Messages in this thread Patch in this message | | | From | Waiman Long <> | Subject | [PATCH 3/5] locking/lockdep: Track number of zapped lock chains | Date | Thu, 12 Dec 2019 17:35:23 -0500 |
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Add a new counter nr_zapped_lock_chains to track the number lock chains that have been removed.
Signed-off-by: Waiman Long <longman@redhat.com> --- kernel/locking/lockdep.c | 2 ++ kernel/locking/lockdep_internals.h | 1 + kernel/locking/lockdep_proc.c | 2 ++ 3 files changed, 5 insertions(+)
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index d03503b348f1..b543bcc5ff50 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -2625,6 +2625,7 @@ check_prevs_add(struct task_struct *curr, struct held_lock *next) struct lock_chain lock_chains[MAX_LOCKDEP_CHAINS]; static DECLARE_BITMAP(lock_chains_in_use, MAX_LOCKDEP_CHAINS); static u16 chain_hlocks[MAX_LOCKDEP_CHAIN_HLOCKS]; +unsigned long nr_zapped_lock_chains; unsigned int nr_chain_hlocks; unsigned int nr_leaked_chain_hlocks; @@ -4797,6 +4798,7 @@ static void remove_class_from_lock_chain(struct pending_free *pf, */ hlist_del_rcu(&chain->entry); __set_bit(chain - lock_chains, pf->lock_chains_being_freed); + nr_zapped_lock_chains++; #endif } diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h index b6ec9595ae88..4c23ab7d27c2 100644 --- a/kernel/locking/lockdep_internals.h +++ b/kernel/locking/lockdep_internals.h @@ -125,6 +125,7 @@ struct lock_class *lock_chain_get_class(struct lock_chain *chain, int i); extern unsigned long nr_lock_classes; extern unsigned long nr_zapped_classes; +extern unsigned long nr_zapped_lock_chains; extern unsigned long nr_list_entries; long lockdep_next_lockchain(long i); unsigned long lock_chain_count(void); diff --git a/kernel/locking/lockdep_proc.c b/kernel/locking/lockdep_proc.c index aab524530115..65a1b96238ef 100644 --- a/kernel/locking/lockdep_proc.c +++ b/kernel/locking/lockdep_proc.c @@ -345,6 +345,8 @@ static int lockdep_stats_show(struct seq_file *m, void *v) seq_puts(m, "\n"); seq_printf(m, " zapped classes: %11lu\n", nr_zapped_classes); + seq_printf(m, " zapped lock chains: %11lu\n", + nr_zapped_lock_chains); seq_printf(m, " leaked chain hlocks: %11u\n", nr_leaked_chain_hlocks); return 0; -- 2.18.1
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