5 files changed, 16 insertions, 11 deletions
diff --git a/sys/kern/kern_ntptime.c b/sys/kern/kern_ntptime.c
index 1e56acf..2669a54 100644
--- a/sys/kern/kern_ntptime.c
+++ b/sys/kern/kern_ntptime.c
@@ -301,13 +301,17 @@ SYSCTL_PROC(_kern_ntp_pll, OID_AUTO, gettime, CTLTYPE_OPAQUE|CTLFLAG_RD,
 	0, sizeof(struct ntptimeval) , ntp_sysctl, "S,ntptimeval", "");
 
 #ifdef PPS_SYNC
-SYSCTL_INT(_kern_ntp_pll, OID_AUTO, pps_shiftmax, CTLFLAG_RW, &pps_shiftmax, 0, "");
-SYSCTL_INT(_kern_ntp_pll, OID_AUTO, pps_shift, CTLFLAG_RW, &pps_shift, 0, "");
+SYSCTL_INT(_kern_ntp_pll, OID_AUTO, pps_shiftmax, CTLFLAG_RW,
+    &pps_shiftmax, 0, "Max interval duration (sec) (shift)");
+SYSCTL_INT(_kern_ntp_pll, OID_AUTO, pps_shift, CTLFLAG_RW,
+    &pps_shift, 0, "Interval duration (sec) (shift)");
 SYSCTL_LONG(_kern_ntp_pll, OID_AUTO, time_monitor, CTLFLAG_RD,
-    &time_monitor, 0, "");
+    &time_monitor, 0, "Last time offset scaled (ns)");
 
-SYSCTL_OPAQUE(_kern_ntp_pll, OID_AUTO, pps_freq, CTLFLAG_RD, &pps_freq, sizeof(pps_freq), "I", "");
-SYSCTL_OPAQUE(_kern_ntp_pll, OID_AUTO, time_freq, CTLFLAG_RD, &time_freq, sizeof(time_freq), "I", "");
+SYSCTL_OPAQUE(_kern_ntp_pll, OID_AUTO, pps_freq, CTLFLAG_RD,
+    &pps_freq, sizeof(pps_freq), "I", "Scaled frequency offset (ns/sec)");
+SYSCTL_OPAQUE(_kern_ntp_pll, OID_AUTO, time_freq, CTLFLAG_RD,
+    &time_freq, sizeof(time_freq), "I", "Frequency offset (ns/sec)");
 #endif
 
 /*
diff --git a/sys/kern/kern_shutdown.c b/sys/kern/kern_shutdown.c
index 518fe4b..90a74b8 100644
--- a/sys/kern/kern_shutdown.c
+++ b/sys/kern/kern_shutdown.c
@@ -651,7 +651,7 @@ panic(const char *fmt, ...)
 static int poweroff_delay = POWEROFF_DELAY;
 
 SYSCTL_INT(_kern_shutdown, OID_AUTO, poweroff_delay, CTLFLAG_RW,
-	&poweroff_delay, 0, "");
+    &poweroff_delay, 0, "Delay before poweroff to write disk caches (msec)");
 
 static void
 poweroff_wait(void *junk, int howto)
@@ -671,7 +671,7 @@ poweroff_wait(void *junk, int howto)
  */
 static int kproc_shutdown_wait = 60;
 SYSCTL_INT(_kern_shutdown, OID_AUTO, kproc_shutdown_wait, CTLFLAG_RW,
-    &kproc_shutdown_wait, 0, "");
+    &kproc_shutdown_wait, 0, "Max wait time (sec) to stop for each process");
 
 void
 kproc_shutdown(void *arg, int howto)
diff --git a/sys/kern/kern_thr.c b/sys/kern/kern_thr.c
index 24c6cfd..a5d9692 100644
--- a/sys/kern/kern_thr.c
+++ b/sys/kern/kern_thr.c
@@ -63,11 +63,11 @@ static SYSCTL_NODE(_kern, OID_AUTO, threads, CTLFLAG_RW, 0,
 
 static int max_threads_per_proc = 1500;
 SYSCTL_INT(_kern_threads, OID_AUTO, max_threads_per_proc, CTLFLAG_RW,
-	&max_threads_per_proc, 0, "Limit on threads per proc");
+    &max_threads_per_proc, 0, "Limit on threads per proc");
 
 static int max_threads_hits;
 SYSCTL_INT(_kern_threads, OID_AUTO, max_threads_hits, CTLFLAG_RD,
-	&max_threads_hits, 0, "");
+    &max_threads_hits, 0, "kern.threads.max_threads_per_proc hit count");
 
 #ifdef COMPAT_FREEBSD32
 
diff --git a/sys/kern/uipc_sockbuf.c b/sys/kern/uipc_sockbuf.c
index 551afac..272f939 100644
--- a/sys/kern/uipc_sockbuf.c
+++ b/sys/kern/uipc_sockbuf.c
@@ -1048,4 +1048,4 @@ SYSCTL_INT(_kern, KERN_DUMMY, dummy, CTLFLAG_RW, &dummy, 0, "");
 SYSCTL_OID(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLTYPE_ULONG|CTLFLAG_RW,
     &sb_max, 0, sysctl_handle_sb_max, "LU", "Maximum socket buffer size");
 SYSCTL_ULONG(_kern_ipc, KIPC_SOCKBUF_WASTE, sockbuf_waste_factor, CTLFLAG_RW,
-    &sb_efficiency, 0, "");
+    &sb_efficiency, 0, "Socket buffer size waste factor");
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
index b3920d3..50319bd 100644
--- a/sys/kern/vfs_syscalls.c
+++ b/sys/kern/vfs_syscalls.c
@@ -880,7 +880,8 @@ chroot_refuse_vdir_fds(fdp)
 static int chroot_allow_open_directories = 1;
 
 SYSCTL_INT(_kern, OID_AUTO, chroot_allow_open_directories, CTLFLAG_RW,
-     &chroot_allow_open_directories, 0, "");
+     &chroot_allow_open_directories, 0,
+     "Allow a process to chroot(2) if it has a directory open");
 
 /*
  * Change notion of root (``/'') directory.