X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=kernel%2Fworkqueue.c;h=4dd494f786bcdae8cc0fb93d2cdbcd3189a06f16;hb=refs%2Fheads%2Ftizen-6.1.y;hp=7cd5f5e7e0a1bf3a51c8e070aac09d7dca9864f8;hpb=66b834558537c623135241e1ea9ddf11b31596e4;p=platform%2Fkernel%2Flinux-starfive.git

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 7cd5f5e..4dd494f 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -326,7 +326,7 @@ static struct rcuwait manager_wait = __RCUWAIT_INITIALIZER(manager_wait);
 static LIST_HEAD(workqueues);		/* PR: list of all workqueues */
 static bool workqueue_freezing;		/* PL: have wqs started freezing? */
 
-/* PL: allowable cpus for unbound wqs and work items */
+/* PL&A: allowable cpus for unbound wqs and work items */
 static cpumask_var_t wq_unbound_cpumask;
 
 /* CPU where unbound work was last round robin scheduled from this CPU */
@@ -3952,7 +3952,8 @@ static void apply_wqattrs_cleanup(struct apply_wqattrs_ctx *ctx)
 /* allocate the attrs and pwqs for later installation */
 static struct apply_wqattrs_ctx *
 apply_wqattrs_prepare(struct workqueue_struct *wq,
-		      const struct workqueue_attrs *attrs)
+		      const struct workqueue_attrs *attrs,
+		      const cpumask_var_t unbound_cpumask)
 {
 	struct apply_wqattrs_ctx *ctx;
 	struct workqueue_attrs *new_attrs, *tmp_attrs;
@@ -3968,14 +3969,15 @@ apply_wqattrs_prepare(struct workqueue_struct *wq,
 		goto out_free;
 
 	/*
-	 * Calculate the attrs of the default pwq.
+	 * Calculate the attrs of the default pwq with unbound_cpumask
+	 * which is wq_unbound_cpumask or to set to wq_unbound_cpumask.
 	 * If the user configured cpumask doesn't overlap with the
 	 * wq_unbound_cpumask, we fallback to the wq_unbound_cpumask.
 	 */
 	copy_workqueue_attrs(new_attrs, attrs);
-	cpumask_and(new_attrs->cpumask, new_attrs->cpumask, wq_unbound_cpumask);
+	cpumask_and(new_attrs->cpumask, new_attrs->cpumask, unbound_cpumask);
 	if (unlikely(cpumask_empty(new_attrs->cpumask)))
-		cpumask_copy(new_attrs->cpumask, wq_unbound_cpumask);
+		cpumask_copy(new_attrs->cpumask, unbound_cpumask);
 
 	/*
 	 * We may create multiple pwqs with differing cpumasks.  Make a
@@ -4072,7 +4074,7 @@ static int apply_workqueue_attrs_locked(struct workqueue_struct *wq,
 		wq->flags &= ~__WQ_ORDERED;
 	}
 
-	ctx = apply_wqattrs_prepare(wq, attrs);
+	ctx = apply_wqattrs_prepare(wq, attrs, wq_unbound_cpumask);
 	if (!ctx)
 		return -ENOMEM;
 
@@ -4848,10 +4850,16 @@ static void show_one_worker_pool(struct worker_pool *pool)
 	struct worker *worker;
 	bool first = true;
 	unsigned long flags;
+	unsigned long hung = 0;
 
 	raw_spin_lock_irqsave(&pool->lock, flags);
 	if (pool->nr_workers == pool->nr_idle)
 		goto next_pool;
+
+	/* How long the first pending work is waiting for a worker. */
+	if (!list_empty(&pool->worklist))
+		hung = jiffies_to_msecs(jiffies - pool->watchdog_ts) / 1000;
+
 	/*
 	 * Defer printing to avoid deadlocks in console drivers that
 	 * queue work while holding locks also taken in their write
@@ -4860,9 +4868,7 @@ static void show_one_worker_pool(struct worker_pool *pool)
 	printk_deferred_enter();
 	pr_info("pool %d:", pool->id);
 	pr_cont_pool_info(pool);
-	pr_cont(" hung=%us workers=%d",
-		jiffies_to_msecs(jiffies - pool->watchdog_ts) / 1000,
-		pool->nr_workers);
+	pr_cont(" hung=%lus workers=%d", hung, pool->nr_workers);
 	if (pool->manager)
 		pr_cont(" manager: %d",
 			task_pid_nr(pool->manager->task));
@@ -5334,7 +5340,7 @@ out_unlock:
 }
 #endif /* CONFIG_FREEZER */
 
-static int workqueue_apply_unbound_cpumask(void)
+static int workqueue_apply_unbound_cpumask(const cpumask_var_t unbound_cpumask)
 {
 	LIST_HEAD(ctxs);
 	int ret = 0;
@@ -5350,7 +5356,7 @@ static int workqueue_apply_unbound_cpumask(void)
 		if (wq->flags & __WQ_ORDERED)
 			continue;
 
-		ctx = apply_wqattrs_prepare(wq, wq->unbound_attrs);
+		ctx = apply_wqattrs_prepare(wq, wq->unbound_attrs, unbound_cpumask);
 		if (!ctx) {
 			ret = -ENOMEM;
 			break;
@@ -5365,6 +5371,11 @@ static int workqueue_apply_unbound_cpumask(void)
 		apply_wqattrs_cleanup(ctx);
 	}
 
+	if (!ret) {
+		mutex_lock(&wq_pool_attach_mutex);
+		cpumask_copy(wq_unbound_cpumask, unbound_cpumask);
+		mutex_unlock(&wq_pool_attach_mutex);
+	}
 	return ret;
 }
 
@@ -5383,7 +5394,6 @@ static int workqueue_apply_unbound_cpumask(void)
 int workqueue_set_unbound_cpumask(cpumask_var_t cpumask)
 {
 	int ret = -EINVAL;
-	cpumask_var_t saved_cpumask;
 
 	/*
 	 * Not excluding isolated cpus on purpose.
@@ -5397,23 +5407,8 @@ int workqueue_set_unbound_cpumask(cpumask_var_t cpumask)
 			goto out_unlock;
 		}
 
-		if (!zalloc_cpumask_var(&saved_cpumask, GFP_KERNEL)) {
-			ret = -ENOMEM;
-			goto out_unlock;
-		}
-
-		/* save the old wq_unbound_cpumask. */
-		cpumask_copy(saved_cpumask, wq_unbound_cpumask);
-
-		/* update wq_unbound_cpumask at first and apply it to wqs. */
-		cpumask_copy(wq_unbound_cpumask, cpumask);
-		ret = workqueue_apply_unbound_cpumask();
-
-		/* restore the wq_unbound_cpumask when failed. */
-		if (ret < 0)
-			cpumask_copy(wq_unbound_cpumask, saved_cpumask);
+		ret = workqueue_apply_unbound_cpumask(cpumask);
 
-		free_cpumask_var(saved_cpumask);
 out_unlock:
 		apply_wqattrs_unlock();
 	}