Return-path: Received: from xc.sipsolutions.net ([83.246.72.84]:54927 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755865AbYF3LJz (ORCPT ); Mon, 30 Jun 2008 07:09:55 -0400 Subject: Re: compat-wireless high packet loss. From: Johannes Berg To: Guy Cohen Cc: Tomas Winkler , David Miller , "John W. Linville" , "Luis R. Rodriguez" , Linux Wireless , Emmanuel Grumbach , Patrick McHardy In-Reply-To: <247d6d340806282323v3192ead8v149359e482375991@mail.gmail.com> (sfid-20080629_082355_009658_4E662435) References: <1ba2fa240806261603g30c3e757y9166c2f9e05f7666@mail.gmail.com> <247d6d340806282323v3192ead8v149359e482375991@mail.gmail.com> (sfid-20080629_082355_009658_4E662435) Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-d28OrUwL7NdCqCrsbT2/" Date: Mon, 30 Jun 2008 13:09:09 +0200 Message-Id: <1214824149.5507.36.camel@johannes.berg> (sfid-20080630_130959_317441_6930A2C3) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-d28OrUwL7NdCqCrsbT2/ Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Sun, 2008-06-29 at 09:23 +0300, Guy Cohen wrote: > More info on the issue.. The problem is with TX of unrestrained UDP > stream, when the traffic generated at the application layer is larger > than the link can pass. With kernel 2.6.26-* the traffic is restrained > when the TX FIFOs gets full while in 2.6.25.* frames are dropped at > some layer. It seems that the drop happens after the IP fragmentation > step at the stack. does compat use multiqueue now? if not, look in the mac80211 fake mq code. johannes --=-d28OrUwL7NdCqCrsbT2/ Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIcBAABAgAGBQJIaL7SAAoJEKVg1VMiehFYBTEP/il6uOq0lb5S8y09nCYqdK5d qfenCdlYS/Z/km2JkYxfLLB33MCvwyMDeAe3YuGlYH4zfrPsUPdgXENrYhiCBicl TyvAWgODdtDR7kvt3Pd3tdgifyZOBh8A7zxCQ5/KwnjEMWeHLfUssPAuBTcT0/xy 1TPaz5LqZ2/s0G1x3qfCdQKU3uu6R7nxz8hQdnPANujckBYEcCFG0edwVZskfho3 8NDyiJPleKGG3F0mQblG6QmSazW1dTvIkTv3ADYf6bikpqtX68zbyy4xUfWgJWZI BEA/U7Dbk+dIwnL6HZKgI0WPw8eXXkfnAS0DLBiv5gXw0hIkrfylERzEwIs+2bNc Q9HLcoPTTIJCE5Y8hlYr2d3ed27yBIBOvp1UhKmDFyJ2F+DfBAUsuYf0WYK1HJSN THDHubEq5znqYrlqCb/fpCR/ZAlSmkqsGqe5QU6EGzZ4pQoWRIn6Kd+OJdGlv21p seKVpx5kC0EjJVaraqdfRYobjF7ktGkXXtSg8gfi602KwhQTjf9Z5bo5MnJBgvMF 3ABrK6qbSoeR6m6UxMzj/K/yHrUQeIk3gXAebwuISxZLhjnjDq2nduU0UjKwqTmF +mFgwMY7LuNf6N+BdH0GXOKeSB1oVNzsUqJSNVcRVFy16UW2QVbgsGKx64AqhWQd pc5uDFXo/O7CQY7KshFO =4HWO -----END PGP SIGNATURE----- --=-d28OrUwL7NdCqCrsbT2/--