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-rw-r--r--kernel/workqueue.c38
1 files changed, 37 insertions, 1 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 9a3128d..bc63253 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -3590,6 +3590,41 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
return notifier_from_errno(0);
}
+/*
+ * Workqueues should be brought up before normal priority CPU notifiers.
+ * This will be registered high priority CPU notifier.
+ */
+static int __devinit workqueue_cpu_up_callback(struct notifier_block *nfb,
+ unsigned long action,
+ void *hcpu)
+{
+ switch (action & ~CPU_TASKS_FROZEN) {
+ case CPU_UP_PREPARE:
+ case CPU_UP_CANCELED:
+ case CPU_DOWN_FAILED:
+ case CPU_ONLINE:
+ return workqueue_cpu_callback(nfb, action, hcpu);
+ }
+ return NOTIFY_OK;
+}
+
+/*
+ * Workqueues should be brought down after normal priority CPU notifiers.
+ * This will be registered as low priority CPU notifier.
+ */
+static int __devinit workqueue_cpu_down_callback(struct notifier_block *nfb,
+ unsigned long action,
+ void *hcpu)
+{
+ switch (action & ~CPU_TASKS_FROZEN) {
+ case CPU_DOWN_PREPARE:
+ case CPU_DYING:
+ case CPU_POST_DEAD:
+ return workqueue_cpu_callback(nfb, action, hcpu);
+ }
+ return NOTIFY_OK;
+}
+
#ifdef CONFIG_SMP
struct work_for_cpu {
@@ -3783,7 +3818,8 @@ static int __init init_workqueues(void)
unsigned int cpu;
int i;
- cpu_notifier(workqueue_cpu_callback, CPU_PRI_WORKQUEUE);
+ cpu_notifier(workqueue_cpu_up_callback, CPU_PRI_WORKQUEUE_UP);
+ cpu_notifier(workqueue_cpu_down_callback, CPU_PRI_WORKQUEUE_DOWN);
/* initialize gcwqs */
for_each_gcwq_cpu(cpu) {