On 11/10/2013 08:18 PM, Nathan Lynch wrote:
> At this point I cannot trigger the issue without overwrite mode on
> 3.11.6, but on a 3.8-based vendor kernel I can recreate it regardless of
> the mode.
> 
> Is it possible that the lttng module code is messing up the current
> task's preempt count somehow?

Here's another manifestation of the issue -- when flood-pinging the
board during tracing, I get this warning from __do_softirq:

huh, entered softirq 3 NET_RX 804ae528 preempt_count 00000101, exited
with 00000102?



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