kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected

[platform/kernel/linux-rpi.git] / kernel / sysctl.c

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 587ed04..34c1278 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2437,6 +2437,17 @@ static struct ctl_table kern_table[] = {
        },
 #endif
 #ifdef CONFIG_DETECT_HUNG_TASK
+#ifdef CONFIG_SMP
+       {
+               .procname       = "hung_task_all_cpu_backtrace",
+               .data           = &sysctl_hung_task_all_cpu_backtrace,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = SYSCTL_ZERO,
+               .extra2         = SYSCTL_ONE,
+       },
+#endif /* CONFIG_SMP */
        {
                .procname       = "hung_task_panic",
                .data           = &sysctl_hung_task_panic,