tree 0237ea48b63511fa3825b288c6f0d298eeb36c7c
parent 1de94b52d5e8d8b32f0252f14fad1f1edc2e71f1
author Steven Rostedt (Google) <rostedt@goodmis.org> 1694619388 -0400
committer Steven Rostedt (Google) <rostedt@goodmis.org> 1704651809 -0500

tracefs: Add show_events_dentries

Add a file in tracefs that shows the "events" allocated entries and the
dentries that are attached to them. This is used to see what dentries have
been dynamically allocated as well as their current ref counts.

 ~# cat /sys/kernel/tracing/events/sched/sched_switch/enable
 0
 ~# grep -A4 sched_switch /sys/kernel/tracing/show_events_dentries
 sched_switch/ dentry: (1)
 enable dentry: (0)
 id
 filter
 trigger

The first value is the name of the file or directory. If a dentry is
allocated, then a "dentry: (<ref-count>)" is displayed showing the address
of the dentry as well as its ref count.

Link: https://lore.kernel.org/linux-trace-kernel/20230913113628.172907b7@gandalf.local.home

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mark Rutland  <mark.rutland@arm.com>
Cc: Ajay Kaher <akaher@vmware.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>