Bug#656196: [2.6.39 -> 3.0 regression] kernel stalls every few days (rcu_sched_state detected stall on CPU x)

[Jonathan Nieder <jrnieder@gmail.com>]

Michael Below wrote:

> Before I go on to test other kernels, one other possibility has appeared
> to me: Maybe the 3.2 bug has been fixed through new CPU microcode? Is
> that likely? Some days after installing the 3.4 kernel I noticed a
> message about missing microcode and installed the relevant package. The
> CPU/BIOS has version 0x01000086, the new version is 0x010000db. Should I
> try if the error reappears when removing the microcode package?

If you have time, a quick check that you can still reproduce it,
keeping the microcode and without idle=mwait, would be nice.

Thanks,
Jonathan