On Fri, 2007-08-03 at 11:44 -0700, Paul E. McKenney wrote:
> The rcutorture module uses a random-number generator that periodically
> calls get_random_bytes() to add entropy. This random-number generator
> is invoked from within the RCU read-side critical section, which, in the
> case of the synchronize_sched() variant of RCU, has preeemption disabled.
> Unfortunately, get_random_bytes() ends up acquiring normal spinlocks,
> which can block in -rt, resulting in very large numbers of "scheduling
> while atomic" messages.
>
> This patch takes a very crude approach, simply substituting the time
> of day for get_random_bytes().
>
> Signed-off-by: Paul E. McKenney <[email protected]>
Acked-by: Josh Triplett <[email protected]>
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