From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Subject: Re: TCP stalls in current git, possibly splice related Date: Mon, 16 Jul 2007 14:02:47 +0200 Message-ID: <20070716120247.GG5195@kernel.dk> References: <1184320965.30334.2.camel@johannes.berg> <20070713110534.GF5328@kernel.dk> <1184575545.15112.0.camel@johannes.berg> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: James Morris , "David S. Miller" , netdev@vger.kernel.org To: Johannes Berg Return-path: Received: from brick.kernel.dk ([80.160.20.94]:22009 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754862AbXGPMDa (ORCPT ); Mon, 16 Jul 2007 08:03:30 -0400 Content-Disposition: inline In-Reply-To: <1184575545.15112.0.camel@johannes.berg> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Mon, Jul 16 2007, Johannes Berg wrote: > On Fri, 2007-07-13 at 13:05 +0200, Jens Axboe wrote: > > On Fri, Jul 13 2007, Johannes Berg wrote: > > > On Thu, 2007-07-12 at 16:12 -0400, James Morris wrote: > > > > I'm seeing TCP connection stalls with current git, and a bisect found the > > > > following as a possible cause: > > > > > > I'm also seeing stalls with synergy. > > > > Please try the below. > > I usually see stalls sending data from machine A to machine B. I just > upgraded machine B to commit 8d9107e8c50e1c4ff43c91c8841805833f3ecfb9 > (Fri Jul 13 16:53:18 2007 -0700) and the tree includes this patch. This > did not, however, fix the problem so I guess the problem is on the > sender side. Due to wireless-dev lagging behind I there still have > 2.6.22-something where this patch doesn't apply. I hope John will merge > again soon and then I'll report back whether I still see the stalling > behaviour with a current tree that includes this patch. Yep, it's a sender thing, so upgrading the receiver will not change anything. -- Jens Axboe