lockdep: Use "WARNING" tag on lockdep splats
This commit changes lockdep splats to begin lines with "WARNING" and to use pr_warn() instead of printk(). This change eases scripted analysis of kernel console output. Reported-by: Dmitry Vyukov <dvyukov@google.com> Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>hifive-unleashed-5.1
Paul E. McKenney
parent
5f0d5a3ae7
commit
a5dd63efda
|
|
@ -1144,10 +1144,10 @@ print_circular_bug_header(struct lock_list *entry, unsigned int depth,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("======================================================\n");
|
||||
printk("[ INFO: possible circular locking dependency detected ]\n");
|
||||
pr_warn("======================================================\n");
|
||||
pr_warn("WARNING: possible circular locking dependency detected\n");
|
||||
print_kernel_ident();
|
||||
printk("-------------------------------------------------------\n");
|
||||
pr_warn("------------------------------------------------------\n");
|
||||
printk("%s/%d is trying to acquire lock:\n",
|
||||
curr->comm, task_pid_nr(curr));
|
||||
print_lock(check_src);
|
||||
|
|
@ -1482,11 +1482,11 @@ print_bad_irq_dependency(struct task_struct *curr,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("======================================================\n");
|
||||
printk("[ INFO: %s-safe -> %s-unsafe lock order detected ]\n",
|
||||
pr_warn("=====================================================\n");
|
||||
pr_warn("WARNING: %s-safe -> %s-unsafe lock order detected\n",
|
||||
irqclass, irqclass);
|
||||
print_kernel_ident();
|
||||
printk("------------------------------------------------------\n");
|
||||
pr_warn("-----------------------------------------------------\n");
|
||||
printk("%s/%d [HC%u[%lu]:SC%u[%lu]:HE%u:SE%u] is trying to acquire:\n",
|
||||
curr->comm, task_pid_nr(curr),
|
||||
curr->hardirq_context, hardirq_count() >> HARDIRQ_SHIFT,
|
||||
|
|
@ -1711,10 +1711,10 @@ print_deadlock_bug(struct task_struct *curr, struct held_lock *prev,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("=============================================\n");
|
||||
printk("[ INFO: possible recursive locking detected ]\n");
|
||||
pr_warn("============================================\n");
|
||||
pr_warn("WARNING: possible recursive locking detected\n");
|
||||
print_kernel_ident();
|
||||
printk("---------------------------------------------\n");
|
||||
pr_warn("--------------------------------------------\n");
|
||||
printk("%s/%d is trying to acquire lock:\n",
|
||||
curr->comm, task_pid_nr(curr));
|
||||
print_lock(next);
|
||||
|
|
@ -2061,10 +2061,10 @@ static void print_collision(struct task_struct *curr,
|
|||
struct lock_chain *chain)
|
||||
{
|
||||
printk("\n");
|
||||
printk("======================\n");
|
||||
printk("[chain_key collision ]\n");
|
||||
pr_warn("============================\n");
|
||||
pr_warn("WARNING: chain_key collision\n");
|
||||
print_kernel_ident();
|
||||
printk("----------------------\n");
|
||||
pr_warn("----------------------------\n");
|
||||
printk("%s/%d: ", current->comm, task_pid_nr(current));
|
||||
printk("Hash chain already cached but the contents don't match!\n");
|
||||
|
||||
|
|
@ -2360,10 +2360,10 @@ print_usage_bug(struct task_struct *curr, struct held_lock *this,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("=================================\n");
|
||||
printk("[ INFO: inconsistent lock state ]\n");
|
||||
pr_warn("================================\n");
|
||||
pr_warn("WARNING: inconsistent lock state\n");
|
||||
print_kernel_ident();
|
||||
printk("---------------------------------\n");
|
||||
pr_warn("--------------------------------\n");
|
||||
|
||||
printk("inconsistent {%s} -> {%s} usage.\n",
|
||||
usage_str[prev_bit], usage_str[new_bit]);
|
||||
|
|
@ -2425,10 +2425,10 @@ print_irq_inversion_bug(struct task_struct *curr,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("=========================================================\n");
|
||||
printk("[ INFO: possible irq lock inversion dependency detected ]\n");
|
||||
pr_warn("========================================================\n");
|
||||
pr_warn("WARNING: possible irq lock inversion dependency detected\n");
|
||||
print_kernel_ident();
|
||||
printk("---------------------------------------------------------\n");
|
||||
pr_warn("--------------------------------------------------------\n");
|
||||
printk("%s/%d just changed the state of lock:\n",
|
||||
curr->comm, task_pid_nr(curr));
|
||||
print_lock(this);
|
||||
|
|
@ -3170,10 +3170,10 @@ print_lock_nested_lock_not_held(struct task_struct *curr,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("==================================\n");
|
||||
printk("[ BUG: Nested lock was not taken ]\n");
|
||||
pr_warn("==================================\n");
|
||||
pr_warn("WARNING: Nested lock was not taken\n");
|
||||
print_kernel_ident();
|
||||
printk("----------------------------------\n");
|
||||
pr_warn("----------------------------------\n");
|
||||
|
||||
printk("%s/%d is trying to lock:\n", curr->comm, task_pid_nr(curr));
|
||||
print_lock(hlock);
|
||||
|
|
@ -3383,10 +3383,10 @@ print_unlock_imbalance_bug(struct task_struct *curr, struct lockdep_map *lock,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("=====================================\n");
