aboutsummaryrefslogtreecommitdiffstats
path: root/kernel/sched_rt.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 12:02:01 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 12:02:01 -0500
commit8f0ddf91f2aeb09602373e400cf8b403e9017210 (patch)
treeb907c35c79caadafff6ad46a91614e30afd2f967 /kernel/sched_rt.c
parent050cbb09dac0402672edeaeac06094ef8ff1749a (diff)
parentb5f91da0a6973bb6f9ff3b91b0e92c0773a458f3 (diff)
Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits) clockevents: Convert to raw_spinlock clockevents: Make tick_device_lock static debugobjects: Convert to raw_spinlocks perf_event: Convert to raw_spinlock hrtimers: Convert to raw_spinlocks genirq: Convert irq_desc.lock to raw_spinlock smp: Convert smplocks to raw_spinlocks rtmutes: Convert rtmutex.lock to raw_spinlock sched: Convert pi_lock to raw_spinlock sched: Convert cpupri lock to raw_spinlock sched: Convert rt_runtime_lock to raw_spinlock sched: Convert rq->lock to raw_spinlock plist: Make plist debugging raw_spinlock aware bkl: Fixup core_lock fallout locking: Cleanup the name space completely locking: Further name space cleanups alpha: Fix fallout from locking changes locking: Implement new raw_spinlock locking: Convert raw_rwlock functions to arch_rwlock locking: Convert raw_rwlock to arch_rwlock ...
Diffstat (limited to 'kernel/sched_rt.c')
-rw-r--r--kernel/sched_rt.c60
1 files changed, 30 insertions, 30 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index aecbd9c6b20c..d2ea2828164e 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -327,7 +327,7 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
327 327
328 weight = cpumask_weight(rd->span); 328 weight = cpumask_weight(rd->span);
329 329
330 spin_lock(&rt_b->rt_runtime_lock); 330 raw_spin_lock(&rt_b->rt_runtime_lock);
331 rt_period = ktime_to_ns(rt_b->rt_period); 331 rt_period = ktime_to_ns(rt_b->rt_period);
332 for_each_cpu(i, rd->span) { 332 for_each_cpu(i, rd->span) {
333 struct rt_rq *iter = sched_rt_period_rt_rq(rt_b, i); 333 struct rt_rq *iter = sched_rt_period_rt_rq(rt_b, i);
@@ -336,7 +336,7 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
336 if (iter == rt_rq) 336 if (iter == rt_rq)
337 continue; 337 continue;
338 338
339 spin_lock(&iter->rt_runtime_lock); 339 raw_spin_lock(&iter->rt_runtime_lock);
340 /* 340 /*
341 * Either all rqs have inf runtime and there's nothing to steal 341 * Either all rqs have inf runtime and there's nothing to steal
342 * or __disable_runtime() below sets a specific rq to inf to 342 * or __disable_runtime() below sets a specific rq to inf to
@@ -358,14 +358,14 @@ static int do_balance_runtime(struct rt_rq *rt_rq)
358 rt_rq->rt_runtime += diff; 358 rt_rq->rt_runtime += diff;
359 more = 1; 359 more = 1;
360 if (rt_rq->rt_runtime == rt_period) { 360 if (rt_rq->rt_runtime == rt_period) {
361 spin_unlock(&iter->rt_runtime_lock); 361 raw_spin_unlock(&iter->rt_runtime_lock);
362 break; 362 break;
363 } 363 }
364 } 364 }
365next: 365next:
366 spin_unlock(&iter->rt_runtime_lock); 366 raw_spin_unlock(&iter->rt_runtime_lock);
367 } 367 }
368 spin_unlock(&rt_b->rt_runtime_lock); 368 raw_spin_unlock(&rt_b->rt_runtime_lock);
369 369
370 return more; 370 return more;
371} 371}
@@ -386,8 +386,8 @@ static void __disable_runtime(struct rq *rq)
386 s64 want; 386 s64 want;
387 int i; 387 int i;
388 388
389 spin_lock(&rt_b->rt_runtime_lock); 389 raw_spin_lock(&rt_b->rt_runtime_lock);
390 spin_lock(&rt_rq->rt_runtime_lock); 390 raw_spin_lock(&rt_rq->rt_runtime_lock);
