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mm-add-comment-explaining-task-state-setting-in-bdi_forker_thread-fix

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Cc: Jan Kara <jack@suse.cz>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andrew Morton
2011-10-31 17:08:54 -07:00
committed by Linus Torvalds
parent 99ef0315f1
commit 20c8c62891
1 changed files with 2 additions and 3 deletions
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mm/backing-dev.c
+2 -3
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@@ -404,9 +404,8 @@ static int bdi_forker_thread(void *ptr)
/*
* 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.
* waking us up to do work for them. Set the task state here
* so that we don't miss wakeups after verifying conditions.
*/
set_current_state(TASK_INTERRUPTIBLE);