Please note that diffs are not public domain; they are subject to the
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===================================================================
RCS file: /ftp/cvs/cvsroot/src/share/man/man7/sysctl.7,v
rcsdiff: /ftp/cvs/cvsroot/src/share/man/man7/sysctl.7,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.45
retrieving revision 1.67
diff -u -p -r1.45 -r1.67
--- src/share/man/man7/sysctl.7	2010/04/20 08:27:24	1.45
+++ src/share/man/man7/sysctl.7	2011/09/24 17:08:16	1.67
@@ -1,4 +1,4 @@
-.\"	$NetBSD: sysctl.7,v 1.45 2010/04/20 08:27:24 jruoho Exp $
+.\"	$NetBSD: sysctl.7,v 1.67 2011/09/24 17:08:16 christos Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"	@(#)sysctl.3	8.4 (Berkeley) 5/9/95
 .\"
-.Dd April 20, 2010
+.Dd September 24, 2011
 .Dt SYSCTL 7
 .Os
 .Sh NAME
@@ -68,29 +68,31 @@ sysctl variable relative to the upper le
 See the
 .Xr sysctl 3
 manual page for programming examples.
-.Sh Top level names
-The top level names are defined with a CTL_ prefix in
+.Ss Top level names
+The top level names are defined with a
+.Va CTL_
+prefix in
 .In sys/sysctl.h ,
 and are as follows.
 The next and subsequent levels down are found in the include files
 listed here, and described in separate sections below.
-.Bl -column security CTL_SECURITY "Next level names" "High kernel limits"
-.It Sy Name	Constant	Next level names	Description
-.It kern	CTL_KERN	sys/sysctl.h	High kernel limits
-.It vm	CTL_VM	uvm/uvm_param.h	Virtual memory
-.It vfs	CTL_VFS	sys/mount.h	Filesystem
-.It net	CTL_NET	sys/socket.h	Networking
-.It debug	CTL_DEBUG	sys/sysctl.h	Debugging
-.It hw	CTL_HW	sys/sysctl.h	Generic CPU, I/O
-.It machdep	CTL_MACHDEP	sys/sysctl.h	Machine dependent
-.It user	CTL_USER	sys/sysctl.h	User-level
-.It ddb	CTL_DDB	sys/sysctl.h	In-kernel debugger
-.It proc	CTL_PROC	sys/sysctl.h	Per-process
-.It vendor	CTL_VENDOR	?	Vendor specific
-.It emul	CTL_EMUL	sys/sysctl.h	Emulation settings
-.It security	CTL_SECURITY	sys/sysctl.h	Security settings
+.Bl -column "security" ".Dv CTL_SECURITY" ".In uvm/uvm_param.h" "High kernel limits"
+.It Sy Name  Ta Sy Constant     Ta Sy Next level names Ta Sy Description
+.It kern     Ta Dv CTL_KERN     Ta In sys/sysctl.h     Ta High kernel limits
+.It vm       Ta Dv CTL_VM       Ta In uvm/uvm_param.h  Ta Virtual memory
+.It vfs      Ta Dv CTL_VFS      Ta In sys/mount.h      Ta Filesystem
+.It net      Ta Dv CTL_NET      Ta In sys/socket.h     Ta Networking
+.It debug    Ta Dv CTL_DEBUG    Ta In sys/sysctl.h     Ta Debugging
+.It hw       Ta Dv CTL_HW       Ta In sys/sysctl.h     Ta Generic CPU, I/O
+.It machdep  Ta Dv CTL_MACHDEP  Ta In sys/sysctl.h     Ta Machine dependent
+.It user     Ta Dv CTL_USER     Ta In sys/sysctl.h     Ta User-level
+.It ddb      Ta Dv CTL_DDB      Ta In sys/sysctl.h     Ta In-kernel debugger
+.It proc     Ta Dv CTL_PROC     Ta In sys/sysctl.h     Ta Per-process
+.It vendor   Ta Dv CTL_VENDOR   Ta ?                   Ta Vendor specific
+.It emul     Ta Dv CTL_EMUL     Ta In sys/sysctl.h     Ta Emulation settings
+.It security Ta Dv CTL_SECURITY Ta In sys/sysctl.h     Ta Security settings
 .El
-.Sh The debug.* subtree
+.Ss The debug.* subtree
 The debugging variables vary from system to system.
 A debugging variable may be added or deleted without need to recompile
 .Nm
@@ -100,7 +102,7 @@ Each time it runs,
 gets the list of debugging variables from the kernel and
 displays their current values.
 The system defines twenty
-.Va ( struct ctldebug )
+.Vt ( struct ctldebug )
 variables named
 .Dv debug0
 through
@@ -110,7 +112,7 @@ individually initialized at the location
 The loader prevents multiple use of the same variable by issuing errors
 if a variable is initialized in more than one place.
 For example, to export the variable
-.Dv dospecialcheck
+.Va dospecialcheck
 as a debugging variable, the following declaration would be used:
 .Pp
 .Bd -literal -offset indent -compact
@@ -128,28 +130,58 @@ See
 .\" and
 .\" .Xr sysctl 9
 for more information.
