diff options
| author | Ingo Molnar <mingo@elte.hu> | 2003-05-18 20:46:29 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.transmeta.com> | 2003-05-18 20:46:29 -0700 |
| commit | 84205d0528f386e99ec00cd378acb3c4df010643 (patch) | |
| tree | 927badb4f771092255aeac16756264ae6e091631 /include/linux/wait.h | |
| parent | d1347e18678cee1ae7f84e71a12fcfc144402c20 (diff) | |
[PATCH] sync wakeup on UP
This fixes the scheduler's sync-wakeup code to be consistent on UP as
well.
Right now there's a behavioral difference between an UP kernel and an
SMP kernel running on a UP box: sync wakeups (which are only activated
on SMP) can cause a wakeup of a higher prio task, without preemption.
On UP kernels this does not happen. This difference in wakeup behavior
is bad.
This patch activates sync wakeups on UP as well - in the cases sync
wakeups are done the waker knows that it will schedule away soon, so
this 'delay preemption' decision is correct on UP as well.
Diffstat (limited to 'include/linux/wait.h')
| -rw-r--r-- | include/linux/wait.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/include/linux/wait.h b/include/linux/wait.h index f05754e8a3ca..c7aeb849f389 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -111,15 +111,12 @@ extern void FASTCALL(__wake_up_sync(wait_queue_head_t *q, unsigned int mode, int #define wake_up(x) __wake_up((x),TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 1) #define wake_up_nr(x, nr) __wake_up((x),TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, nr) #define wake_up_all(x) __wake_up((x),TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 0) +#define wake_up_all_sync(x) __wake_up_sync((x),TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 0) #define wake_up_interruptible(x) __wake_up((x),TASK_INTERRUPTIBLE, 1) #define wake_up_interruptible_nr(x, nr) __wake_up((x),TASK_INTERRUPTIBLE, nr) #define wake_up_interruptible_all(x) __wake_up((x),TASK_INTERRUPTIBLE, 0) #define wake_up_locked(x) __wake_up_locked((x), TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE) -#ifdef CONFIG_SMP #define wake_up_interruptible_sync(x) __wake_up_sync((x),TASK_INTERRUPTIBLE, 1) -#else -#define wake_up_interruptible_sync(x) __wake_up((x),TASK_INTERRUPTIBLE, 1) -#endif #define __wait_event(wq, condition) \ do { \ |