From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next 02/17] tcp: don't backtrack to sacked skbs Date: Mon, 02 Mar 2009 03:01:03 -0800 (PST) Message-ID: <20090302.030103.89533524.davem@davemloft.net> References: <12358322821815-git-send-email-ilpo.jarvinen@helsinki.fi> <12358322821434-git-send-email-ilpo.jarvinen@helsinki.fi> <1235832282317-git-send-email-ilpo.jarvinen@helsinki.fi> Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: netdev@vger.kernel.org To: ilpo.jarvinen@helsinki.fi Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:46950 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753724AbZCBLBV convert rfc822-to-8bit (ORCPT ); Mon, 2 Mar 2009 06:01:21 -0500 In-Reply-To: <1235832282317-git-send-email-ilpo.jarvinen@helsinki.fi> Sender: netdev-owner@vger.kernel.org List-ID: =46rom: "Ilpo J=E4rvinen" Date: Sat, 28 Feb 2009 16:44:27 +0200 > From: Ilpo J=E4rvinen >=20 > Backtracking to sacked skbs is a horrible performance killer > since the hint cannot be advanced successfully past them... > ...And it's totally unnecessary too. >=20 > In theory this is 2.6.27..28 regression but I doubt anybody > can make .28 to have worse performance because of other TCP > improvements. >=20 > Signed-off-by: Ilpo J=E4rvinen Applied.