I see that this bug has been expired, but thougt itmay be useful to add my own data.
I've started seeing the kernel message around November 2011. Not during boot, but at random times long after boot on different CPUs. The occurence is very rare, weeks apart, and it doesn't seem to affect anything I can see. Here are the 3 occurrences I've seen so far: Nov 23 18:05:10 xx kernel: [1114277.191313] INFO: rcu_sched_state detected stall on CPU 1 (t=15000 jiffies) Dec 1 06:05:20 xx kernel: [123499.144998] INFO: rcu_sched_state detected stall on CPU 3 (t=15000 jiffies) Feb 20 12:05:10 xx kernel: [214772.721417] INFO: rcu_sched_state detected stall on CPU 2 (t=15000 jiffies) So in my case, the stall affects different CPUs, lasts 15000 jiffies and happens many days after boot. Right now (Feb 20, 2012), I'm running Oneiric with all available updates applied. Kernel is: $ uname -a Linux xx 3.0.0-16-generic #29-Ubuntu SMP Tue Feb 14 12:48:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux CPUs are: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/822383 Title: Sometimes booting stops with "rcu_sched_state detected stall on CPU 0 (t=6000 jiffies)" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/822383/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
