Add in an extra reschedule in an attempt to avoid getting reschedule the moment we've acquired the lock.
Signed-off-by: Peter Zijlstra <[email protected]> --- kernel/locking/mutex.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -468,6 +468,13 @@ __mutex_lock_common(struct mutex *lock, } osq_unlock(&lock->osq); slowpath: + /* + * If we fell out of the spin path because of need_resched(), + * reschedule now, before we try-lock the mutex. This avoids getting + * scheduled out right after we obtained the mutex. + */ + if (unlikely(need_resched())) + schedule_preempt_disabled(); #endif spin_lock_mutex(&lock->wait_lock, flags); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
