------- Comment From ddstr...@us.ibm.com 2014-09-19 17:10 EDT------- (In reply to comment #9) > So in my last run I recreated similar scenario with xmon=on and found that > the traces are triggered when I suspend and resume my guest when test were > running and not because of my actual test. > > --- Actual steps to reproduce -- > - enable xmon in /etc/default/grub and run 'update-grub' and 'reboot' > - Run ltpstress test > - suspend the guest 'virsh suspend <guest>' > - after few seconds resume. my test running fine > - dmesg showed the original traces messages as below
This is normal for powerpc, currently. In the watchdog: /* * If a virtual machine is stopped by the host it can look to * the watchdog like a soft lockup, check to see if the host * stopped the vm before we issue the warning */ if (kvm_check_and_clear_guest_paused()) return HRTIMER_RESTART; The generic function requires arch support: /* * This function is used by architectures that support kvm to avoid issuing * false soft lockup messages. */ static inline bool kvm_check_and_clear_guest_paused(void) { return false; } But powerpc doesn't currently implement that check: static inline bool kvm_check_and_clear_guest_paused(void) { return false; } You can safely ignore all those soft lockup messages, if they occur when your guest is suspended. As that appears to be the case in this bug, I'm rejecting it. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1370421 Title: BUG: soft lockup - CPU#15 stuck for 59737s! [genload:22734] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1370421/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs