參考

• https://patchwork.kernel.org/project/linux-trace-kernel/patch/20230306122549.236561-1-douglas.raillard@arm.com/#25471294

現象

I/perfetto( 3707):            probes.cc:65 Hard resetting ftrace state.                                                                                                                                    
I/perfetto( 3710):           probes.cc:104 Starting /system/bin/traced_probes service                                                                                                                      
I/perfetto( 3710): _activity_trigger.cc:71 mm_events ftrace instance not found. Triggering of traces on memory pressure will not be available on this device.                                              
I/perfetto( 3710):  probes_producer.cc:311 Connected to the service                                                                                                                                        
E/perfetto( 3710): ranslation_table.cc:133 Failed to infer ftrace field type for "f2fs_truncate_partial_nodes.nid" (type:"nid_t nid[3]" size:12 signed:0) (errno: 2, No such file or directory) 

參考

回退下面的修改：

diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 31d994e6b4ca..8d053838d6cf 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -512,7 +512,7 @@  TRACE_EVENT(f2fs_truncate_partial_nodes,
 	TP_STRUCT__entry(
 		__field(dev_t,	dev)
 		__field(ino_t,	ino)
-		__field(nid_t,	nid[3])
+		__array(nid_t,	nid, 3)
 		__field(int,	depth)
 		__field(int,	err)
 	),