On Wed, Sep 20, 2017 at 09:32:59AM -0600, Jens Axboe wrote:

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. This changes the writeback to not be range cyclic,
but that should not matter for laptop mode flush-all
semantics.

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>

While we're at sorting out the laptop_mode_wb_timer mess:
can we move initializing and deleting it from the block code
to the backing-dev code given that it now doesn't assume anything
about block devices any more?

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