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lockdep, rtmutex, bug: Show taint flags on error

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Show the taint flags in all lockdep and rtmutex-debug error messages.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1319773015.6759.30.camel@deadeye
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ben Hutchings 2011-10-28 04:36:55 +01:00 committed by Ingo Molnar
parent df754e6af2
commit fbdc4b9a6c
2 changed files with 16 additions and 8 deletions
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23
kernel/lockdep.c
View file

@ -567,11 +567,12 @@ static void lockdep_print_held_locks(struct task_struct *curr)
}
}
static void print_kernel_version(void)
static void print_kernel_ident(void)
{
printk("%s %.*s\n", init_utsname()->release,
printk("%s %.*s %s\n", init_utsname()->release,
(int)strcspn(init_utsname()->version, " "),
init_utsname()->version);
init_utsname()->version,
print_tainted());
}
static int very_verbose(struct lock_class *class)
@ -1149,7 +1150,7 @@ print_circular_bug_header(struct lock_list *entry, unsigned int depth,
printk("\n");
printk("======================================================\n");
printk("[ INFO: possible circular locking dependency detected ]\n");
print_kernel_version();
print_kernel_ident();
printk("-------------------------------------------------------\n");
printk("%s/%d is trying to acquire lock:\n",
curr->comm, task_pid_nr(curr));
@ -1488,7 +1489,7 @@ print_bad_irq_dependency(struct task_struct *curr,
printk("======================================================\n");
printk("[ INFO: %s-safe -> %s-unsafe lock order detected ]\n",
irqclass, irqclass);
print_kernel_version();
print_kernel_ident();
printk("------------------------------------------------------\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),
@ -1717,7 +1718,7 @@ print_deadlock_bug(struct task_struct *curr, struct held_lock *prev,
printk("\n");
printk("=============================================\n");
printk("[ INFO: possible recursive locking detected ]\n");
print_kernel_version();
print_kernel_ident();
printk("---------------------------------------------\n");
printk("%s/%d is trying to acquire lock:\n",
curr->comm, task_pid_nr(curr));
@ -2224,7 +2225,7 @@ print_usage_bug(struct task_struct *curr, struct held_lock *this,
printk("\n");
printk("=================================\n");
printk("[ INFO: inconsistent lock state ]\n");
print_kernel_version();
print_kernel_ident();
printk("---------------------------------\n");
printk("inconsistent {%s} -> {%s} usage.\n",
@ -2289,7 +2290,7 @@ print_irq_inversion_bug(struct task_struct *curr,
printk("\n");
printk("=========================================================\n");
printk("[ INFO: possible irq lock inversion dependency detected ]\n");
print_kernel_version();
print_kernel_ident();
printk("---------------------------------------------------------\n");
printk("%s/%d just changed the state of lock:\n",
curr->comm, task_pid_nr(curr));
@ -3170,6 +3171,7 @@ print_unlock_inbalance_bug(struct task_struct *curr, struct lockdep_map *lock,
printk("\n");
printk("=====================================\n");
printk("[ BUG: bad unlock balance detected! ]\n");
print_kernel_ident();
printk("-------------------------------------\n");
printk("%s/%d is trying to release lock (",
curr->comm, task_pid_nr(curr));
@ -3614,6 +3616,7 @@ print_lock_contention_bug(struct task_struct *curr, struct lockdep_map *lock,
printk("\n");
printk("=================================\n");
printk("[ BUG: bad contention detected! ]\n");
print_kernel_ident();
printk("---------------------------------\n");
printk("%s/%d is trying to contend lock (",
curr->comm, task_pid_nr(curr));
@ -3988,6 +3991,7 @@ print_freed_lock_bug(struct task_struct *curr, const void *mem_from,
printk("\n");
printk("=========================\n");
printk("[ BUG: held lock freed! ]\n");
print_kernel_ident();
printk("-------------------------\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);
@ -4045,6 +4049,7 @@ static void print_held_locks_bug(struct task_struct *curr)
printk("\n");
printk("=====================================\n");
printk("[ BUG: lock held at task exit time! ]\n");
print_kernel_ident();
printk("-------------------------------------\n");
printk("%s/%d is exiting with locks still held!\n",
curr->comm, task_pid_nr(curr));
@ -4142,6 +4147,7 @@ void lockdep_sys_exit(void)
printk("\n");
printk("================================================\n");
printk("[ BUG: lock held when returning to user space! ]\n");
print_kernel_ident();
printk("------------------------------------------------\n");
printk("%s/%d is leaving the kernel with locks still held!\n",
curr->comm, curr->pid);
@ -4161,6 +4167,7 @@ void lockdep_rcu_suspicious(const char *file, const int line, const char *s)
printk("\n");
printk("===============================\n");
printk("[ INFO: suspicious RCU usage. ]\n");
print_kernel_ident();
printk("-------------------------------\n");
printk("%s:%d %s!\n", file, line, s);
printk("\nother info that might help us debug this:\n\n");

1
kernel/rtmutex-debug.c
View file

@ -101,6 +101,7 @@ void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter)
printk("\n============================================\n");
printk( "[ BUG: circular locking deadlock detected! ]\n");
printk("%s\n", print_tainted());
printk( "--------------------------------------------\n");
printk("%s/%d is deadlocking current task %s/%d\n\n",
task->comm, task_pid_nr(task),