-.Sh The vfs.* subtree
+.Ss The vfs.* subtree
 A distinguished second level name,
 .Li vfs.generic ( VFS_GENERIC ) ,
-is used to get general information about all filesystems.
+is used to get general information about all file systems.
 It has the following third level identifiers:
-.Bl -tag -width compact
-.It vfs.generic.maxtypenum ( VFS_MAXTYPENUM )
-The highest valid filesystem type number.
-.It vfs.generic.conf ( VFS_CONF )
-Returns configuration information about the file-system type given as a fourth
+.Bl -tag -width "123456"
+.It Li vfs.generic.maxtypenum ( VFS_MAXTYPENUM )
+The highest valid file system type number.
+.It Li vfs.generic.conf ( VFS_CONF )
+Returns configuration information about the file system type given as a fourth
 level identifier.
+.It Li vfs.generic.usermount ( VFS_USERMOUNT )
+Determines if non superuser mounts are allowed, default to no
+.Dv 0 .
+.It Li vfs.generic.magiclinks ( VFS_MAGICLINKS )
+Controls if expansion of variables is going to be performed on pathnames
+or not.
+Defaults to no variable expansion,
+.Dv 0 .
+Variables are of the form
+.Li @name
+and the variables supported are described in
+.Xr symlink 7
+under
+.Dq "MAGIC SYMLINKS" .
+.El
+.Pp
+A second level name for controlling the
+.Xr wapbl 4
+(Write Ahead Physical Block Logging file system journalling)
+capabilities with the following third level identifiers:
+.Bl -tag -width "123456"
+.It Li vfs.wapbl.flush_disk_cache
+Controls whether to attempt to flush the disk cache on each commit.
+It defaults to 1 and it should always be on to ensure data integrity in
+case of a crash.
+For slow disks, turning it off can improve performance.
+.It Li vfs.wapbl.verbose_commit
+For each transaction log commit, print the number of bytes written
+and the time it took to commit as seconds.nanoseconds.
 .El
 .Pp
-The remaining second level identifiers are the file-system names, identified
+The remaining second level identifiers are the file system names, identified
 by the type number returned by a
 .Xr statvfs 2
 call or from
 .Li vfs.generic.conf .
-The third level identifiers available for each filesystem
+.Pp
+The third level identifiers available for each file system
 are given in the header file that defines the mount
-argument structure for that filesystem.
-.Sh The hw.* subtree
+argument structure for that file system.
+.Ss The hw.* subtree
 The string and integer information available for the
 .Li hw
 level is detailed below.
@@ -179,10 +211,10 @@ Alignment constraint for all possible da
 This shows the value
 .Dv ALIGNBYTES
 in
-.Pa /usr/include/machine/param.h ,
+.In machine/param.h ,
 at the kernel compilation time.
 .It Li hw.byteorder ( HW_BYTEORDER )
-The byteorder (4,321, or 1,234).
+The byteorder (4321, or 1234).
 .It Li hw.cnmagic ( HW_CNMAGIC )
 The console magic key sequence.
 .It Li hw.disknames ( HW_DISKNAMES )
@@ -194,15 +226,15 @@ collected on them.
 Return statistical information on the NFS mounts, disk and tape
 devices on the system.
 An array of
-.Va struct io_sysctl
+.Vt struct io_sysctl
 structures is returned,
 whose size depends on the current number of such objects in the system.
 The third level name is the size of the
-.Va struct io_sysctl .
+.Vt struct io_sysctl .
 The type of object can be determined by examining the
 .Va type
 element of
-.Va struct io_sysctl .
+.Vt struct io_sysctl .
 Which can be
 .Dv IOSTAT_DISK
 (disk drive),
@@ -229,7 +261,7 @@ The bytes of non-kernel memory as a 32-b
 .It Li hw.usermem64 ( HW_USERMEM64 )
 The bytes of non-kernel memory as a 64-bit integer.
 .El
-.Sh The kern.* subtree
+.Ss The kern.* subtree
 This subtree includes data generally related to the kernel.
 The string and integer information available for the
 .Li kern
@@ -239,6 +271,8 @@ privilege may change the value.
 .Bl -column "kern.posix_reader_writer_locks" \
 "struct kinfo_drivers" "not applicable"
 .It Sy Second level name	Type	Changeable
+.It kern.aio_listio_max	integer	yes
+.It kern.aio_max	integer	yes
 .It kern.arandom	integer	no
 .It kern.argmax	integer	no
 .It kern.boothowto	integer	no
@@ -250,7 +284,7 @@ privilege may change the value.
 .It kern.coredump	node	not applicable
 .It kern.cp_id	struct	no
 .It kern.cp_time	uint64_t[\|]	no
-.\".It kern.cryptodevallowsoft	integer	yes
+.It kern.cryptodevallowsoft	integer	yes
 .It kern.defcorename	string	yes
 .It kern.detachall	integer	yes
 .It kern.domainname	string	yes
@@ -283,6 +317,7 @@ privilege may change the value.
 .It kern.memory_protection	integer	no
 .It kern.module	node	not applicable
 .It kern.monotonic_clock	integer	no
+.It kern.mqueue	node	not applicable
 .It kern.msgbuf	integer	no
 .It kern.msgbufsize	integer	no
 .It kern.ngroups	integer	no
@@ -295,6 +330,7 @@ privilege may change the value.
