Messages in this thread |  | | Date | Thu, 23 Oct 2014 15:37:59 -0400 | From | Dave Jones <> | Subject | Re: rcu_preempt detected stalls. |
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On Thu, Oct 23, 2014 at 12:28:07PM -0700, Paul E. McKenney wrote:
> > > This one will require more looking. But did you do something like > > > create a pair of mutually recursive symlinks or something? ;-) > > > > I'm not 100% sure, but this may have been on a box that I was running > > tests on NFS. So maybe the server had disappeared with the mount > > still active.. > > > > Just a guess tbh. > > Another possibility might be that the box was so overloaded that tasks > were getting preempted for 21 seconds as a matter of course, and sometimes > within RCU read-side critical sections. Or did the box have ample idle > time?
I fairly recently upped the number of child processes I typically run with, so it being overloaded does sound highly likely.
Dave
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