diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kprobes.c | 15 | ||||
| -rw-r--r-- | kernel/sched.c | 22 |
2 files changed, 23 insertions, 14 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index 1e0250cb9486..d4998f81e229 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -699,8 +699,9 @@ static int __register_kprobes(struct kprobe **kps, int num, return -EINVAL; for (i = 0; i < num; i++) { ret = __register_kprobe(kps[i], called_from); - if (ret < 0 && i > 0) { - unregister_kprobes(kps, i); + if (ret < 0) { + if (i > 0) + unregister_kprobes(kps, i); break; } } @@ -776,8 +777,9 @@ static int __register_jprobes(struct jprobe **jps, int num, jp->kp.break_handler = longjmp_break_handler; ret = __register_kprobe(&jp->kp, called_from); } - if (ret < 0 && i > 0) { - unregister_jprobes(jps, i); + if (ret < 0) { + if (i > 0) + unregister_jprobes(jps, i); break; } } @@ -920,8 +922,9 @@ static int __register_kretprobes(struct kretprobe **rps, int num, return -EINVAL; for (i = 0; i < num; i++) { ret = __register_kretprobe(rps[i], called_from); - if (ret < 0 && i > 0) { - unregister_kretprobes(rps, i); + if (ret < 0) { + if (i > 0) + unregister_kretprobes(rps, i); break; } } diff --git a/kernel/sched.c b/kernel/sched.c index bfb8ad8ed171..eaf6751e7612 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -312,12 +312,15 @@ static DEFINE_SPINLOCK(task_group_lock); #endif /* - * A weight of 0, 1 or ULONG_MAX can cause arithmetics problems. + * A weight of 0 or 1 can cause arithmetics problems. + * A weight of a cfs_rq is the sum of weights of which entities + * are queued on this cfs_rq, so a weight of a entity should not be + * too large, so as the shares value of a task group. * (The default weight is 1024 - so there's no practical * limitation from this.) */ #define MIN_SHARES 2 -#define MAX_SHARES (ULONG_MAX - 1) +#define MAX_SHARES (1UL << 18) static int init_task_group_load = INIT_TASK_GROUP_LOAD; #endif @@ -1337,8 +1340,13 @@ calc_delta_mine(unsigned long delta_exec, unsigned long weight, { u64 tmp; - if (!lw->inv_weight) - lw->inv_weight = 1 + (WMULT_CONST-lw->weight/2)/(lw->weight+1); + if (!lw->inv_weight) { + if (BITS_PER_LONG > 32 && unlikely(lw->weight >= WMULT_CONST)) + lw->inv_weight = 1; + else + lw->inv_weight = 1 + (WMULT_CONST-lw->weight/2) + / (lw->weight+1); + } tmp = (u64)delta_exec * weight; /* @@ -4159,12 +4167,10 @@ need_resched_nonpreemptible: clear_tsk_need_resched(prev); if (prev->state && !(preempt_count() & PREEMPT_ACTIVE)) { - if (unlikely((prev->state & TASK_INTERRUPTIBLE) && - signal_pending(prev))) { + if (unlikely(signal_pending_state(prev->state, prev))) prev->state = TASK_RUNNING; - } else { + else deactivate_task(rq, prev, 1); - } switch_count = &prev->nvcsw; } |