 .It kern.pipe	node	not applicable
 .\" .It kern.posix	node	not applicable
 .It kern.posix1version	integer	no
+.It kern.posix_aio	integer	no
 .It kern.posix_barriers	integer	no
 .It kern.posix_reader_writer_locks	integer	no
 .\".It kern.posix_sched	integer	yes
@@ -320,6 +356,7 @@ privilege may change the value.
 .It kern.timecounter	node	not applicable
 .It kern.timex	struct	no
 .It kern.tkstat	node	not applicable
+.It kern.tty	node	not applicable
 .It kern.urandom	integer	no
 .It kern.usercrypto	integer	yes
 .It kern.userasymcrypto	integer	yes
@@ -328,10 +365,20 @@ privilege may change the value.
 .It kern.vnode	struct vnode	no
 .El
 .Bl -tag -width "123456"
+.It Li kern.aio_listio_max
+The maximum number of asynchronous
+.Tn I/O
+operations in a single list I/O call.
+Like with all variables related to
+.Xr aio 3 ,
+the variable may be created and removed dynamically
+upon loading or unloading the corresponding kernel module.
+.It Li kern.aio_max
+The maximum number of asynchronous I/O operations.
 .It Li kern.arandom
 This variable picks a random number each time it is queried.
 The used random number generator
-.Pq Tn RNG
+.Pf ( Tn RNG )
 is based on
 .Xr arc4random 3 .
 .It Li kern.argmax ( KERN_ARGMAX )
@@ -343,7 +390,7 @@ Flags passed from the boot loader; see
 for the meanings of the flags.
 .It Li kern.boottime ( KERN_BOOTTIME )
 A
-.Va struct timeval
+.Vt struct timeval
 structure is returned.
 This structure contains the time that the system was booted.
 .\" .It Li kern.bufq
@@ -352,7 +399,7 @@ This structure contains the time that th
 The scheduler exponential decay value.
 .It Li kern.clockrate ( KERN_CLOCKRATE )
 A
-.Va struct clockinfo
+.Vt struct clockinfo
 structure is returned.
 This structure contains the clock, statistics clock and profiling clock
 frequencies, the number of micro-seconds per hz tick, and the clock
@@ -399,15 +446,30 @@ Same syntax as kern.defcorename.
 .It Li kern.cp_id ( KERN_CP_ID )
 Mapping of CPU number to CPU id.
 .It Li kern.cp_time ( KERN_CP_TIME )
-Returns an array of CPUSTATES uint64_ts.
+Returns an array of
+.Dv CPUSTATES
+.Vt uint64_t Ns s.
 This array contains the
 number of clock ticks spent in different CPU states.
 On multi-processor systems, the sum across all CPUs is returned unless
 appropriate space is given for one data set for each CPU.
 Data for a specific CPU can also be obtained by adding the number of the
 CPU at the end of the MIB, enlarging it by one.
-.\".It Li kern.cryptodevallowsoft
-.\" XXX: Undocumented.
+.It Li kern.cryptodevallowsoft
+This variable controls userland access to hardware versus software transforms
+in the
+.Xr crypto 4
+system.
+The available values are as follows:
+.Bl -tag -width XX0 -offset indent
+.It Dv \*[Lt] 0
+Always force userlevel requests to use software transforms.
+.It Dv = 0
+If present, use hardware and grant userlevel requests for
+non-accelerated transforms (handling the latter in software).
+.It Dv \*[Gt] 0
+Allow user requests only for transforms which are hardware-accelerated.
+.El
 .It Li kern.defcorename ( KERN_DEFCORENAME )
 Default template for the name of core dump files (see also
 .Li proc.pid.corename
@@ -417,7 +479,7 @@ and
 .Xr core 5
 for format of this template).
 The default value is
-.Nm %n.core
+.Pa %n.core
 and can be changed with the kernel configuration option
 .Cd options DEFCORENAME
 (see
@@ -429,7 +491,7 @@ Detach all devices at shutdown.
 Get or set the YP domain name.
 .It Li kern.drivers ( KERN_DRIVERS )
 Return an array of
-.Va struct kinfo_drivers
+.Vt struct kinfo_drivers
 that contains the name and major device numbers of all the device drivers
 in the current kernel.
 The
@@ -444,9 +506,9 @@ Perform a crash dump on system
 .It Li kern.file ( KERN_FILE )
 Return the entire file table.
 The returned data consists of a single
-.Va struct filelist
+.Vt struct filelist
 followed by an array of
-.Va struct file ,
+.Vt struct file ,
 whose size depends on the current number of such objects in the system.
 .It Li kern.forkfsleep ( KERN_FORKFSLEEP )
 If
@@ -462,9 +524,11 @@ Maximum is 20 seconds.
 .It Li kern.fscale ( KERN_FSCALE )
 The kernel fixed-point scale factor.
