36 /* buffer for owner stacktrace */
44 /* a map for tracing owner stacktrace to owner stack id */
47 	__uint(key_size, sizeof(__u64)); // owner stacktrace
48 	__uint(value_size, sizeof(__s32)); // owner stack id
52 /* a map for tracing lock address to owner data */
60 /* a map for contention_key (stores owner stack id) to contention data */
163 	struct task_struct *owner;  member
167 	atomic_long_t owner;  member
329 	__u64 owner = 0;  in get_lock_owner()  local
333 		owner = BPF_CORE_READ(mutex, owner.counter);  in get_lock_owner()
344 			owner = (unsigned long)BPF_CORE_READ(rwsem, owner);  in get_lock_owner()
347 			owner = BPF_CORE_READ(rwsem, owner.counter);  in get_lock_owner()
352 		owner = BPF_CORE_READ(rwsem, owner.counter);  in get_lock_owner()
356 	if (!owner)  in get_lock_owner()
359 	task = (void *)(owner & ~7UL);  in get_lock_owner()
595 			 * The owner is the same, but stacktrace might be changed. In this case we  in contention_begin()
596 			 * store/update `owner_stat` based on current owner stack id.  in contention_begin()
617 			/* The flags is not used anymore.  Pass the owner pid. */  in contention_begin()
691 		 * Contention is still ongoing, with a new owner (current task). `owner_data`  in contention_end()
711 			 * acquiring it. Owner is not changed, but we still need to update the owner  in contention_end()
732 				 * If owner stack is changed, update owner stack id for this lock.  in contention_end()
739 			 * owner.  in contention_end()