svm: reduce log of run queue and atomic->atomic64

ascend inclusion
category: feature
bugzilla: 16554
CVE: NA

--------

svm add the catch the log of run queue, when open
the sched debug
Signed-off-by: NJiankang Chen <chenjiankang1@huawei.com>
Signed-off-by: NQiang Xu <xuqiang36@huawei.com>
Signed-off-by: NLijun Fang <fanglijun3@huawei.com>
Reviewed-by: NLi Zefan <lizefan@huawei.com>
Reviewed-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/char/svm.c

@@ -108,7 +108,7 @@ struct svm_context {
 	struct svm_process	*process;
 	struct svm_device	*sdev;
 	struct list_head	process_head;
-	atomic_t		ref;
+	atomic64_t		ref;
 };
 
 #ifndef CONFIG_ACPI
@@ -169,6 +169,21 @@ static char *svm_cmd_to_string(unsigned int cmd)
 	return NULL;
 }
 
+#ifndef CONFIG_ACPI
+
+extern void sysrq_sched_debug_tidy(void);
+
+void sysrq_sched_debug_show_export(void)
+{
+#ifdef CONFIG_SCHED_DEBUG
+	sysrq_sched_debug_tidy();
+#else
+	pr_err("Not open CONFIG_SCHED_DEBUG\n");
+#endif
+}
+EXPORT_SYMBOL(sysrq_sched_debug_show_export);
+#endif
+
 static struct svm_process *find_svm_process(unsigned long asid)
 {
 	struct rb_node *node = svm_process_root.rb_node;
@@ -742,7 +757,7 @@ static struct svm_context *svm_process_attach(struct svm_process *process,
 
 	context->process = process;
 	context->sdev = sdev;
-	atomic_set(&context->ref, 1);
+	atomic64_set(&context->ref, 1);
 #ifdef CONFIG_ACPI
 	list_for_each_entry(pos, &child_list, entry) {
 		svm_bind_core(pos, process);
@@ -844,7 +859,7 @@ static int svm_process_bind(struct task_struct *task,
 			*ttbr = virt_to_phys(mm->pgd) | asid << ASID_SHIFT;
 			*tcr  = read_sysreg(tcr_el1);
 			*pasid = process->pasid;
-			atomic_inc(&context->ref);
+			atomic64_inc(&context->ref);
 			/* One context keep a ref of process */
 			svm_process_put_locked(process);
 

kernel/sched/debug.c

@@ -780,6 +780,33 @@ void sysrq_sched_debug_show(void)
 
 }
 
+static void print_cpu_tidy(struct seq_file *m, int cpu)
+{
+	struct rq *run_queue = cpu_rq(cpu);
+	unsigned long flags;
+
+	SEQ_printf(m, "cpu#%d\n", cpu);
+	spin_lock_irqsave(&sched_debug_lock, flags);
+
+	print_rq(m, run_queue, cpu);
+	spin_unlock_irqrestore(&sched_debug_lock, flags);
+	SEQ_printf(m, "\n");
+
+}
+
+void sysrq_sched_debug_tidy(void)
+{
+	int cpu;
+
+	SEQ_printf(NULL, "Sched Debug Version: v0.11, %s %.*s\n",
+		init_utsname()->release,
+		(int)strcspn(init_utsname()->version, " "),
+		init_utsname()->version);
+
+	for_each_online_cpu(cpu)
+		print_cpu_tidy(NULL, cpu);
+}
+
 /*
  * This itererator needs some explanation.
  * It returns 1 for the header position.