 .It Li kern.fsync ( KERN_FSYNC )
-Return 1 if the POSIX 1003.1b File Synchronization Option is available
+Return 1 if the
+.St -p1003.1b-93
+File Synchronization Option is available
 on this system,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.hardclock_ticks ( KERN_HARDCLOCK_TICKS )
 Returns the number of
 .Xr hardclock 9
@@ -481,7 +545,7 @@ Get or set the
 .Xr hostname 1 .
 .It Li kern.iov_max ( KERN_IOV_MAX )
 Return the maximum number of
-.Va iovec
+.Vt iovec
 structures that a process has available for use with
 .Xr preadv 2 ,
 .Xr pwritev 2 ,
@@ -514,15 +578,15 @@ The third level names for the ipc variab
 .It Li kern.ipc.sysvmsg ( KERN_SYSVIPC_MSG )
 Returns 1 if System V style message queue functionality is available
 on this system,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.ipc.sysvsem ( KERN_SYSVIPC_SEM )
 Returns 1 if System V style semaphore functionality is available
 on this system,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.ipc.sysvshm ( KERN_SYSVIPC_SHM )
 Returns 1 if System V style share memory functionality is available
 on this system,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.ipc.sysvipc_info ( KERN_SYSVIPC_INFO )
 Return System V style IPC configuration and run-time information.
 The fourth level name selects the System V style IPC facility.
@@ -577,9 +641,11 @@ Max number of number of semaphores in sy
 Max number of undo structures in system.
 .El
 .It Li kern.job_control ( KERN_JOB_CONTROL )
-Return 1 if job control is available on this system, otherwise 0.
+Return 1 if job control is available on this system, otherwise\ 0.
 .It Li kern.labeloffset ( KERN_LABELOFFSET )
-The offset within the sector specified by KERN_LABELSECTOR of the
+The offset within the sector specified by
+.Dv KERN_LABELSECTOR
+of the
 .Xr disklabel 5 .
 .It Li kern.labelsector ( KERN_LABELSECTOR )
 The sector number containing the
@@ -594,9 +660,10 @@ all process exits due to signals which c
 .Xr core 5
 file, and whether the coredump was created.
 .It Li kern.mapped_files ( KERN_MAPPED_FILES )
-Returns 1 if the POSIX 1003.1b Memory Mapped Files Option is available
-on this system,
-otherwise 0.
+Returns 1 if the
+.St -p1003.1b-93
+Memory Mapped Files Option is available on this system,
+otherwise\ 0.
 .It Li kern.maxfiles ( KERN_MAXFILES )
 The maximum number of open files that may be open in the system.
 .It Li kern.maxpartitions ( KERN_MAXPARTITIONS )
@@ -648,17 +715,20 @@ The variable can only be increased, and 
 direct-mapped pool pages.
 .El
 .It Li kern.memlock ( KERN_MEMLOCK )
-Returns 1 if the POSIX 1003.1b Process Memory Locking Option is available
-on this system,
-otherwise 0.
+Returns 1 if the
+.St -p1003.1b-93
+Process Memory Locking Option is available on this system,
+otherwise\ 0.
 .It Li kern.memlock_range ( KERN_MEMLOCK_RANGE )
-Returns 1 if the POSIX 1003.1b Range Memory Locking Option is available
-on this system,
-otherwise 0.
+Returns 1 if the
+.St -p1003.1b-93
+Range Memory Locking Option is available on this system,
+otherwise\ 0.
 .It Li kern.memory_protection ( KERN_MEMORY_PROTECTION )
-Returns 1 if the POSIX 1003.1b Memory Protection Option is available
-on this system,
-otherwise 0.
+Returns 1 if the
+.St -p1003.1b-93
+Memory Protection Option is available on this system,
+otherwise\ 0.
 .It Li kern.module
 Settings related to kernel modules.
 The third level names for the settings are described below.
@@ -672,17 +742,48 @@ The variables are as follows:
 .Bl -tag -width "123456"
 .It Li kern.module.autoload
 A boolean that controls whether kernel modules are loaded automatically.
-See for example
-.Xr modstat 8
+See
+.Xr module 7
 for additional details.
 .It Li kern.module.verbose
 A boolean that enables or disables verbose
 debug messages related to kernel modules.
 .El
 .It Li kern.monotonic_clock ( KERN_MONOTONIC_CLOCK )
-Returns the standard version the implementation of the POSIX 1003.1b
+Returns the standard version the implementation of the
+.St -p1003.1b-93
 Monotonic Clock Option conforms to,
-otherwise 0.
+otherwise\ 0.
+.It Li kern.mqueue
+Settings related to
+.Tn POSIX
+message queues; see
+.Xr mqueue 3 .
+This node is created dynamically when
+the corresponding kernel module is loaded.
+The third level names for the settings are described below.
+.Bl -column "kern.mqueue.mq_max_msgsize" "integer" "Changeable" -offset indent
+.It Sy Third level name	Type	Changeable
+.It kern.mqueue.mq_open_max	integer	yes
+.It kern.mqueue.mq_prio_max	integer	yes
+.It kern.mqueue.mq_max_msgsize	integer	yes
+.It kern.mqueue.mq_def_maxmsg	integer	yes
+.It kern.mqueue.mq_max_maxmsg	integer	yes
+.El
+.Pp
+The variables are:
+.Bl -tag -width "123456"
+.It Li kern.mqueue.mq_open_max
+The maximum number of message queue descriptors any single process can open.
