fc9a6e22b parent c5f7ad233b8805dae06e694538d8095b19f3c560 author Artem Bityutskiy 1280057354 +0300 committer Jens Axboe 1281200035 +0200 writeback: do not lose wake-ups in the forker thread - 2 Currently, if someone submits jobs for the default bdi, we can lose wake-up events. E.g., this can happen if 'bdi_queue_work()' is called when 'bdi_forker_thread()' is executing code after 'wb_do_writeback(me, 0)', but before 'set_current_state(TASK_INTERRUPTIBLE)'. This situation is unlikely, and the result is not very severe - we'll just delay the execution of the work, but this is still not very nice. This patch fixes the issue by checking whether the default bdi has works before the forker thread goes sleep. Signed-off-by: Artem Bityutskiy Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe ÄòEt•Ox