Re: [PATCH tip/core/rcu 01/15] rcu: Add PROVE_RCU_DELAY to provokedifficult races

[Paul E. McKenney]

On Thu, Sep 06, 2012 at 04:38:32PM +0200, Peter Zijlstra wrote:
> On Thu, 2012-08-30 at 11:56 -0700, Paul E. McKenney wrote:
> > +#ifdef CONFIG_PROVE_RCU_DELAY
> > +               udelay(10); /* Make preemption more probable. */
> 		cond_resched(); /* for extra fun? */

The additional fun could include "scheduling while atomic", so I will
pass.  ;-)

(The problem is that __rcu_read_unlock() can be called with interrupts
disabled, among other things.)

							Thanx, Paul

> > +#endif /* #ifdef CONFIG_PROVE_RCU_DELAY */ 
> 
> 

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