From 49a4e3b4b45f8d1fac11d9ce659d9c9193d00e3f Mon Sep 17 00:00:00 2001
From: Colin Percival <cperciva@FreeBSD.org>
Date: Sun, 31 Dec 2017 09:24:11 +0000
Subject: [PATCH] Instrument thread creations for the the benefit of the TSLOG
 framework. This assists in tracking time spent while the boot is being "held"
 waiting for something to happen.

---
 sys/kern/kern_kthread.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/kern/kern_kthread.c b/sys/kern/kern_kthread.c
index 05762cdae7dc..ae7eef5ff07d 100644
--- a/sys/kern/kern_kthread.c
+++ b/sys/kern/kern_kthread.c
@@ -44,6 +44,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/unistd.h>
 #include <sys/wait.h>
 #include <sys/sched.h>
+#include <sys/tslog.h>
 #include <vm/vm.h>
 #include <vm/vm_extern.h>
 
@@ -124,6 +125,7 @@ kproc_create(void (*func)(void *), void *arg,
 #ifdef KTR
 	sched_clear_tdname(td);
 #endif
+	TSTHREAD(td, td->td_name);
 
 	/* call the processes' main()... */
 	cpu_fork_kthread_handler(td, func, arg);
@@ -283,6 +285,8 @@ kthread_add(void (*func)(void *), void *arg, struct proc *p,
 	vsnprintf(newtd->td_name, sizeof(newtd->td_name), fmt, ap);
 	va_end(ap);
 
+	TSTHREAD(newtd, newtd->td_name);
+
 	newtd->td_proc = p;  /* needed for cpu_copy_thread */
 	/* might be further optimized for kthread */
 	cpu_copy_thread(newtd, oldtd);