+.It Li kern.mqueue.mq_prio_max
+The maximum priority of a message.
+.It Li kern.mqueue.mq_max_msgsize
+The maximum size of a message in a message queue.
+.It Li kern.mqueue.mq_def_maxmsg
+The default maximum message count.
+.It Li kern.mqueue.mq_max_maxmsg
+The maximum number of messages in a message queue.
+.El
 .It Li kern.msgbuf ( KERN_MSGBUF )
 The kernel message buffer, rotated so that the head of the circular kernel
 message buffer is at the start of the returned data.
@@ -695,7 +796,7 @@ The maximum number of supplemental group
 .\" XXX: Undocumented.
 .It Li kern.ntptime ( KERN_NTPTIME )
 A
-.Va struct ntptimeval
+.Vt struct ntptimeval
 structure is returned.
 This structure contains data used by the
 .Xr ntpd 8
@@ -727,33 +828,42 @@ The variables are as follows:
 .It Li kern.pipe.kvasiz ( KERN_PIPE_KVASIZ )
 Amount of kernel memory consumed by pipe buffers.
 .It Li kern.pipe.maxbigpipes ( KERN_PIPE_MAXBIGPIPES )
-Maximum number of "big" pipes.
+Maximum number of
+.Dq big
+pipes.
 .It Li kern.pipe.maxkvasz ( KERN_PIPE_MAXKVASZ )
 Maximum amount of kernel memory to be used for pipes.
 .It Li kern.pipe.limitkva ( KERN_PIPE_LIMITKVA )
 Limit for direct transfers via page loan.
 .It Li kern.pipe.nbigpipes ( KERN_PIPE_NBIGPIPES )
-Number of "big" pipes.
+Number of
+.Dq big
+pipes.
 .El
 .\" XXX: Undocumented .It Li kern.posix ( ? )
 .\"	 This is a node in which the only variable is semmax.
 .It Li kern.posix1version ( KERN_POSIX1 )
-The version of ISO/IEC 9945 (POSIX 1003.1) with which the system
-attempts to comply.
+The version of ISO/IEC 9945
+.Pq St -p1003.1
+with which the system attempts to comply.
+.It Li kern.posix_aio
+The version of
+.St -p1003.1
+and its Asynchronous I/O option to which the system attempts to conform.
 .It Li kern.posix_barriers ( KERN_POSIX_BARRIERS )
 The version of
 .St -p1003.1
 and its
 Barriers
 option to which the system attempts to conform,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.posix_reader_writer_locks ( KERN_POSIX_READER_WRITER_LOCKS )
 The version of
 .St -p1003.1
 and its
 Read-Write Locks
 option to which the system attempts to conform,
-otherwise 0.
+otherwise\ 0.
 .\".It Li kern.posix_sched
 .\" XXX: Undocumented.
 .It Li kern.posix_semaphores ( KERN_POSIX_SEMAPHORES )
@@ -762,32 +872,32 @@ The version of
 and its
 Semaphores
 option to which the system attempts to conform,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.posix_spin_locks ( KERN_POSIX_SPIN_LOCKS )
 The version of
 .St -p1003.1
 and its
 Spin Locks
 option to which the system attempts to conform,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.posix_threads ( KERN_POSIX_THREADS )
 The version of
 .St -p1003.1
 and its
 Threads
 option to which the system attempts to conform,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.posix_timers ( KERN_POSIX_TIMERS )
 The version of
 .St -p1003.1
 and its
 Timers
 option to which the system attempts to conform,
-otherwise 0.
+otherwise\ 0.
 .It Li kern.proc ( KERN_PROC )
 Return the entire process table, or a subset of it.
 An array of
-.Va struct kinfo_proc
+.Vt struct kinfo_proc
 structures is returned,
 whose size depends on the current number of such objects in the system.
 The third and fourth level numeric names are as follows:
@@ -804,11 +914,13 @@ The third and fourth level numeric names
 .It KERN_PROC_UID	A user ID
 .El
 .It Li kern.proc2 ( KERN_PROC2 )
-As for KERN_PROC, but an array of
-.Va struct kinfo_proc2
+As for
+.Dv KERN_PROC ,
+but an array of
+.Vt struct kinfo_proc2
 structures are returned.
 The fifth level name is the size of the
-.Va struct kinfo_proc2
+.Vt struct kinfo_proc2
 and the sixth level name is the number of structures to return.
 .It Li kern.proc_args ( KERN_PROC_ARGS )
 Return the argv or environment strings (or the number thereof)
@@ -825,8 +937,9 @@ The fourth level name is as follows:
 .It Li kern.profiling ( KERN_PROF )
 Return profiling information about the kernel.
 If the kernel is not compiled for profiling,
-attempts to retrieve any of the KERN_PROF values will
-fail with
+attempts to retrieve any of the
+.Dv KERN_PROF
+values will fail with
 .Er EOPNOTSUPP .
 The third level names for the string and integer profiling information
 is detailed below.
