Bug 70211

Summary: Watchdog detected hard LOCKUP on cpu
Product: Platform Specific/Hardware Reporter: Jaime Pérez (19.jaime.91)
Component: x86-64Assignee: platform_x86_64 (platform_x86_64)
Status: RESOLVED CODE_FIX    
Severity: blocking CC: 19.jaime.91, alan, iordanov
Priority: P1    
Hardware: x86-64   
OS: Linux   
URL: https://launchpadlibrarian.net/164823785/bug1.txt
Kernel Version: All since 3.11 Subsystem:
Regression: No Bisected commit-id:

Description Jaime Pérez 2014-02-07 09:24:21 UTC 
We are getting that error when activating following config:

[doesn't work]
CONFIG_HZ=1000
CONFIG_HZ_1000=y
# CONFIG_HZ_250 is not set
CONFIG_IRQ_FORCED_THREADING_DEFAULT=y
CONFIG_PREEMPT=y
CONFIG_PREEMPT_RCU=y
# CONFIG_PREEMPT_VOLUNTARY is not set

[doesn't work]
CONFIG_HZ=1000
CONFIG_HZ_1000=y
# CONFIG_HZ_250 is not set
CONFIG_IRQ_FORCED_THREADING_DEFAULT=y
CONFIG_PREEMPT=n
CONFIG_PREEMPT_RCU=n
# CONFIG_PREEMPT_VOLUNTARY is not set

[doesn't work]
CONFIG_HZ=1000
CONFIG_HZ_1000=y
# CONFIG_HZ_250 is not set
CONFIG_IRQ_FORCED_THREADING_DEFAULT=n
CONFIG_PREEMPT=y
CONFIG_PREEMPT_RCU=y
# CONFIG_PREEMPT_VOLUNTARY is not set

[it works]
CONFIG_HZ=1000
CONFIG_HZ_1000=y
# CONFIG_HZ_250 is not set
CONFIG_IRQ_FORCED_THREADING_DEFAULT=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_RCU=n
# CONFIG_PREEMPT_VOLUNTARY is not set


[it works]
# CONFIG_HZ=1000
# CONFIG_HZ_1000=y
CONFIG_IRQ_FORCED_THREADING_DEFAULT=n
CONFIG_PREEMPT=n
CONFIG_PREEMPT_RCU=n
CONFIG_PREEMPT_VOLUNTARY=y


https://launchpadlibrarian.net/164823785/bug1.txt
Comment 1 Jaime Pérez 2014-02-07 10:33:56 UTC 
I have tried:

acpi=off [doesn't work]
idle=poll [doesn't work]
maxcpus=0 [doesn't work]
Comment 2 Alan 2014-02-07 11:35:14 UTC 
Please attach the error traces
Comment 3 Jaime Pérez 2014-02-07 12:01:49 UTC 
https://launchpadlibrarian.net/164823785/bug1.txt

here it is
Comment 4 Alan 2014-02-07 12:14:30 UTC 
vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF

Please verify you can duplicate this without vbox modules having been loaded
Comment 5 Jaime Pérez 2014-02-07 12:22:29 UTC 
# Virtual Box Drivers
blacklist vboxpci
blacklist vboxnetadp
blacklist vboxnetflt
blacklist vboxdrv

added to /etc/modprobe.d/blacklist.conf
Comment 7 Jaime Pérez 2014-02-07 13:04:14 UTC 
# Virtual Box Drivers
blacklist vboxpci
blacklist vboxnetadp
blacklist vboxnetflt
blacklist vboxdrv

added to /etc/modprobe.d/blacklist
Comment 8 Jaime Pérez 2014-02-07 13:04:51 UTC 
The log on comment 6 is the one got with comment 7 changes
Comment 9 Alan 2014-02-07 13:07:43 UTC 
Can you clarify whether this is the base mainline tree or the preemprt-RT tree (as I see -lowlatency in the name) ?
Comment 10 Jaime Pérez 2014-02-07 13:24:46 UTC 
I'm using ubuntu's source. The only diference between -generic and -lowlatency kernels are configuration, because they have the same source. So I suppose is mainline.
Comment 11 Jaime Pérez 2014-02-07 13:26:36 UTC 
Other person with i386 processor is geting the same error.
Comment 12 Jaime Pérez 2014-02-07 13:27:34 UTC 
*Another
Comment 13 Jaime Pérez 2014-02-10 16:57:58 UTC 
I'm running the kernel on Ubuntu 13.10 and it works properly. However dkms can't compile vbox drivers, so perhaps you were right when you said it was a virtualbox problem.
Comment 14 Jaime Pérez 2014-02-14 08:46:21 UTC 
In Ubuntu 13.10 I'm having blocks too with lowlatency kernel and adding nothreadingirqs. I have that this option made that every process can make the CPU stop doing what they were doing and take care of it. Then, it's some process blocking the CPU? How can I see which process it is?
Comment 15 Jaime Pérez 2014-02-24 22:07:13 UTC 
It seems that, with 3.14-RC4, the problem is solved. However, my HDMI audio stop working (Radeon HD7760)
Comment 16 Jaime Pérez 2014-03-09 10:19:34 UTC 
With

Linux jaime-MS-7640 3.13.0-16-lowlatency #36-Ubuntu SMP PREEMPT Tue Mar 4 23:32:09 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

the problem is solved, too.