path: root/kernel
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authorSteven Rostedt (VMware) <>2021-06-17 14:32:34 -0400
committerSteven Rostedt (VMware) <>2021-06-18 09:10:00 -0400
commit4fdd595e4f9a1ff6d93ec702eaecae451cfc6591 (patch)
tree5739300e548b60b8286f3b10dbb61a331940d176 /kernel
parent85550c83da421fb12dc1816c45012e1e638d2b38 (diff)
tracing: Do not stop recording comms if the trace file is being read
A while ago, when the "trace" file was opened, tracing was stopped, and code was added to stop recording the comms to saved_cmdlines, for mapping of the pids to the task name. Code has been added that only records the comm if a trace event occurred, and there's no reason to not trace it if the trace file is opened. Cc: Fixes: 7ffbd48d5cab2 ("tracing: Cache comms only after an event occurred") Signed-off-by: Steven Rostedt (VMware) <>
Diffstat (limited to 'kernel')
1 files changed, 0 insertions, 9 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index e220b37e29c6..d23a09d3eb37 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2198,9 +2198,6 @@ struct saved_cmdlines_buffer {
static struct saved_cmdlines_buffer *savedcmd;
-/* temporary disable recording */
-static atomic_t trace_record_taskinfo_disabled __read_mostly;
static inline char *get_saved_cmdlines(int idx)
return &savedcmd->saved_cmdlines[idx * TASK_COMM_LEN];
@@ -3996,9 +3993,6 @@ static void *s_start(struct seq_file *m, loff_t *pos)
return ERR_PTR(-EBUSY);
- if (!iter->snapshot)
- atomic_inc(&trace_record_taskinfo_disabled);
if (*pos != iter->pos) {
iter->ent = NULL;
iter->cpu = 0;
@@ -4041,9 +4035,6 @@ static void s_stop(struct seq_file *m, void *p)
- if (!iter->snapshot)
- atomic_dec(&trace_record_taskinfo_disabled);