From mboxrd@z Thu Jan 1 00:00:00 1970 From: alekcejk@googlemail.com Subject: Re: Re: limited network bandwidth with 3.2.x kernels Date: Tue, 21 Feb 2012 06:21:08 +0200 Message-ID: <5196304.nDv69tPK8W@localhost.localdomain> References: <8633039.fHPLx6GNq3@localhost.localdomain> <1329164293.2523.0.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit To: Eric Dumazet , netdev@vger.kernel.org Return-path: Received: from mail-bk0-f46.google.com ([209.85.214.46]:60007 "EHLO mail-bk0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750905Ab2BUEVu (ORCPT ); Mon, 20 Feb 2012 23:21:50 -0500 Received: by bkcjm19 with SMTP id jm19so5016842bkc.19 for ; Mon, 20 Feb 2012 20:21:49 -0800 (PST) In-Reply-To: <1329164293.2523.0.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: > > I noticed that with 3.2.x kernels download speed from some internet resources > > became about half of speed that was with previous kernels (3.1 and older). > > I tested Fedora 15 kernels 2.6.41.10 = 3.1.10 and 2.6.42.3 = 3.2.3 > > (many times rebooted for testing with first and second kernels). > > See bug https://bugzilla.redhat.com/show_bug.cgi?id=789659 Hi, I tested last released 3.2.7 kernel (2.6.42.7-1.fc15.i686). Speed problems in 3.2.7 the same as in 3.2.6. I also have Fedora Rawhide installed in virtual machine (e1000 driver used there) running on host with 3.1.10 kernel. And I noticed that after one of 3.3 rc's (or even rc's of 3.2) kernel updates download speed of updates from dl.fedoraproject.org in VM became extremely slow - about 160 kilobytes/sec instead of 1,2 megabytes/sec as it was before. But recently (somewhere between 3.3 rc3 and rc4) speed became again as it should 1,2 MB/s. Don't know is this problem related with speed in 3.2.x kernels and it is hard to debug this now. -- Alexey Kurov