---
 include/linux/logdev_marker.h  |    2 ++
 kernel/logdev/logdev_tracers.c |   27 +++++++++++++++++++++++++++
 kernel/posix-timers.c          |    3 +++
 3 files changed, 32 insertions(+)

Index: linux-2.6.21.5-rt20/include/linux/logdev_marker.h
===================================================================
--- linux-2.6.21.5-rt20.orig/include/linux/logdev_marker.h	2007-07-13 16:44:28.000000000 +0200
+++ linux-2.6.21.5-rt20/include/linux/logdev_marker.h	2007-07-13 16:47:35.000000000 +0200
@@ -56,6 +56,8 @@
 void LDCALLER(context_switch) (struct task_struct *prev,
 			       struct task_struct *next);
 
+void LDCALLER(sys_clock_getres) (const clockid_t which_clock);
+
 
 #endif /* CONFIG_LOGDEV_TRACING */
 
Index: linux-2.6.21.5-rt20/kernel/logdev/logdev_tracers.c
===================================================================
--- linux-2.6.21.5-rt20.orig/kernel/logdev/logdev_tracers.c	2007-07-13 16:44:40.000000000 +0200
+++ linux-2.6.21.5-rt20/kernel/logdev/logdev_tracers.c	2007-07-13 17:16:23.000000000 +0200
@@ -41,6 +41,7 @@ struct logdev_mark_hdr {
 #define LOGMARK_E_ID(x) ((LOGMARK_EXAMPLE_ID << 16)|(x))
 
 #define LOGMARK_CNTXTSW		LOGMARK_E_ID(1)
+#define LOGMARK_GETRES		LOGMARK_E_ID(3)
 
 struct logdev_mark_switch {
 	struct logdev_mark_hdr hdr;
@@ -59,6 +60,12 @@ struct logdev_mark_switch {
 	char next_comm[TASK_COMM_LEN];
 };
 
+struct logdev_mark_getres {
+	struct logdev_mark_hdr hdr;
+	short pid;
+	clockid_t clock;
+	char comm[TASK_COMM_LEN];
+};
 
 /* ---------------- end of user space custom headers ---------------- */
 
@@ -169,6 +176,26 @@ void __kprobes LDCALLER(context_switch) 
 		      &lm, sizeof(lm), NULL);
 }
 
+void LDCALLER(sys_clock_getres) (const clockid_t which_clock)
+{
+	struct logdev_mark_getres lm;
+
+	/* Filter on task */
+	if (strncmp(current->comm, "sched_football", 14) != 0)
+		return;
+
+
+	logmark_hdr(&lm.hdr, LOGMARK_GETRES);
+	lm.pid = current->pid;
+	lm.clock = which_clock;
+	memcpy(lm.comm, current->comm, TASK_COMM_LEN);
+
+	logdev_record(LOGMARK_ID_MARK, sizeof(lm),
+		      &lm, sizeof(lm), NULL);
+}
+
+
+
 static int __init logdev_tracer_init(void)
 {
 	logdev_register_callback(LOGMARK_ID_MARK, logdev_mark_callback);
Index: linux-2.6.21.5-rt20/kernel/posix-timers.c
===================================================================
--- linux-2.6.21.5-rt20.orig/kernel/posix-timers.c	2007-07-13 16:44:12.000000000 +0200
+++ linux-2.6.21.5-rt20/kernel/posix-timers.c	2007-07-13 16:46:33.000000000 +0200
@@ -48,6 +48,7 @@
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 #include <linux/module.h>
+#include <linux/logdev_marker.h>
 
 /*
  * Management arrays for POSIX timers.	 Timers are kept in slab memory
@@ -964,6 +965,8 @@ sys_clock_getres(const clockid_t which_c
 	struct timespec rtn_tp;
 	int error;
 
+	LD_MARK1(sys_clock_getres, which_clock);
+
 	if (invalid_clockid(which_clock))
 		return -EINVAL;