Messages in this thread Patch in this message | | | From | Waiman Long <> | Subject | [PATCH v4 5/7] locking/lockdep: Track number of zapped lock chains | Date | Tue, 21 Jan 2020 10:40:07 -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 a259f9e97e3b..97ec0786dbda 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -2627,6 +2627,7 @@ 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; struct lock_class *lock_chain_get_class(struct lock_chain *chain, int i) @@ -4798,6 +4799,7 @@ 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 926bfa4b4564..af722ceeda33 100644 --- a/kernel/locking/lockdep_internals.h +++ b/kernel/locking/lockdep_internals.h @@ -131,6 +131,7 @@ 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 2457bc97924c..df1b97912871 100644 --- a/kernel/locking/lockdep_proc.c +++ b/kernel/locking/lockdep_proc.c @@ -349,6 +349,8 @@ 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); return 0; } -- 2.18.1
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