@@ -851,11 +964,15 @@ Array indexed by program counter of call
 Structure giving the sizes of the above arrays.
 .It Li kern.profiling.state ( GPROF_STATE )
 Profiling state.
-If set to GMON_PROF_ON, starts profiling.
-If set to GMON_PROF_OFF, stops profiling.
+If set to
+.Dv GMON_PROF_ON ,
+starts profiling.
+If set to
+.Dv GMON_PROF_OFF ,
+stops profiling.
 .It Li kern.profiling.tos ( GPROF_TOS )
 Array of
-.Va struct tostruct
+.Vt struct tostruct
 describing destination of calls and their counts.
 .El
 .\" .It Li kern.pset
@@ -883,9 +1000,10 @@ See
 Maximum amount of kernel memory to be used for socket buffers.
 .\" XXX units?
 .It Li kern.synchronized_io ( KERN_SYNCHRONIZED_IO )
-Returns 1 if the POSIX 1003.1b Synchronized I/O Option is available
-on this system,
-otherwise 0.
+Returns 1 if the
+.St -p1003.1b-93
+Synchronized I/O Option is available on this system,
+otherwise\ 0.
 .It Li kern.timecounter ( dynamic )
 Display and control the timecounter source of the system.
 .Bl -column "kern.timecounter.timestepwarnings" "integer" "Changeable" -offset indent
@@ -931,6 +1049,25 @@ The total number of output characters.
 .It Li kern.tkstat.rawcc ( KERN_TKSTAT_RAWCC )
 The number of raw input characters.
 .El
+.It Li kern.tty
+The third level names for the tty setup variables are detailed below.
+The changeable column shows whether a process
+with appropriate privilege may change the value.
+.Bl -column "kern.tty.qsize" "int" "Changeable" -offset indent
+.It Sy Third level name	Type	Changeable
+.It kern.tty.qsize	int	yes
+.El
+.Pp
+The variables are as follows:
+.Bl -tag -width "123456"
+.It Li kern.tty.qsize
+Control/display the size of the default input and output queues selected
+during tty creation.
+Is converted to a power of two and its range is between
+.Dv 1024
+and
+.Dv 65536 .
+.El
 .It Li kern.urandom ( KERN_URND )
 Random integer value.
 .It Li kern.usercrypto
@@ -964,11 +1101,11 @@ Each mount will be under its own
 .No tableN
 node.
 Under each node there will be three variables, indicating the mount
-point, the file-system type, and the number of entries.
+point, the file system type, and the number of entries.
 .It Li kern.veriexec.strict
 Controls the strict level of Veriexec.
 See
-.Xr security 8
+.Xr security 7
 for more information on each level's implications.
 .It Li kern.veriexec.verbose
 Controls the verbosity level of Veriexec.
@@ -989,12 +1126,12 @@ the system.
 The returned data consists of an array whose size depends on the
 current number of such objects in the system.
 Each element of the array contains the kernel address of a vnode
-.Va struct vnode *
+.Vt struct vnode *
 followed by the vnode itself
-.Va struct vnode .
+.Vt struct vnode .
 .\" XXX: Undocumented: kern.lwp: no children?
 .El
-.Sh The machdep.* subtree
+.Ss The machdep.* subtree
 The set of variables defined is architecture dependent.
 Most architectures define at least the following variables.
 .Bl -column "machdep.booted_kernel" "Type" "Changeable" -offset indent
@@ -1002,7 +1139,7 @@ Most architectures define at least the f
 .It Li machdep.booted_kernel	string	no
 .El
 .\" XXX: Document the above.
-.Sh The net.* subtree
+.Ss The net.* subtree
 The string and integer information available for the
 .Li net
 level is detailed below.
@@ -1027,7 +1164,7 @@ The data is returned as a sequence of ro
 for the header file, format and meaning).
 The length of each message is contained in the message header.
 .Pp
-The third level name is a protocol number, which is currently always 0.
+The third level name is a protocol number, which is currently always\ 0.
 The fourth level name is an address family, which may be set to 0 to
 select all address families.
 The fifth and sixth level names are as follows:
@@ -1047,6 +1184,9 @@ The currently defined protocols and name
 .It Sy Protocol name	Variable name	Type	Changeable
 .It arp	down	integer	yes
 .It arp	keep	integer	yes
+.It arp	log_movements	integer	yes
+.It arp	log_permanent_modify	integer	yes
+.It arp	log_wrong_iface	integer	yes
 .It arp	prune	integer	yes
 .It arp	refresh	integer	yes
 .It carp	allow	integer	yes
@@ -1118,6 +1258,8 @@ The currently defined protocols and name
 .It udp	checksum	integer	yes
 .It udp	do_loopback_cksum	integer	yes
 .It udp	recvspace	integer	yes
+.It udp	rfc6056.selected	string	yes
+.It udp	rfc6056.available	string	yes
 .It udp	sendspace	integer	yes
 .El
 .Pp
@@ -1397,10 +1539,14 @@ It has no effect unless tcp.abc.enable i
 If set to 1, UDP checksums are being computed.
 Received non-zero UDP checksums are always checked.
 Disabling UDP checksums is strongly discouraged.
-.It Li udp.sendspace
-The default UDP send buffer size.
