lockdep, rtmutex, bug: Show taint flags on error
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>
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df754e6af2
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2 changed files with 16 additions and 8 deletions
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@ -567,11 +567,12 @@ static void lockdep_print_held_locks(struct task_struct *curr)
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}
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}
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}
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}
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static void print_kernel_version(void)
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static void print_kernel_ident(void)
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{
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{
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printk("%s %.*s\n", init_utsname()->release,
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printk("%s %.*s %s\n", init_utsname()->release,
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(int)strcspn(init_utsname()->version, " "),
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(int)strcspn(init_utsname()->version, " "),
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init_utsname()->version);
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init_utsname()->version,
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print_tainted());
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}
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}
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static int very_verbose(struct lock_class *class)
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static int very_verbose(struct lock_class *class)
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@ -1149,7 +1150,7 @@ print_circular_bug_header(struct lock_list *entry, unsigned int depth,
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printk("\n");
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printk("\n");
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printk("======================================================\n");
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printk("======================================================\n");
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printk("[ INFO: possible circular locking dependency detected ]\n");
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printk("[ INFO: possible circular locking dependency detected ]\n");
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print_kernel_version();
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print_kernel_ident();
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printk("-------------------------------------------------------\n");
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printk("-------------------------------------------------------\n");
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printk("%s/%d is trying to acquire lock:\n",
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printk("%s/%d is trying to acquire lock:\n",
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curr->comm, task_pid_nr(curr));
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curr->comm, task_pid_nr(curr));
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@ -1488,7 +1489,7 @@ print_bad_irq_dependency(struct task_struct *curr,
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printk("======================================================\n");
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printk("======================================================\n");
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printk("[ INFO: %s-safe -> %s-unsafe lock order detected ]\n",
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printk("[ INFO: %s-safe -> %s-unsafe lock order detected ]\n",
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irqclass, irqclass);
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irqclass, irqclass);
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print_kernel_version();
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print_kernel_ident();
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printk("------------------------------------------------------\n");
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printk("------------------------------------------------------\n");
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printk("%s/%d [HC%u[%lu]:SC%u[%lu]:HE%u:SE%u] is trying to acquire:\n",
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printk("%s/%d [HC%u[%lu]:SC%u[%lu]:HE%u:SE%u] is trying to acquire:\n",
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curr->comm, task_pid_nr(curr),
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curr->comm, task_pid_nr(curr),
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@ -1717,7 +1718,7 @@ print_deadlock_bug(struct task_struct *curr, struct held_lock *prev,
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printk("\n");
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printk("\n");
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printk("=============================================\n");
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printk("=============================================\n");
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printk("[ INFO: possible recursive locking detected ]\n");
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printk("[ INFO: possible recursive locking detected ]\n");
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print_kernel_version();
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print_kernel_ident();
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printk("---------------------------------------------\n");
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printk("---------------------------------------------\n");
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printk("%s/%d is trying to acquire lock:\n",
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printk("%s/%d is trying to acquire lock:\n",
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curr->comm, task_pid_nr(curr));
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curr->comm, task_pid_nr(curr));
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@ -2224,7 +2225,7 @@ print_usage_bug(struct task_struct *curr, struct held_lock *this,
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printk("\n");
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printk("\n");
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printk("=================================\n");
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printk("=================================\n");
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printk("[ INFO: inconsistent lock state ]\n");
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printk("[ INFO: inconsistent lock state ]\n");
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print_kernel_version();
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print_kernel_ident();
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printk("---------------------------------\n");
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printk("---------------------------------\n");
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printk("inconsistent {%s} -> {%s} usage.\n",
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printk("inconsistent {%s} -> {%s} usage.\n",
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@ -2289,7 +2290,7 @@ print_irq_inversion_bug(struct task_struct *curr,
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printk("\n");
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printk("\n");
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printk("=========================================================\n");
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printk("=========================================================\n");
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printk("[ INFO: possible irq lock inversion dependency detected ]\n");
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printk("[ INFO: possible irq lock inversion dependency detected ]\n");
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print_kernel_version();
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print_kernel_ident();
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printk("---------------------------------------------------------\n");
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printk("---------------------------------------------------------\n");
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printk("%s/%d just changed the state of lock:\n",
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printk("%s/%d just changed the state of lock:\n",
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curr->comm, task_pid_nr(curr));
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curr->comm, task_pid_nr(curr));
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@ -3170,6 +3171,7 @@ print_unlock_inbalance_bug(struct task_struct *curr, struct lockdep_map *lock,
