Return-Path: From: Marcel Holtmann To: mats.andersson@blue2net.com, BlueZ users In-Reply-To: <1186563840.4744.52.camel@Blue2net-mats.bellman.mea> References: <1186563840.4744.52.camel@Blue2net-mats.bellman.mea> Date: Sat, 11 Aug 2007 20:11:04 +0200 Message-Id: <1186855864.6698.24.camel@violet> Mime-Version: 1.0 Subject: Re: [Bluez-users] My netdev_watchdog barked once! Reply-To: BlueZ users List-Id: BlueZ users List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Sender: bluez-users-bounces@lists.sourceforge.net Errors-To: bluez-users-bounces@lists.sourceforge.net Hi Mats, > I had yesterday a surprising kernel message > > NETDEV WATCHDOG: bnep0: transmit timed out > > It occurred exactly once and then never more. > This happened on a FOXBoard with an Etrax100LX, > i.e. cris architecture, almost exactly twenty > four hours after the bnep link was initiated. > The kernel is 2.6.19, with bluez code seemingly > identical to the code in 2.6.18-mh8, but that > is beside my present point. > > My question: Is it more probable that it is the > usb driver that has a suboptimal timer use within > the kernel, or could it be that bnep/core.c or > bnep/netdev.c somehow should take timing of a > particular usb interface into account? The regular > kernel documentation mentions that the ethernet > driver e1000.ko can have a timer issue. That is how > I come to think along these lines. the 2.6.19 kernel is old. So I have no idea. In some cases disabling the SCO support of the hci_usb driver helps. Either via kernel option or loading it with isoc=0. Also BNEP is in general able to recover from wrong data packets so it might be simply something that can happen or a bug in the network stack that has already been fixed. Use a 2.6.22 or later kernel. Regards Marcel ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Bluez-users mailing list Bluez-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bluez-users