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Wed, 12 May 2021 12:23:06 +0000 From: "Marciniszyn, Mike" To: Leon Romanovsky , Doug Ledford , Jason Gunthorpe , "Dalessandro, Dennis" CC: Leon Romanovsky , "linux-kernel@vger.kernel.org" , "linux-rdma@vger.kernel.org" Subject: RE: [PATCH rdma-next] RDMA/rdmavt: Decouple QP and SGE lists allocations Thread-Topic: [PATCH rdma-next] RDMA/rdmavt: Decouple QP and SGE lists allocations Thread-Index: AQHXRlGKOHE6QFLZoEWMq90D8Um/darfxaGg Date: Wed, 12 May 2021 12:23:06 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: kernel.org; dkim=none (message not signed) header.d=none;kernel.org; dmarc=none action=none header.from=cornelisnetworks.com; x-originating-ip: [70.15.25.19] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: d192de3c-f95d-4635-92e5-08d91540b281 x-ms-traffictypediagnostic: BYAPR01MB4072: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:5797; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: cornelisnetworks.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BYAPR01MB3816.prod.exchangelabs.com X-MS-Exchange-CrossTenant-Network-Message-Id: d192de3c-f95d-4635-92e5-08d91540b281 X-MS-Exchange-CrossTenant-originalarrivaltime: 12 May 2021 12:23:06.3903 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4dbdb7da-74ee-4b45-8747-ef5ce5ebe68a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: hDOMa+oYVVsjUH8QnInqkfXGKrK6giJucsNmj/tHIyK3Y7DHFnG9Q/rrQmC8WDgQzV0c8hvyL1+vs2k/C3vkaFPRRyKaBMPXTRVw55h4YMPrwB0L7W0xA+HyFHXjtXZE X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR01MB4072 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > - struct rvt_sge r_sg_list[] /* verified SGEs */ > + struct rvt_sge *r_sg_list /* verified SGEs */ > ____cacheline_aligned_in_smp; > }; >=20 Since since has been made an independent allocation, r_sg_list becomes a re= ad-mostly pointer and should be moved up in rvt_qp to other 64 bit fields a= round timeout_jiffies. The cacheline can then be dropped for this field. Mike