391 /* 391 /*
392 * Either we're all inf and nobody needs to borrow, or we're 392 * Either we're all inf and nobody needs to borrow, or we're
393 * already disabled and thus have nothing to do, or we have 393 * already disabled and thus have nothing to do, or we have
@@ -396,7 +396,7 @@ static void __disable_runtime(struct rq *rq)
396 if (rt_rq->rt_runtime == RUNTIME_INF || 396 if (rt_rq->rt_runtime == RUNTIME_INF ||
397 rt_rq->rt_runtime == rt_b->rt_runtime) 397 rt_rq->rt_runtime == rt_b->rt_runtime)
398 goto balanced; 398 goto balanced;
399 spin_unlock(&rt_rq->rt_runtime_lock); 399 raw_spin_unlock(&rt_rq->rt_runtime_lock);
400 400
401 /* 401 /*
402 * Calculate the difference between what we started out with 402 * Calculate the difference between what we started out with
@@ -418,7 +418,7 @@ static void __disable_runtime(struct rq *rq)
418 if (iter == rt_rq || iter->rt_runtime == RUNTIME_INF) 418 if (iter == rt_rq || iter->rt_runtime == RUNTIME_INF)
419 continue; 419 continue;
420 420
421 spin_lock(&iter->rt_runtime_lock); 421 raw_spin_lock(&iter->rt_runtime_lock);
422 if (want > 0) { 422 if (want > 0) {
423 diff = min_t(s64, iter->rt_runtime, want); 423 diff = min_t(s64, iter->rt_runtime, want);
424 iter->rt_runtime -= diff; 424 iter->rt_runtime -= diff;
@@ -427,13 +427,13 @@ static void __disable_runtime(struct rq *rq)
427 iter->rt_runtime -= want; 427 iter->rt_runtime -= want;
428 want -= want; 428 want -= want;
429 } 429 }
430 spin_unlock(&iter->rt_runtime_lock); 430 raw_spin_unlock(&iter->rt_runtime_lock);
431 431
432 if (!want) 432 if (!want)
433 break; 433 break;
434 } 434 }
435 435
436 spin_lock(&rt_rq->rt_runtime_lock); 436 raw_spin_lock(&rt_rq->rt_runtime_lock);
437 /* 437 /*
438 * We cannot be left wanting - that would mean some runtime 438 * We cannot be left wanting - that would mean some runtime
439 * leaked out of the system. 439 * leaked out of the system.
@@ -445,8 +445,8 @@ balanced:
445 * runtime - in which case borrowing doesn't make sense. 445 * runtime - in which case borrowing doesn't make sense.
446 */ 446 */
447 rt_rq->rt_runtime = RUNTIME_INF; 447 rt_rq->rt_runtime = RUNTIME_INF;
448 spin_unlock(&rt_rq->rt_runtime_lock); 448 raw_spin_unlock(&rt_rq->rt_runtime_lock);
449 spin_unlock(&rt_b->rt_runtime_lock); 449 raw_spin_unlock(&rt_b->rt_runtime_lock);
450 } 450 }
451} 451}
452 452
@@ -454,9 +454,9 @@ static void disable_runtime(struct rq *rq)
454{ 454{
455 unsigned long flags; 455 unsigned long flags;
456 456
457 spin_lock_irqsave(&rq->lock, flags); 457 raw_spin_lock_irqsave(&rq->lock, flags);
458 __disable_runtime(rq); 458 __disable_runtime(rq);
459 spin_unlock_irqrestore(&rq->lock, flags); 459 raw_spin_unlock_irqrestore(&rq->lock, flags);
460} 460}
461 461
462static void __enable_runtime(struct rq *rq) 462static void __enable_runtime(struct rq *rq)
@@ -472,13 +472,13 @@ static void __enable_runtime(struct rq *rq)
472 for_each_leaf_rt_rq(rt_rq, rq) { 472 for_each_leaf_rt_rq(rt_rq, rq) {
473 struct rt_bandwidth *rt_b = sched_rt_bandwidth(rt_rq); 473 struct rt_bandwidth *rt_b = sched_rt_bandwidth(rt_rq);
474 474
475 spin_lock(&rt_b->rt_runtime_lock); 475 raw_spin_lock(&rt_b->rt_runtime_lock);
476 spin_lock(&rt_rq->rt_runtime_lock); 476 raw_spin_lock(&rt_rq->rt_runtime_lock);
477 rt_rq->rt_runtime = rt_b->rt_runtime; 477 rt_rq->rt_runtime = rt_b->rt_runtime;
478 rt_rq->rt_time = 0; 478 rt_rq->rt_time = 0;
479 rt_rq->rt_throttled = 0; 479 rt_rq->rt_throttled = 0;
