Re: INFO: task journal:337 blocked for more than 120 seconds
On 10/2/2009 2:30 PM, Jeremy Fitzhardinge wrote: On 09/30/09 14:11, Shirley Ma wrote: Anybody found this problem before? I kept hitting this issue for 2.6.31 guest kernel even with a simple network test. INFO: task kjournal:337 blocked for more than 120 seconds. echo 0 /proc/sys/kernel/hung_task_timeout_sec disables this message. kjournald D 0041 0 337 2 0x My test is totally being blocked. I'm assuming from the lists you've posted to that this is under KVM? What disk drivers are you using (virtio or emulated)? Can you get a full stack backtrace of kjournald? Kevin Bowling submitted a RH bug against Xen with apparently the same symptoms (https://bugzilla.redhat.com/show_bug.cgi?id=526627). I'm wondering if there's a core kernel bug here, which is perhaps more easily triggered by the changed timing in a virtual machine. Thanks, J I've had a stable system thus far by appending clocksource=jiffies to the kernel boot line. The default clocksource is otherwise xen. The dmesg boot warnings in my bugzilla report still occur. Regards, Kevin Bowling http://www.analograils.com/ -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: INFO: task journal:337 blocked for more than 120 seconds
On 09/30/09 14:11, Shirley Ma wrote: Anybody found this problem before? I kept hitting this issue for 2.6.31 guest kernel even with a simple network test. INFO: task kjournal:337 blocked for more than 120 seconds. echo 0 /proc/sys/kernel/hung_task_timeout_sec disables this message. kjournald D 0041 0 337 2 0x My test is totally being blocked. I'm assuming from the lists you've posted to that this is under KVM? What disk drivers are you using (virtio or emulated)? Can you get a full stack backtrace of kjournald? Kevin Bowling submitted a RH bug against Xen with apparently the same symptoms (https://bugzilla.redhat.com/show_bug.cgi?id=526627). I'm wondering if there's a core kernel bug here, which is perhaps more easily triggered by the changed timing in a virtual machine. Thanks, J -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: INFO: task journal:337 blocked for more than 120 seconds
On 10/02/09 12:06, Shirley Ma wrote: On Fri, 2009-10-02 at 11:30 -0700, Jeremy Fitzhardinge wrote: I'm assuming from the lists you've posted to that this is under KVM? What disk drivers are you using (virtio or emulated)? Can you get a full stack backtrace of kjournald? Yes, it's under KVM, disk driver is virtio. Since the io has issue, the stack can't be saved on the disk. I have the image file attached here. Ah, thank you. The backtrace does indeed look very similar. (BTW, you could get a serial console with qemu-kvm -nographic -append console=ttyS0 ...) J -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: INFO: task journal:337 blocked for more than 120 seconds
On Wed, Sep 30, 2009 at 02:11:52PM -0700, Shirley Ma wrote: Hello all, Anybody found this problem before? I kept hitting this issue for 2.6.31 guest kernel even with a simple network test. INFO: task kjournal:337 blocked for more than 120 seconds. echo 0 /proc/sys/kernel/hung_task_timeout_sec disables this message. kjournald D 0041 0 337 2 0x My test is totally being blocked. I've hit this in the past with ext3, mounting with data=writeback made it disappear. -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: INFO: task journal:337 blocked for more than 120 seconds
On Thu, 2009-10-01 at 10:20 -0300, Marcelo Tosatti wrote: I've hit this in the past with ext3, mounting with data=writeback made it disappear. Thanks. I will make a try. Someone should fix this. Shirley -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
INFO: task journal:337 blocked for more than 120 seconds
Hello all, Anybody found this problem before? I kept hitting this issue for 2.6.31 guest kernel even with a simple network test. INFO: task kjournal:337 blocked for more than 120 seconds. echo 0 /proc/sys/kernel/hung_task_timeout_sec disables this message. kjournald D 0041 0 337 2 0x My test is totally being blocked. Thanks Shirley -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
