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Diffstat (limited to 'kernel/softlockup.c')
-rw-r--r--kernel/softlockup.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 01b6522fd92..78e0ad21cb0 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -27,6 +27,21 @@ static DEFINE_PER_CPU(struct task_struct *, watchdog_task);
static int __read_mostly did_panic;
unsigned long __read_mostly softlockup_thresh = 60;
+/*
+ * Should we panic (and reboot, if panic_timeout= is set) when a
+ * soft-lockup occurs:
+ */
+unsigned int __read_mostly softlockup_panic =
+ CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC_VALUE;
+
+static int __init softlockup_panic_setup(char *str)
+{
+ softlockup_panic = simple_strtoul(str, NULL, 0);
+
+ return 1;
+}
+__setup("softlockup_panic=", softlockup_panic_setup);
+
static int
softlock_panic(struct notifier_block *this, unsigned long event, void *ptr)
{
@@ -120,6 +135,9 @@ void softlockup_tick(void)
else
dump_stack();
spin_unlock(&print_lock);
+
+ if (softlockup_panic)
+ panic("softlockup: hung tasks");
}
/*
@@ -172,6 +190,9 @@ static void check_hung_task(struct task_struct *t, unsigned long now)
t->last_switch_timestamp = now;
touch_nmi_watchdog();
+
+ if (softlockup_panic)
+ panic("softlockup: blocked tasks");
}
/*