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Sun, 7 Oct 2018 11:00:38 +0000 From: Shahaf Shuler To: Yongseok Koh CC: "dev@dpdk.org" , "stable@dpdk.org" , "Damjan Marion (damarion)" , Ed Warnicke Thread-Topic: [PATCH 1/2] net/mlx4: support externally allocated static memory Thread-Index: AQHUVDWLTrt6OxE+vkuvEQYOIIlmxqUTsWWA Date: Sun, 7 Oct 2018 11:00:38 +0000 Message-ID: References: <20180924183637.16423-1-yskoh@mellanox.com> In-Reply-To: <20180924183637.16423-1-yskoh@mellanox.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=shahafs@mellanox.com; x-originating-ip: [193.47.165.251] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; DB7PR05MB5525; 6:nf54d6dXUfnJrmM82u7OSF5nvdr0yI9OpigqxbOcQSY4BJpgNuckTvPOZssNL41s9TOFfWII8lnMLV5os/sA7vQ2A+L+4OpulwZBpyrWfPn9q1xYqjFQ4vNa9mslgdhK78zzPIghtumqKXC2pTKQdtDxiPLhg9sOEG7ZKRqpT+Shf9pHpPg2l0UsYoqAeTk1BXmoKxubvInfbhfW44yWvHyDGru9Ys+abdnDLrPhWpAxh9iThr+K/OQzScHPa1+xFb4/ZOrlOnb9b0tBTFODaZ8kGm3xP7LERowT9exORxRwr3DDM+ti8c+tpPOzs+RHhgBYOauupLb3ALfIV5htVNB5cmQyeGUEQ5OqP1lfVWOQrAzEjfWDiGEQhnbp5DKu3VzaTG5VkS1y/Ce1xu6s8ZNdkkN/nf1yGaGlkuksvn1pgtZqWdqcznmoItGG2V4kLOqm2rdiiBBpNPoSSD92zg==; 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DIR:OUT; SFP:1101; SCL:1; SRVR:DB7PR05MB5525; H:DB7PR05MB4426.eurprd05.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: mellanox.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: XfEZbylHyrxWYjTpRA7JaM53lbO2xVFWUbDyEJeaNTvNhaeZ/dadpgTH+wc6noDgD/dVC4ZS4jcaVfLTjb4Q7/krFRGMhqqd5tdGoWYhT2PZT8has4UE45supyabdsiZKj16TbdKj1G+jxJk+OZXoIFdoA1oFdBjqI9a9J9ud7ox2/ovPBIRH3T+6ASAir+SrKtRXB6nAsQvhJPp5yVZkFbMxcSdVpx3aBZKoc7GJ/CetY3Yj1JhHBs3TnUp1ckwziutC1f4bCrgFWP65weg9U2u4vKx1l9EBAxYF4wbAafgmab+NQ+O3s7+TCzAgEK2C4bc5OkoD3M8gRX2NiftXsXFOV0oT3S1Npglnk8f1Vo= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: c9cf2978-ef1e-47b1-09da-08d62c441dc2 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Oct 2018 11:00:38.6546 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR05MB5525 Subject: Re: [dpdk-dev] [PATCH 1/2] net/mlx4: support externally allocated static memory X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 Oct 2018 11:00:41 -0000 Monday, September 24, 2018 9:37 PM, Yongseok Koh: > Subject: [PATCH 1/2] net/mlx4: support externally allocated static memory >=20 > When MLX PMD registers memory for DMA, it accesses the global memseg > list of DPDK to maximize the range of registration so that LKey search ca= n be > more efficient. Granularity of MR registration is per page. >=20 > Externally allocated memory shouldn't be used for DMA because it can't be > searched in the memseg list and free event can't be tracked by DPDK. If i= t is > used, the following error will occur: >=20 > net_mlx5: port 0 unable to find virtually contiguous chunk for > address (0x5600017587c0). rte_memseg_contig_walk() failed. >=20 > There's a pending patchset [1] which enables externally allocated memory. > Once it is merged, users can register their own memory out of EAL then th= at > will resolve this issue. >=20 > Meanwhile, if the external memory is static (allocated on startup and nev= er > freed), such memory can also be registered by little tweak in the code. >=20 > [1] http://patches.dpdk.org/project/dpdk/list/?series=3D1415 >=20 > This patch is not a bug fix but needs to be included in stable versions. >=20 > Fixes: 9797bfcce1c9 ("net/mlx4: add new memory region support") > Cc: stable@dpdk.org > Cc: "Damjan Marion (damarion)" > Cc: Ed Warnicke >=20 > Signed-off-by: Yongseok Koh > --- Series applied to next-net-mlx, thanks.=20