0A= > + * So in that case we always got 1 page.=0A= =0A= Just to clarify, does this mean we won't support 512B sector size with 4K p= ages?=0A=