From 4fea355eb2254754b2e522d87d81c5562252116a Mon Sep 17 00:00:00 2001
From: jhb <jhb@FreeBSD.org>
Date: Thu, 8 Mar 2012 19:41:05 +0000
Subject: Add a new sched_clear_name() method to the scheduler interface to
 clear the cached name used for KTR_SCHED traces when a thread's name changes.
 This way KTR_SCHED traces (and thus schedgraph) will notice when a thread's
 name changes, most commonly via execve().

MFC after:	2 weeks
---
 sys/kern/kern_exec.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'sys/kern/kern_exec.c')

diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c
index 135f798..dac4703 100644
--- a/sys/kern/kern_exec.c
+++ b/sys/kern/kern_exec.c
@@ -57,6 +57,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/pioctl.h>
 #include <sys/namei.h>
 #include <sys/resourcevar.h>
+#include <sys/sched.h>
 #include <sys/sdt.h>
 #include <sys/sf_buf.h>
 #include <sys/syscallsubr.h>
@@ -636,6 +637,9 @@ interpret:
 	else if (vn_commname(binvp, p->p_comm, sizeof(p->p_comm)) != 0)
 		bcopy(fexecv_proc_title, p->p_comm, sizeof(fexecv_proc_title));
 	bcopy(p->p_comm, td->td_name, sizeof(td->td_name));
+#ifdef KTR
+	sched_clear_tdname(td);
+#endif
 
 	/*
 	 * mark as execed, wakeup the process that vforked (if any) and tell
-- 
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