diff options
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 42ad2f708e65..2d5323611a14 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -666,15 +666,17 @@ int do_fork(unsigned long clone_flags, unsigned long stack_start, p->pdeath_signal = 0; /* - * "share" dynamic priority between parent and child, thus the - * total amount of dynamic priorities in the system doesnt change, - * more scheduling fairness. This is only important in the first - * timeslice, on the long run the scheduling behaviour is unchanged. + * Give the parent's dynamic priority entirely to the child. The + * total amount of dynamic priorities in the system doesn't change + * (more scheduling fairness), but the child will run first, which + * is especially useful in avoiding a lot of copy-on-write faults + * if the child for a fork() just wants to do a few simple things + * and then exec(). This is only important in the first timeslice. + * In the long run, the scheduling behavior is unchanged. */ - p->counter = (current->counter + 1) >> 1; - current->counter >>= 1; - if (!current->counter) - current->need_resched = 1; + p->counter = current->counter; + current->counter = 0; + current->need_resched = 1; /* * Ok, add it to the run-queues and make it |