From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cong Wang Subject: Re: [BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few KB/s Date: Tue, 12 Nov 2013 06:48:59 +0000 (UTC) Message-ID: References: <8761s0cqhh.fsf@natisbad.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, stable@vger.kernel.org To: linux-arm-kernel@lists.infradead.org Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org List-Id: netdev.vger.kernel.org On Sun, 10 Nov 2013 at 13:53 GMT, Arnaud Ebalard wrote: > Hi, > > I decided to upgrade the kernel on one of my ReadyNAS 102 from 3.11.1 to > 3.11.7. The device is based on Marvell Armada 370 SoC and uses mvneta > driver. Mine runs Debian armel unstable but I can confirm the issue also > happens on a debian harmhf unstable. > [...] > > Then, knowing that, I started a git bisect session on stable tree to end > up with the following suspects. I failed to go any further to a single > commit, due to crashes, but I could recompile a kernel w/ debug info and > report what I get if neeeded. > > commit dc0791aee672 tcp: do not forget FIN in tcp_shifted_skb() [bad] > commit 18ddf5127c9f tcp: must unclone packets before mangling them > commit 80bd5d8968d8 tcp: TSQ can use a dynamic limit > commit dbeb18b22197 tcp: TSO packets automatic sizing > commit 50704410d014 Linux 3.11.6 [good] > This regression is probably introduced the last TSQ commit, Eric has a patch for mvneta in the other thread: http://article.gmane.org/gmane.linux.network/290359