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Commit 09f40f98 authored by Jan Kara's avatar Jan Kara Committed by Jens Axboe
Browse files

mm: Add comment explaining task state setting in bdi_forker_thread() 



CC: Wu Fengguang <fengguang.wu@intel.com>
CC: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarJens Axboe <jaxboe@fusionio.com>
parent 5a042aa4

mm/backing-dev.c

+7 −0
Original line number Diff line number Diff line
@@ -401,6 +401,13 @@ static int bdi_forker_thread(void *ptr) 
		}



		spin_lock_bh(&bdi_lock);

		/*

		 * In the following loop we are going to check whether we have

		 * some work to do without any synchronization with tasks

		 * waking us up to do work for them. So we have to set task

		 * state already here so that we don't miss wakeups coming

		 * after we verify some condition.

		 */

		set_current_state(TASK_INTERRUPTIBLE);



		list_for_each_entry(bdi, &bdi_list, bdi_list) {