[LTP] [PATCH v3] rcu/rcu_torture.sh: Rewrite test

[Petr Vorel]

Hi Xiao,

> Thanks for your detailed review.  Just one question:
> > Maybe print dmesg (for automated tests, when you don't have direct access to
> > machine).
> Do you have any simple way to only print related dmesg for the every run
> when running it in loops?
Maybe some -c or -C dmesg switch? (at least cgroup_regression_test.sh or
pm_sched_mc.py uses that).
But that's maybe too aggressive (removes dmesg for all previous tests).
So feel free to ignore this.

Kind regards,
Petr