 .It Li udp.recvspace
 The default UDP receive buffer size.
+.It Li udp.rfc6056.available
+The available RFC 6056 port randomization algorithms.
+.It Li udp.rfc6056.selected
+The currently selected RFC 6056 port randomization algorithm.
+.It Li udp.sendspace
+The default UDP send buffer size.
 .El
 .Pp
 For variables net.*.ipsec, please refer to
@@ -1451,6 +1597,8 @@ The currently defined protocols and name
 .It ip6	v6only	integer	yes
 .It udp6	do_loopback_cksum	integer	yes
 .It udp6	recvspace	integer	yes
+.It udp6	rfc6056.selected	string	yes
+.It udp6	rfc6056.available	string	yes
 .It udp6	sendspace	integer	yes
 .El
 .Pp
@@ -1505,7 +1653,7 @@ The number of IPv6 extension headers per
 If set to 0, the node will accept as many extension headers as possible.
 .It Li ip6.hashsize
 The size of IPv6 Fast Forward hash table.
-This value must be a power of 2 (64, 256...).
+This value must be a power of 2 (64, 256, ...).
 A larger hash table size results in fewer collisions.
 Also see
 .Li ip6.maxflows .
@@ -1658,6 +1806,10 @@ ICMPv6 redirect.
 Perform UDP checksum on loopback.
 .It Li udp6.recvspace
 Default UDP receive buffer size.
+.It Li udp6.rfc6056.available
+The available RFC 6056 port randomization algorithms for IPv6.
+.It Li udp6.rfc6056.selected
+The currently selected RFC 6056 port randomization algorithm for IPv6.
 .It Li udp6.sendspace
 Default UDP send buffer size.
 .El
@@ -1696,7 +1848,7 @@ The variables are as follows:
 .It Li debug
 Turn on debugging message from within the kernel.
 The value is a bitmap, as defined in
-.Pa /usr/include/netkey/key_debug.h .
+.In netkey/key_debug.h .
 .It Li spi_try
 The number of times the kernel will try to obtain an unique SPI
 when it generates it from random number generator.
@@ -1727,7 +1879,7 @@ The value is used when the kernel create
 on ACQUIRE PF_KEY message.
 .El
 .El
-.Sh The proc.* subtree
+.Ss The proc.* subtree
 The string and integer information available for the
 .Li proc
 level is detailed below.
@@ -1755,9 +1907,12 @@ The template used for the core dump file
 .Xr core 5
 for details).
 The base name must either be
-.Nm core
-or end with the suffix ``.core'' (the super-user may set arbitrary names).
-By default it points to KERN_DEFCORENAME.
+.Pa core
+or end with the suffix
+.Pa .core
+(the super-user may set arbitrary names).
+By default it points to
+.Dv KERN_DEFCORENAME .
 .It Li proc.pid.rlimit ( PROC_PID_LIMIT )
 Return resources limits, as defined for the
 .Xr getrlimit 2
@@ -1765,7 +1920,7 @@ and
 .Xr setrlimit 2
 system calls.
 The fourth level name is one of:
-.Bl -tag -width PROC_PID_LIMIT_MEMLOCKAA
+.Bl -tag -width "123456"
 .It Li proc.pid.rlimit.cputime ( PROC_PID_LIMIT_CPU )
 The maximum amount of CPU time (in seconds) to be used by each process.
 .It Li proc.pid.rlimit.filesize ( PROC_PID_LIMIT_FSIZE )
@@ -1809,7 +1964,8 @@ options.
 .El
 .Pp
 The fifth level name is one of
-.Li soft ( PROC_PID_LIMIT_TYPE_SOFT ) or
+.Li soft ( PROC_PID_LIMIT_TYPE_SOFT )
+or
 .Li hard ( PROC_PID_LIMIT_TYPE_HARD ) ,
 to select respectively the soft or hard limit.
 Both are of type integer.
@@ -1859,7 +2015,7 @@ before it disappears.
 .Pp
 This value is also inherited by the process's children.
 .El
-.Sh The user.* subtree ( CTL_USER )
+.Ss The user.* subtree ( CTL_USER )
 The string and integer information available for the
 .Li user
 level is detailed below.
@@ -1927,29 +2083,33 @@ The maximum length in bytes of a text-pr
 line.
 .It Li user.posix2_char_term ( USER_POSIX2_CHAR_TERM )
 Return 1 if the system supports at least one terminal type capable of
-all operations described in POSIX 1003.2, otherwise 0.
+all operations described in
+.St -p1003.2 ,
+otherwise\ 0.
 .It Li user.posix2_c_bind ( USER_POSIX2_C_BIND )
 Return 1 if the system's C-language development facilities support the
-C-Language Bindings Option, otherwise 0.
+C-Language Bindings Option, otherwise\ 0.
 .It Li user.posix2_c_dev ( USER_POSIX2_C_DEV )
 Return 1 if the system supports the C-Language Development Utilities Option,
-otherwise 0.
+otherwise\ 0.
 .It Li user.posix2_fort_dev ( USER_POSIX2_FORT_DEV )
 Return 1 if the system supports the FORTRAN Development Utilities Option,
-otherwise 0.
