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lockdep: add lock_class information to lock_chain and output it

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It is based on x86/master branch of git-x86 tree, and has been tested
on x86_64 platform.

ChangeLog:

v2:

- Enclosing proc file system related code into CONFIG_PROVE_LOCKING.

- Fix nr_chain_hlocks update code.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Huang, Ying 2008-06-23 11:20:54 +08:00 • committed by Ingo Molnar
parent 443cd507ce
commit cd1a28e845
3 changed files with 17 additions and 7 deletions
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6
kernel/lockdep_proc.c
View file

@ -178,6 +178,7 @@ static const struct file_operations proc_lockdep_operations = {
.release = seq_release,
};
#ifdef CONFIG_PROVE_LOCKING
static void *lc_next(struct seq_file *m, void *v, loff_t *pos)
{
struct lock_chain *chain;
@ -264,6 +265,7 @@ static const struct file_operations proc_lockdep_chains_operations = {
.llseek = seq_lseek,
.release = seq_release,
};
#endif /* CONFIG_PROVE_LOCKING */
static void lockdep_stats_debug_show(struct seq_file *m)
{
@ -382,7 +384,7 @@ static int lockdep_stats_show(struct seq_file *m, void *v)
seq_printf(m, " dependency chains: %11lu [max: %lu]\n",
nr_lock_chains, MAX_LOCKDEP_CHAINS);
seq_printf(m, " dependency chain hlocks: %11d [max: %lu]\n",
atomic_read(&nr_chain_hlocks), MAX_LOCKDEP_CHAIN_HLOCKS);
nr_chain_hlocks, MAX_LOCKDEP_CHAIN_HLOCKS);
#endif
#ifdef CONFIG_TRACE_IRQFLAGS
@ -750,8 +752,10 @@ static const struct file_operations proc_lock_stat_operations = {
static int __init lockdep_proc_init(void)
{
proc_create("lockdep", S_IRUSR, NULL, &proc_lockdep_operations);
#ifdef CONFIG_PROVE_LOCKING
proc_create("lockdep_chains", S_IRUSR, NULL,
&proc_lockdep_chains_operations);
#endif
proc_create("lockdep_stats", S_IRUSR, NULL,
&proc_lockdep_stats_operations);