diff options
| author | Steven Rostedt (VMware) | 2021-09-23 21:03:49 -0400 |
|---|---|---|
| committer | Steven Rostedt (VMware) | 2021-10-05 17:30:08 -0400 |
| commit | 6954e415264eeb5ee6be0d22d789ad12c995ee64 (patch) | |
| tree | 12da7d7dafca9da48f6b42d917a24ff84244f0f1 /kernel/trace/trace_events.c | |
| parent | bf094cffea2a6503ce84062f9f0243bef77c58f9 (diff) | |
tracing: Place trace_pid_list logic into abstract functions
Instead of having the logic that does trace_pid_list open coded, wrap it in
abstract functions. This will allow a rewrite of the logic that implements
the trace_pid_list without affecting the users.
Note, this causes a change in behavior. Every time a pid is written into
the set_*_pid file, it creates a new list and uses RCU to update it. If
pid_max is lowered, but there was a pid currently in the list that was
higher than pid_max, those pids will now be removed on updating the list.
The old behavior kept that from happening.
The rewrite of the pid_list logic will no longer depend on pid_max,
and will return the old behavior.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events.c')
| -rw-r--r-- | kernel/trace/trace_events.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 830b3b9940f4..bf54d2803261 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -885,10 +885,10 @@ static void __ftrace_clear_event_pids(struct trace_array *tr, int type) tracepoint_synchronize_unregister(); if ((type & TRACE_PIDS) && pid_list) - trace_free_pid_list(pid_list); + trace_pid_list_free(pid_list); if ((type & TRACE_NO_PIDS) && no_pid_list) - trace_free_pid_list(no_pid_list); + trace_pid_list_free(no_pid_list); } static void ftrace_clear_event_pids(struct trace_array *tr, int type) @@ -1967,7 +1967,7 @@ event_pid_write(struct file *filp, const char __user *ubuf, if (filtered_pids) { tracepoint_synchronize_unregister(); - trace_free_pid_list(filtered_pids); + trace_pid_list_free(filtered_pids); } else if (pid_list && !other_pids) { register_pid_events(tr); } |