480 spin_unlock(&rt_rq->rt_runtime_lock); 480 raw_spin_unlock(&rt_rq->rt_runtime_lock);
481 spin_unlock(&rt_b->rt_runtime_lock); 481 raw_spin_unlock(&rt_b->rt_runtime_lock);
482 } 482 }
483} 483}
484 484
@@ -486,9 +486,9 @@ static void enable_runtime(struct rq *rq)
486{ 486{
487 unsigned long flags; 487 unsigned long flags;
488 488
489 spin_lock_irqsave(&rq->lock, flags); 489 raw_spin_lock_irqsave(&rq->lock, flags);
490 __enable_runtime(rq); 490 __enable_runtime(rq);
491 spin_unlock_irqrestore(&rq->lock, flags); 491 raw_spin_unlock_irqrestore(&rq->lock, flags);
492} 492}
493 493
494static int balance_runtime(struct rt_rq *rt_rq) 494static int balance_runtime(struct rt_rq *rt_rq)
@@ -496,9 +496,9 @@ static int balance_runtime(struct rt_rq *rt_rq)
496 int more = 0; 496 int more = 0;
497 497
498 if (rt_rq->rt_time > rt_rq->rt_runtime) { 498 if (rt_rq->rt_time > rt_rq->rt_runtime) {
499 spin_unlock(&rt_rq->rt_runtime_lock); 499 raw_spin_unlock(&rt_rq->rt_runtime_lock);
500 more = do_balance_runtime(rt_rq); 500 more = do_balance_runtime(rt_rq);
501 spin_lock(&rt_rq->rt_runtime_lock); 501 raw_spin_lock(&rt_rq->rt_runtime_lock);
502 } 502 }
503 503
504 return more; 504 return more;
@@ -524,11 +524,11 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
524 struct rt_rq *rt_rq = sched_rt_period_rt_rq(rt_b, i); 524 struct rt_rq *rt_rq = sched_rt_period_rt_rq(rt_b, i);
525 struct rq *rq = rq_of_rt_rq(rt_rq); 525 struct rq *rq = rq_of_rt_rq(rt_rq);
526 526
527 spin_lock(&rq->lock); 527 raw_spin_lock(&rq->lock);
528 if (rt_rq->rt_time) { 528 if (rt_rq->rt_time) {
529 u64 runtime; 529 u64 runtime;
530 530
531 spin_lock(&rt_rq->rt_runtime_lock); 531 raw_spin_lock(&rt_rq->rt_runtime_lock);
532 if (rt_rq->rt_throttled) 532 if (rt_rq->rt_throttled)
533 balance_runtime(rt_rq); 533 balance_runtime(rt_rq);
534 runtime = rt_rq->rt_runtime; 534 runtime = rt_rq->rt_runtime;
@@ -539,13 +539,13 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun)
539 } 539 }
540 if (rt_rq->rt_time || rt_rq->rt_nr_running) 540 if (rt_rq->rt_time || rt_rq->rt_nr_running)
541 idle = 0; 541 idle = 0;
542 spin_unlock(&rt_rq->rt_runtime_lock); 542 raw_spin_unlock(&rt_rq->rt_runtime_lock);
543 } else if (rt_rq->rt_nr_running) 543 } else if (rt_rq->rt_nr_running)
544 idle = 0; 544 idle = 0;
545 545
546 if (enqueue) 546 if (enqueue)
547 sched_rt_rq_enqueue(rt_rq); 547 sched_rt_rq_enqueue(rt_rq);
548 spin_unlock(&rq->lock); 548 raw_spin_unlock(&rq->lock);
549 } 549 }
550 550
551 return idle; 551 return idle;
@@ -624,11 +624,11 @@ static void update_curr_rt(struct rq *rq)
624 rt_rq = rt_rq_of_se(rt_se); 624 rt_rq = rt_rq_of_se(rt_se);
625 625
626 if (sched_rt_runtime(rt_rq) != RUNTIME_INF) { 626 if (sched_rt_runtime(rt_rq) != RUNTIME_INF) {
627 spin_lock(&rt_rq->rt_runtime_lock); 627 raw_spin_lock(&rt_rq->rt_runtime_lock);
628 rt_rq->rt_time += delta_exec; 628 rt_rq->rt_time += delta_exec;
629 if (sched_rt_runtime_exceeded(rt_rq)) 629 if (sched_rt_runtime_exceeded(rt_rq))
630 resched_task(curr); 630 resched_task(curr);
631 spin_unlock(&rt_rq->rt_runtime_lock); 631 raw_spin_unlock(&rt_rq->rt_runtime_lock);
632 } 632 }
633 } 633 }
634} 634}
@@ -1246,7 +1246,7 @@ static struct rq *find_lock_lowest_rq(struct task_struct *task, struct rq *rq)
1246 task_running(rq, task) || 1246 task_running(rq, task) ||
1247 !task->se.on_rq)) { 1247 !task->se.on_rq)) {
1248 1248
1249 spin_unlock(&lowest_rq->lock); 1249 raw_spin_unlock(&lowest_rq->lock);
1250 lowest_rq = NULL; 1250 lowest_rq = NULL;
1251 break; 1251 break;
1252 } 1252 }