From: Waiman Long Date: Thu, 6 Feb 2020 15:24:07 +0000 (-0500) Subject: locking/lockdep: Track number of zapped lock chains X-Git-Tag: v5.15~4235^2~44 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=797b82eb906eeba24dcd6e9ab92faef01fc684cb;p=platform%2Fkernel%2Flinux-starfive.git locking/lockdep: Track number of zapped lock chains Add a new counter nr_zapped_lock_chains to track the number lock chains that have been removed. Signed-off-by: Waiman Long Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Link: https://lkml.kernel.org/r/20200206152408.24165-6-longman@redhat.com --- diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index ef2a643..a63976c 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -2626,6 +2626,7 @@ out_bug: 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) @@ -4797,6 +4798,7 @@ free_lock_chain: */ 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 926bfa4..af722ce 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 53c2a2a..524580d 100644 --- a/kernel/locking/lockdep_proc.c +++ b/kernel/locking/lockdep_proc.c @@ -349,6 +349,10 @@ 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); +#ifdef CONFIG_PROVE_LOCKING + seq_printf(m, " zapped lock chains: %11lu\n", + nr_zapped_lock_chains); +#endif return 0; }