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printk("\n");
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printk("\n");
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printk("=====================================\n");
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printk("=====================================\n");
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printk("[ BUG: bad unlock balance detected! ]\n");
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printk("[ BUG: bad unlock balance detected! ]\n");
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print_kernel_ident();
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printk("-------------------------------------\n");
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printk("-------------------------------------\n");
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printk("%s/%d is trying to release lock (",
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printk("%s/%d is trying to release lock (",
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curr->comm, task_pid_nr(curr));
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curr->comm, task_pid_nr(curr));
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@ -3614,6 +3616,7 @@ print_lock_contention_bug(struct task_struct *curr, struct lockdep_map *lock,
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printk("\n");
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printk("\n");
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printk("=================================\n");
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printk("=================================\n");
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printk("[ BUG: bad contention detected! ]\n");
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printk("[ BUG: bad contention detected! ]\n");
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print_kernel_ident();
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printk("---------------------------------\n");
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printk("---------------------------------\n");
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printk("%s/%d is trying to contend lock (",
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printk("%s/%d is trying to contend lock (",
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curr->comm, task_pid_nr(curr));
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curr->comm, task_pid_nr(curr));
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@ -3988,6 +3991,7 @@ print_freed_lock_bug(struct task_struct *curr, const void *mem_from,
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printk("\n");
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printk("\n");
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printk("=========================\n");
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printk("=========================\n");
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printk("[ BUG: held lock freed! ]\n");
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printk("[ BUG: held lock freed! ]\n");
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print_kernel_ident();
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printk("-------------------------\n");
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printk("-------------------------\n");
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printk("%s/%d is freeing memory %p-%p, with a lock still held there!\n",
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printk("%s/%d is freeing memory %p-%p, with a lock still held there!\n",
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curr->comm, task_pid_nr(curr), mem_from, mem_to-1);
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curr->comm, task_pid_nr(curr), mem_from, mem_to-1);
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@ -4045,6 +4049,7 @@ static void print_held_locks_bug(struct task_struct *curr)
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printk("\n");
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printk("\n");
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printk("=====================================\n");
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printk("=====================================\n");
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printk("[ BUG: lock held at task exit time! ]\n");
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printk("[ BUG: lock held at task exit time! ]\n");
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print_kernel_ident();
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printk("-------------------------------------\n");
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printk("-------------------------------------\n");
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printk("%s/%d is exiting with locks still held!\n",
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printk("%s/%d is exiting with locks still held!\n",
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curr->comm, task_pid_nr(curr));
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curr->comm, task_pid_nr(curr));
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@ -4142,6 +4147,7 @@ void lockdep_sys_exit(void)
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printk("\n");
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printk("\n");
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printk("================================================\n");
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printk("================================================\n");
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printk("[ BUG: lock held when returning to user space! ]\n");
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printk("[ BUG: lock held when returning to user space! ]\n");
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print_kernel_ident();
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printk("------------------------------------------------\n");
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printk("------------------------------------------------\n");
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printk("%s/%d is leaving the kernel with locks still held!\n",
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printk("%s/%d is leaving the kernel with locks still held!\n",
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curr->comm, curr->pid);
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curr->comm, curr->pid);
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@ -4161,6 +4167,7 @@ void lockdep_rcu_suspicious(const char *file, const int line, const char *s)
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printk("\n");
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printk("\n");
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printk("===============================\n");
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printk("===============================\n");
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printk("[ INFO: suspicious RCU usage. ]\n");
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printk("[ INFO: suspicious RCU usage. ]\n");
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print_kernel_ident();
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printk("-------------------------------\n");
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printk("-------------------------------\n");
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printk("%s:%d %s!\n", file, line, s);
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printk("%s:%d %s!\n", file, line, s);
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printk("\nother info that might help us debug this:\n\n");
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printk("\nother info that might help us debug this:\n\n");
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@ -101,6 +101,7 @@ void debug_rt_mutex_print_deadlock(struct rt_mutex_waiter *waiter)
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printk("\n============================================\n");
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printk("\n============================================\n");
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printk( "[ BUG: circular locking deadlock detected! ]\n");
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printk( "[ BUG: circular locking deadlock detected! ]\n");
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printk("%s\n", print_tainted());
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printk( "--------------------------------------------\n");
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printk( "--------------------------------------------\n");
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printk("%s/%d is deadlocking current task %s/%d\n\n",
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printk("%s/%d is deadlocking current task %s/%d\n\n",
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task->comm, task_pid_nr(task),
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task->comm, task_pid_nr(task),
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