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@xxxxxx> 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?