From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934157AbcHDSwb (ORCPT ); Thu, 4 Aug 2016 14:52:31 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:55116 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934089AbcHDSw3 (ORCPT ); Thu, 4 Aug 2016 14:52:29 -0400 Date: Thu, 4 Aug 2016 20:52:25 +0200 From: Pavel Machek To: pali.rohar@gmail.com, sre@kernel.org, kernel list , aaro.koskinen@iki.fi, ivo.g.dimitrov.75@gmail.com, patrikbachan@gmail.com, serge@hallyn.com Cc: netdev@vger.kernel.org Subject: bufferbloat on Nokia N900 (and probably anything with GPRS?) Message-ID: <20160804185225.GA12637@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi! GPRS/UMTS modem on N900 seems to have rather severe bufferbloat problem -- after area of bad signal is encountered, pings are in 200 _seconds_ range. I guess it would be good to reduce the queues, and probably drop packets when signal is too low. Any ideas how to make GPRS more usable? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html