From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: bufferbloat on Nokia N900 (and probably anything with GPRS?) Date: Thu, 4 Aug 2016 20:52:25 +0200 Message-ID: <20160804185225.GA12637@amd> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: netdev@vger.kernel.org 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 Return-path: Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.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