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    SubjectRe: [PATCH tip/core/rcu 01/15] rcu: Add PROVE_RCU_DELAY to provoke difficult races
    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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