From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maciej Rutecki Subject: Re: [3.4-rc1][Regression][network wireless] 'task xxxx blocked for more than 120 seconds' after resume Date: Thu, 5 Apr 2012 20:37:37 +0200 Message-ID: <201204052037.37497.maciej.rutecki@gmail.com> References: <201204022157.05598.maciej.rutecki@gmail.com> <1333440469.3574.0.camel@jlt3.sipsolutions.net> <20120405103254.GE2378@redhat.com> Reply-To: maciej.rutecki@gmail.com Mime-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Johannes Berg , Linux Kernel Mailing List , "Rafael J. Wysocki" , linux-wireless@vger.kernel.org, netdev To: Stanislaw Gruszka Return-path: In-Reply-To: <20120405103254.GE2378@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On czwartek, 5 kwietnia 2012 o 12:32:54 Stanislaw Gruszka wrote: > On Tue, Apr 03, 2012 at 10:07:49AM +0200, Johannes Berg wrote: > > -ilw > > +netdev > > > > I have no idea what this could be, but I'm almost certain it's not > > caused by our wireless driver. Looks more like rtl8169 is to blame. > > I'm not sure. Looks like there is deadlock or infinite loop in process > that holds rtnl lock. This can be wireless driver, wired driver or > generic network code bug. > > Maciej, please recompile with CONFIG_LOCKDEP and check if it will not > find any deadlock. If not, when problem will happen please do Did you mean "CONFIG_LOCKDEP_SUPPORT"? $ cat /boot/config-3.4.0-rc1 | grep CONFIG_LOCKDEP CONFIG_LOCKDEP_SUPPORT=y > > echo w > /proc/sysrq-trigger > dmesg -c > dmesg1.txt http://mrutecki.pl/download/kernel/3.4-rc1/netdev_resume/dmesg1.txt > echo t > /proc/sysrq-trigger > dmesg > dmesg2.txt http://mrutecki.pl/download/kernel/3.4-rc1/netdev_resume/dmesg2.txt > > and provide those files. > > Additionally there are also lot in dmesg: > > netlink: 140 bytes leftover after parsing attributes. > > This need to be investigated as well. Perhaps you could modify error > message, to show what netlink messages/attributes are processed. > > Thanks > Stanislaw BTW. From tomorrow till Tuesday I'll be on vacation, so until then I could respond to the e-mails. Regards -- Maciej Rutecki http://www.mrutecki.pl