Date: Fri, 28 Feb 2003 11:04:36 -0800 From: Lars Eggert <larse@ISI.EDU> To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-mobile@FreeBSD.ORG Subject: Re: wi polling Message-ID: <3E5FB2C4.1020300@isi.edu> In-Reply-To: <20030228.104434.70648014.imp@bsdimp.com> References: <20021022004219.V15421-100000@edge.foundation.invalid> <20021021.231314.36493344.imp@bsdimp.com> <3E5F9C5A.3000503@isi.edu> <20030228.104434.70648014.imp@bsdimp.com>
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This is a cryptographically signed message in MIME format. --------------ms090004080405040103030409 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit On 2/28/2003 9:44 AM, M. Warner Losh wrote: > In message: <3E5F9C5A.3000503@isi.edu> > Lars Eggert <larse@ISI.EDU> writes: > : that's too bad - our Soekris boxes livelock easily doing hostap > : processing. Is this something that cannot ever work (e.g. due to how > : hostap works, which I have only a foggy notion of)? > > I've only seen lockups with 'bad' firmware versions. There's nothing > inherent in hostap that would cause this. If there's a non-hardware > releated livelock, then the driver should be fixed. Sorry for being unclear: By "livelock" I mean the CPU spends all its cycles on receive and hostap processing, to a point where userland processes are starved. The box doesn't panic and becomes responsive again when network load goes down. Polling helps with this at L3, but I'm not sure if it'd do anything for hostap, since that seems to be an L2 thing. Lars -- Lars Eggert <larse@isi.edu> USC Information Sciences Institute --------------ms090004080405040103030409 Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIJtjCC AzgwggKhoAMCAQICEGZFcrfMdPXPY3ZFhNAukQEwDQYJKoZIhvcNAQEEBQAwgdExCzAJBgNV BAYTAlpBMRUwEwYDVQQIEwxXZXN0ZXJuIENhcGUxEjAQBgNVBAcTCUNhcGUgVG93bjEaMBgG A1UEChMRVGhhd3RlIENvbnN1bHRpbmcxKDAmBgNVBAsTH0NlcnRpZmljYXRpb24gU2Vydmlj ZXMgRGl2aXNpb24xJDAiBgNVBAMTG1RoYXd0ZSBQZXJzb25hbCBGcmVlbWFpbCBDQTErMCkG CSqGSIb3DQEJARYccGVyc29uYWwtZnJlZW1haWxAdGhhd3RlLmNvbTAeFw0wMDA4MzAwMDAw MDBaFw0wNDA4MjcyMzU5NTlaMIGSMQswCQYDVQQGEwJaQTEVMBMGA1UECBMMV2VzdGVybiBD YXBlMRIwEAYDVQQHEwlDYXBlIFRvd24xDzANBgNVBAoTBlRoYXd0ZTEdMBsGA1UECxMUQ2Vy dGlmaWNhdGUgU2VydmljZXMxKDAmBgNVBAMTH1BlcnNvbmFsIEZyZWVtYWlsIFJTQSAyMDAw 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