Messages in this thread | | | Date | Sun, 24 Jun 2012 01:48:30 +0800 | From | Fengguang Wu <> | Subject | Re: BUG: tracer_alloc_buffers returned with preemption imbalance |
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> > static inline int rcu_blocking_is_gp(void) > > { > > might_sleep(); /* Check for RCU read-side critical section. */ > > + preempt_disable(); > > return num_online_cpus() <= 1; > > + preempt_enable(); > > } > > Thank you! I have no idea how a preempt_disable() causes that badness > to happen, but this commit is not yet critically important, so I will > drop it.
preempt_enable() becomes dead code because of the return statement? I wonder why gcc didn't issue a warning (or I failed to catch it)...
Thanks, Fengguang
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