From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from xc.sipsolutions.net ([83.246.72.84]:50951 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753724AbYEHWa7 (ORCPT ); Thu, 8 May 2008 18:30:59 -0400 Subject: Re: iwlwifi and tx info in skb->cb From: Johannes Berg To: Tomas Winkler Cc: Ron Rindjunsky , linux-wireless In-Reply-To: <1ba2fa240805081528t45d7810cjfd553bf99daff096@mail.gmail.com> (sfid-20080509_002739_976063_3ACD48DC) References: <1210197711.3547.1.camel@johannes.berg> <1ba2fa240805071629i6c7336f6y61a7c9690820ef5e@mail.gmail.com> <1210203054.3547.12.camel@johannes.berg> <1ba2fa240805071721i3d1e3258s1e8c024c4cae9239@mail.gmail.com> <1210255522.3547.48.camel@johannes.berg> <1ba2fa240805081507j7cf991ffo5bae443b0b77a39e@mail.gmail.com> <1210284656.3547.76.camel@johannes.berg> <1ba2fa240805081528t45d7810cjfd553bf99daff096@mail.gmail.com> (sfid-20080509_002739_976063_3ACD48DC) Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-OCejvnOtlKKnwM9B5/DO" Date: Fri, 09 May 2008 00:30:45 +0200 Message-Id: <1210285845.3547.81.camel@johannes.berg> (sfid-20080509_002955_461830_0C87B015) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-OCejvnOtlKKnwM9B5/DO Content-Type: text/plain Content-Transfer-Encoding: quoted-printable > I've just scanned the thread that was explaining why is this necessary > I will read it more carefully... I have just feeling that all this > wlan stuff just fits very awkwardly into current networking stack. That's not really related to wireless at all, if you want to do zero-copy IO then you need to checksum when the stuff hits the wire which means out of hardware buffers, which some hardware (including 802.11) doesn't support so you need to copy, nothing wireless specific here :) Anyway, with the changes davem and I are making to actually save the *extra* copy we should be doing well. That's where you want to look for improvements. johannes --=-OCejvnOtlKKnwM9B5/DO Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIVAwUASCN/FKVg1VMiehFYAQKWwA//cRSAMmSpGf0i8u/WPses10DDpr5TOiN3 tOVmNjd/A7SZf6Fcz2x7CMQY0LEZf1c/LTluVyOmk1rUX6S5V3YA0fUAbgA6ZIBC 70PQedV3eBIrIb2SsvR4PQVtVWpBC3dRF7rpgO5hlopkYTwRfrytMFdE/jmTqeoI koLh4qsaXJ5DQU/fZfd/RDP8GwgQiQtgunHF57cNj5afb/kKgZGsWiDOnm9ZEjXk hoP/MvfnA92kzlMs8GrBuMJgfaV3QriCOMziqGqbEurPypV8g6tFfLnqPMGiUJsr 5M69EEFH31jWVhmRLWczWTzOSLWXjtZDr2sQf9xoBsDp7etZiuj8YYg0TIDN/ZnE 4u3v/mei1W+vrMvhX8TAwesBWCeLG37+OMBEzWLDgcVOV2r1R0BWmFbxj6XezHBx JmDgS+sBIMFH5BLVdPjKuDw8Q+DfdlAOBmmydIv0M4xkCGXKTxskCLH+7mPsTEhE DMJvmxxmmKxv4MAPIALbyy5ANyk0AcwKmp4bKeIaWCOjb/Ajbqmu5I1KVaovD3K0 vPX63bgS3L0FItZr7bnoSHyo3IxZgNxWta3ep6EtV/hi098aPi4SBFQ/TBJ/F6sc m4C/M7uMEQtSRhNqV8iOsdZ9ntkMMmKY82JjbDrqeZyFkP/kxh9WvcNCvzwCB3Ie dMj+uuLWSvU= =gr+2 -----END PGP SIGNATURE----- --=-OCejvnOtlKKnwM9B5/DO--