writeback: track if we're sleeping on progress in balance_dirty_pages()

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Note in the bdi_writeback structure whenever a task ends up sleeping
waiting for progress. We can use that information in the lower layers
to increase the priority of writes.

Signed-off-by: Jens Axboe <axboe@fb.com>
Reviewed-by: Jan Kara <jack@suse.cz>

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Jens Axboe 2016-09-01 10:20:33 -06:00

parent 8e1de26cd5

commit b57d74aff9

3 changed files with 4 additions and 0 deletions

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include/linux/backing-dev-defs.h

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