trace: Add an option to show tgids in trace output

[firefly-linux-kernel-4.4.55.git] / kernel / trace / trace_output.c

diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 282982195e09ff40ad23f3ab1dca7e572c0ab8e6..a2fc60a74e278588b6bad0c9a5f337c97977a102 100644 (file)
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -526,11 +526,21 @@ int trace_print_context(struct trace_iterator *iter)
        unsigned long long t;
        unsigned long secs, usec_rem;
        char comm[TASK_COMM_LEN];
+       int tgid;
 
        trace_find_cmdline(entry->pid, comm);
 
-       trace_seq_printf(s, "%16s-%-5d [%03d] ",
-                              comm, entry->pid, iter->cpu);
+       trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid);
+
+       if (tr->trace_flags & TRACE_ITER_TGID) {
+               tgid = trace_find_tgid(entry->pid);
+               if (tgid < 0)
+                       trace_seq_puts(s, "(-----) ");
+               else
+                       trace_seq_printf(s, "(%5d) ", tgid);
+       }
+
+       trace_seq_printf(s, "[%03d] ", iter->cpu);
 
        if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
                trace_print_lat_fmt(s, entry);