On Tue, 16 Jan 2007 00:58:58 +0530
Dipankar Sarma <[email protected]> wrote:
> +/*
> + * Wait for CPUs to acknowledge the flip.
> + */
> +static int rcu_try_flip_waitack(int flipctr)
> +{
> + int cpu;
> +
> + for_each_possible_cpu(cpu)
> + if (per_cpu(rcu_flip_flag, cpu) != RCU_FLIP_SEEN)
> + return 1;
> +
> + /*
> + * Make sure our checks above don't bleed into subsequent
> + * waiting for the sum of the counters to reach zero.
> + */
> + smp_mb();
> + return 0;
> +}
Confused. If some of the possible cpus aren't online, doesn't the
state machine get stuck??
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