|
||||
printk("[ BUG: bad unlock balance detected! ]\n");
|
||||
pr_warn("=====================================\n");
|
||||
pr_warn("WARNING: bad unlock balance detected!\n");
|
||||
print_kernel_ident();
|
||||
printk("-------------------------------------\n");
|
||||
pr_warn("-------------------------------------\n");
|
||||
printk("%s/%d is trying to release lock (",
|
||||
curr->comm, task_pid_nr(curr));
|
||||
print_lockdep_cache(lock);
|
||||
|
|
@ -3880,10 +3880,10 @@ print_lock_contention_bug(struct task_struct *curr, struct lockdep_map *lock,
|
|||
return 0;
|
||||
|
||||
printk("\n");
|
||||
printk("=================================\n");
|
||||
printk("[ BUG: bad contention detected! ]\n");
|
||||
pr_warn("=================================\n");
|
||||
pr_warn("WARNING: bad contention detected!\n");
|
||||
print_kernel_ident();
|
||||
printk("---------------------------------\n");
|
||||
pr_warn("---------------------------------\n");
|
||||
printk("%s/%d is trying to contend lock (",
|
||||
curr->comm, task_pid_nr(curr));
|
||||
print_lockdep_cache(lock);
|
||||
|
|
@ -4244,10 +4244,10 @@ print_freed_lock_bug(struct task_struct *curr, const void *mem_from,
|
|||
return;
|
||||
|
||||
printk("\n");
|
||||
printk("=========================\n");
|
||||
printk("[ BUG: held lock freed! ]\n");
|
||||
pr_warn("=========================\n");
|
||||
pr_warn("WARNING: held lock freed!\n");
|
||||
print_kernel_ident();
|
||||
printk("-------------------------\n");
|
||||
pr_warn("-------------------------\n");
|
||||
printk("%s/%d is freeing memory %p-%p, with a lock still held there!\n",
|
||||
curr->comm, task_pid_nr(curr), mem_from, mem_to-1);
|
||||
print_lock(hlock);
|
||||
|
|
@ -4302,11 +4302,11 @@ static void print_held_locks_bug(void)
|
|||
return;
|
||||
|
||||
printk("\n");
|
||||
printk("=====================================\n");
|
||||
printk("[ BUG: %s/%d still has locks held! ]\n",
|
||||
pr_warn("====================================\n");
|
||||
pr_warn("WARNING: %s/%d still has locks held!\n",
|
||||
current->comm, task_pid_nr(current));
|
||||
print_kernel_ident();
|
||||
printk("-------------------------------------\n");
|
||||
pr_warn("------------------------------------\n");
|
||||
lockdep_print_held_locks(current);
|
||||
printk("\nstack backtrace:\n");
|
||||
dump_stack();
|
||||
|
|
@ -4371,7 +4371,7 @@ retry:
|
|||
} while_each_thread(g, p);
|
||||
|
||||
printk("\n");
|
||||
printk("=============================================\n\n");
|
||||
pr_warn("=============================================\n\n");
|
||||
|
||||
if (unlock)
|
||||
read_unlock(&tasklist_lock);
|
||||
|
|
@ -4401,10 +4401,10 @@ asmlinkage __visible void lockdep_sys_exit(void)
|
|||
if (!debug_locks_off())
|
||||
return;
|
||||
printk("\n");
|
||||
printk("================================================\n");
|
||||
printk("[ BUG: lock held when returning to user space! ]\n");
|
||||
pr_warn("================================================\n");
|
||||
pr_warn("WARNING: lock held when returning to user space!\n");
|
||||
print_kernel_ident();
|
||||
printk("------------------------------------------------\n");
|
||||
pr_warn("------------------------------------------------\n");
|
||||
printk("%s/%d is leaving the kernel with locks still held!\n",
|
||||
curr->comm, curr->pid);
|
||||
lockdep_print_held_locks(curr);
|
||||
|
|
@ -4421,13 +4421,13 @@ void lockdep_rcu_suspicious(const char *file, const int line, const char *s)
|
|||
#endif /* #ifdef CONFIG_PROVE_RCU_REPEATEDLY */
|
||||
/* Note: the following can be executed concurrently, so be careful. */
|
||||
printk("\n");
|
||||
pr_err("===============================\n");
|
||||
pr_err("[ ERR: suspicious RCU usage. ]\n");
|
||||
pr_warn("=============================\n");
|
||||
pr_warn("WARNING: suspicious RCU usage\n");
|
||||
print_kernel_ident();
|
||||
pr_err("-------------------------------\n");
|
||||
pr_err("%s:%d %s!\n", file, line, s);
|
||||
pr_err("\nother info that might help us debug this:\n\n");
|
||||
pr_err("\n%srcu_scheduler_active = %d, debug_locks = %d\n",
|
||||
pr_warn("-----------------------------\n");
|
||||
printk("%s:%d %s!\n", file, line, s);
|
||||
printk("\nother info that might help us debug this:\n\n");
|
||||
printk("\n%srcu_scheduler_active = %d, debug_locks = %d\n",
|
||||
!rcu_lockdep_current_cpu_online()
|
||||
? "RCU used illegally from offline CPU!\n"
|
||||
: !rcu_is_watching()
|
||||
|
|
|
|||
|
|
@ -102,10 +102,11 @@ void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter)
|
|||
return;
|
||||
}
|
||||
|
||||
printk("\n============================================\n");
|
||||
printk( "[ BUG: circular locking deadlock detected! ]\n");
|
||||
printk("%s\n", print_tainted());
|
||||
printk( "--------------------------------------------\n");
|
||||
pr_warn("\n");
|
||||
pr_warn("============================================\n");
|
||||
pr_warn("WARNING: circular locking deadlock detected!\n");
|
||||
pr_warn("%s\n", print_tainted());
|
||||
pr_warn("--------------------------------------------\n");
|
||||
printk("%s/%d is deadlocking current task %s/%d\n\n",
|
||||
task->comm, task_pid_nr(task),
|
||||
current->comm, task_pid_nr(current));
|
||||
|
|
|
|||
Loading…
Reference in New Issue