From d79fc0fc6645b0cf5cd980da76942ca6d6300fa4 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sat, 10 Sep 2005 00:26:12 -0700 Subject: [PATCH] sched: TASK_NONINTERACTIVE This patch implements a task state bit (TASK_NONINTERACTIVE), which can be used by blocking points to mark the task's wait as "non-interactive". This does not mean the task will be considered a CPU-hog - the wait will simply not have an effect on the waiting task's priority - positive or negative alike. Right now only pipe_wait() will make use of it, because it's a common source of not-so-interactive waits (kernel compilation jobs, etc.). Signed-off-by: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/pipe.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'fs/pipe.c') diff --git a/fs/pipe.c b/fs/pipe.c index 2c7a23dde2d..66aa0b938d6 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -39,7 +39,11 @@ void pipe_wait(struct inode * inode) { DEFINE_WAIT(wait); - prepare_to_wait(PIPE_WAIT(*inode), &wait, TASK_INTERRUPTIBLE); + /* + * Pipes are system-local resources, so sleeping on them + * is considered a noninteractive wait: + */ + prepare_to_wait(PIPE_WAIT(*inode), &wait, TASK_INTERRUPTIBLE|TASK_NONINTERACTIVE); up(PIPE_SEM(*inode)); schedule(); finish_wait(PIPE_WAIT(*inode), &wait); -- cgit v1.2.3