From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============7664486818903648612==" MIME-Version: 1.0 From: Walker, Benjamin Subject: Re: [SPDK] "Requested device XXX cannot be used" warning in device detach procedure may be misleading Date: Mon, 13 Mar 2017 16:10:54 +0000 Message-ID: <1489421452.12574.5.camel@intel.com> In-Reply-To: 8b74f6ae-5d34-3934-06d2-f30ed72159e4@gmail.com List-ID: To: spdk@lists.01.org --===============7664486818903648612== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Mon, 2017-03-13 at 12:28 +0800, Freeman Zhang wrote: > Hi > = > On 3/13/17 12:03 PM, Chang, Cunyin wrote: > > = > > Actually, the error message caused by the function > > spdk_pci_device_detach(), after we detach the device, we try to > > call the function > > rte_eal_pci_probe_one(), but we do not have callback function for > > the dpdk nvme driver at this point, so the error message show up,=C2=A0 > > but=C2=A0=C2=A0this function will add the device back to dpdk pci device > > list, then we could probe the device next time when > > we want to use it again. So it has no adverse effects but just one > > error message, but we still trying to fix it now. > > = > = > Thanks for your reply! > = > I've noticed it and that is why I think it's kind of misleading. So I > guess we should not focus only on reusing codes but also making it > clearer for both users and developers. The problem is that DPDK is not exposing a public API to do the operation we need to do (unload a driver but not remove it entirely from the list of PCI devices). We're working with the DPDK team to add a public API to do that while also investigating better ways to work around the issue that don't leave us with this confusing error message. > = > = > All the best! > Freeman > = > _______________________________________________ > SPDK mailing list > SPDK(a)lists.01.org > https://lists.01.org/mailman/listinfo/spdk --===============7664486818903648612== Content-Type: application/x-pkcs7-signature MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIKdTCCBOsw ggPToAMCAQICEFLpAsoR6ESdlGU4L6MaMLswDQYJKoZIhvcNAQEFBQAwbzELMAkGA1UEBhMCU0Ux FDASBgNVBAoTC0FkZFRydXN0IEFCMSYwJAYDVQQLEx1BZGRUcnVzdCBFeHRlcm5hbCBUVFAgTmV0 d29yazEiMCAGA1UEAxMZQWRkVHJ1c3QgRXh0ZXJuYWwgQ0EgUm9vdDAeFw0xMzAzMTkwMDAwMDBa Fw0yMDA1MzAxMDQ4MzhaMHkxCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJDQTEUMBIGA1UEBxMLU2Fu 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