Re: [PATCH RFC] mm: Implement balance_dirty_pages() through waiting for flusher thread

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On Thu, 2010-06-17 at 20:04 +0200, Jan Kara wrote:
> +                       /*
> +                        * Now we can wakeup the writer which frees wc entry
> +                        * The barrier is here so that woken task sees the
> +                        * modification of wc.
> +                        */
> +                       smp_wmb();
> +                       __wake_up_locked(&bdi->wb_written_wait, TASK_NORMAL); 

wakeups imply a wmb.
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