writeback: pass in '0' for nr_pages writeback in laptop mode
Laptop mode really wants to writeback the number of dirty pages and inodes. Instead of calculating this in the caller, just pass in 0 and let wakeup_flusher_threads() handle it. Use the new wakeup_flusher_threads_bdi() instead of rolling our own. Acked-by: Johannes Weiner <hannes@cmpxchg.org> Tested-by: Chris Mason <clm@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk> Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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@ -1980,23 +1980,8 @@ int dirty_writeback_centisecs_handler(struct ctl_table *table, int write,
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void laptop_mode_timer_fn(unsigned long data)
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{
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struct request_queue *q = (struct request_queue *)data;
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int nr_pages = global_node_page_state(NR_FILE_DIRTY) +
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global_node_page_state(NR_UNSTABLE_NFS);
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struct bdi_writeback *wb;
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/*
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* We want to write everything out, not just down to the dirty
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* threshold
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*/
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if (!bdi_has_dirty_io(q->backing_dev_info))
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return;
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rcu_read_lock();
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list_for_each_entry_rcu(wb, &q->backing_dev_info->wb_list, bdi_node)
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if (wb_has_dirty_io(wb))
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wb_start_writeback(wb, nr_pages,
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WB_REASON_LAPTOP_TIMER);
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rcu_read_unlock();
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wakeup_flusher_threads_bdi(q->backing_dev_info, WB_REASON_LAPTOP_TIMER);
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}
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/*
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