Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 22 Oct 2002 15:29:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 22 Oct 2002 15:29:13 -0400 Received: from mtao-m02.ehs.aol.com ([64.12.52.8]:44010 "EHLO mtao-m02.ehs.aol.com") by vger.kernel.org with ESMTP id ; Tue, 22 Oct 2002 15:29:04 -0400 Date: Tue, 22 Oct 2002 12:35:11 -0700 From: John Gardiner Myers Subject: Re: epoll (was Re: [PATCH] async poll for 2.5) In-reply-to: To: linux-kernel , linux-aio Cc: Benjamin LaHaise Message-id: <3DB5A86F.3000802@netscape.com> MIME-version: 1.0 Content-type: multipart/signed; boundary=------------ms030508020101040706000701; micalg=sha1; protocol="application/x-pkcs7-signature" X-Accept-Language: en-us, en User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.2b) Gecko/20021016 References: <3DB0AD79.30401@netscape.com> <20021019065916.GB17553@mark.mielke.cc> <3DB19AE6.6020703@kegel.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6555 Lines: 109 This is a cryptographically signed message in MIME format. --------------ms030508020101040706000701 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Dan Kegel wrote: > The choice I see is between: > 1. re-arming the one-shot notification when the user gets EAGAIN > 2. re-arming the one-shot notification when the user reads all the data > that was waiting (such that the very next read would return EGAIN). > > #1 is what Davide wants; I think John and Mark are arguing for #2. No, this is not what I'm arguing. Once an event arrives for a fd, my proposed semantics are no different than Mr. Libenzi's. The only difference is what happens upon registration of interest for a fd. With my semantics, the kernel guarantees that if the fd is ready then at least one event has been generated. With Mr Libenzi's semantics, there is no such guarantee and the application is required to behave as if an event had been generated upon registration. --------------ms030508020101040706000701 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 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIK7TCC A4UwggLuoAMCAQICAlvfMA0GCSqGSIb3DQEBBAUAMIGTMQswCQYDVQQGEwJVUzELMAkGA1UE CBMCQ0ExFjAUBgNVBAcTDU1vdW50YWluIFZpZXcxGzAZBgNVBAoTEkFtZXJpY2EgT25saW5l IEluYzEZMBcGA1UECxMQQU9MIFRlY2hub2xvZ2llczEnMCUGA1UEAxMeSW50cmFuZXQgQ2Vy dGlmaWNhdGUgQXV0aG9yaXR5MB4XDTAyMDYwMTIwMjIyM1oXDTAyMTEyODIwMjIyM1owfTEL MAkGA1UEBhMCVVMxGzAZBgNVBAoTEkFtZXJpY2EgT25saW5lIEluYzEXMBUGCgmSJomT8ixk AQETB2pnbXllcnMxIzAhBgkqhkiG9w0BCQEWFGpnbXllcnNAbmV0c2NhcGUuY29tMRMwEQYD VQQDEwpKb2huIE15ZXJzMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDsB5tbTLWFycke 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