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rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [RFC] EAL: legacy memory fixed address translations To: Stephen Hemminger <stephen@networkplumber.org> Cc: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>, "dev@dpdk.org" <dev@dpdk.org> References: <256b5409-ddaf-d7cc-00c1-273ca76dbf71@xsightlabs.com> <6aaa04d8-2ac5-ced6-ec25-d42bc52a3e2f@xsightlabs.com> <20220726225910.26159820@sovereign> <e426c21b-0235-11a7-7039-0c55dcc15cde@xsightlabs.com> <20220727121024.29829f3e@hermes.local> From: Don Wallwork <donw@xsightlabs.com> In-Reply-To: <20220727121024.29829f3e@hermes.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: ZR0P278CA0053.CHEP278.PROD.OUTLOOK.COM (2603:10a6:910:1d::22) To DB9P193MB1482.EURP193.PROD.OUTLOOK.COM (2603:10a6:10:2a6::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: f9c5e2df-e127-4ca3-9c53-08da700600f9 X-MS-TrafficTypeDiagnostic: AM9P193MB1810:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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As you say, there is >> already an efficient VA to PA mechanism in place for those. > > If the only user of this would be your out of tree code, > then it would never get tested by normal process. > Therefore it would be regularly broken by other changes. While we're not yet ready to upstream our drivers, we are actively working to get our code ready for that. It is expected that other devices may be able to take advantage of this capability. In the meantime, tests could be added to prevent such breakage.