+otherwise\ 0.
 .It Li user.posix2_fort_run ( USER_POSIX2_FORT_RUN )
 Return 1 if the system supports the FORTRAN Runtime Utilities Option,
-otherwise 0.
+otherwise\ 0.
 .It Li user.posix2_localedef ( USER_POSIX2_LOCALEDEF )
-Return 1 if the system supports the creation of locales, otherwise 0.
+Return 1 if the system supports the creation of locales, otherwise\ 0.
 .It Li user.posix2_sw_dev ( USER_POSIX2_SW_DEV )
 Return 1 if the system supports the Software Development Utilities Option,
-otherwise 0.
+otherwise\ 0.
 .It Li user.posix2_upe ( USER_POSIX2_UPE )
 Return 1 if the system supports the User Portability Utilities Option,
-otherwise 0.
+otherwise\ 0.
 .It Li user.posix2_version ( USER_POSIX2_VERSION )
-The version of POSIX 1003.2 with which the system attempts to comply.
+The version of
+.St -p1003.2
+with which the system attempts to comply.
 .It Li user.re_dup_max ( USER_RE_DUP_MAX )
 The maximum number of repeated occurrences of a regular expression
 permitted when using interval notation.
@@ -1960,7 +2120,7 @@ at any one time.
 The minimum maximum number of types supported for the name of a
 timezone.
 .El
-.Sh The vm.* subtree ( CTL_VM )
+.Ss The vm.* subtree ( CTL_VM )
 The string and integer information available for the
 .Li vm
 level is detailed below.
@@ -2020,28 +2180,28 @@ cached file data.
 .It Li vm.loadavg ( VM_LOADAVG )
 Return the load average history.
 The returned data consists of a
-.Va struct loadavg .
+.Vt struct loadavg .
 .It Li vm.maxslp ( VM_MAXSLP )
 The value of the maxslp kernel global variable.
 .It Li vm.vmmeter ( VM_METER )
 Return system wide virtual memory statistics.
 The returned data consists of a
-.Va struct vmtotal .
+.Vt struct vmtotal .
 .It vm.user_va0_disable
-A flag which controls whether user processes can map virtual address 0.
+A flag which controls whether user processes can map virtual address\ 0.
 .It Li vm.uspace ( VM_USPACE )
 The number of bytes allocated for each kernel stack.
 .It Li vm.uvmexp ( VM_UVMEXP )
 Return system wide virtual memory statistics.
 The returned data consists of a
-.Va struct uvmexp .
+.Vt struct uvmexp .
 .It Li vm.uvmexp2 ( VM_UVMEXP2 )
 Return system wide virtual memory statistics.
 The returned data consists of a
-.Va struct uvmexp_sysctl .
+.Vt struct uvmexp_sysctl .
 .\" XXX vm.idlezero
 .El
-.Sh The ddb.* subtree ( CTL_DDB )
+.Ss The ddb.* subtree ( CTL_DDB )
 The information available for the
 .Li ddb
 level is detailed below.
@@ -2073,7 +2233,12 @@ Number of display lines.
 .It Li ddb.tabstops ( DDBCTL_TABSTOPS )
 Tab width.
 .It Li ddb.onpanic ( DDBCTL_ONPANIC )
-If non-zero, DDB will be entered if the kernel panics.
+If greater than zero, DDB will be entered if the kernel panics.
+A value of 1 causes the system to enter DDB on panic, while a value of 2
+causes the kernel to attempt to print out a stack trace before entering DDB.
+A value of 0 causes the kernel to attempt to print a stack trace, then
+reboot, while a value of \-1 means neither a stack trace will be printed
+nor DDB entered.
 .It Li ddb.fromconsole ( DDBCTL_FROMCONSOLE )
 If not zero, DDB may be entered by sending a break on a serial
 console or by a special key sequence on a graphics console.
@@ -2093,7 +2258,7 @@ nodes are also available as variables fr
 See
 .Xr ddb 4
 for more details.
-.Sh The security.* subtree ( CTL_SECURITY )
+.Ss The security.* subtree ( CTL_SECURITY )
 The
 .Li security
 level contains various security-related settings for
@@ -2143,7 +2308,7 @@ Settings for PaX -- exploit mitigation f
 For more information on any of the PaX features, please see
 .Xr paxctl 8
 and
-.Xr security 8 .
+.Xr security 7 .
 The available third and fourth level names are:
 .Bl -column "security.pax.segvguard.suspend_timeout" "integer" "Changeable" \
 -offset 2n
@@ -2235,7 +2400,7 @@ Number of seconds to suspend a user from
 limit was exceeded.
 .El
 .El
-.Sh The vendor.* subtree ( CTL_VENDOR )
+.Ss The vendor.* subtree ( CTL_VENDOR )
 The
 .Li vendor
 toplevel name is reserved to be used by vendors who wish to
@@ -2246,7 +2411,7 @@ Intended use is to store values under
 .Xr sysctl 3 ,
 .Xr ipsec 4 ,
 .Xr tcp 4 ,
-.Xr security 8 ,
+.Xr security 7 ,
 .Xr sysctl 8
 .Sh HISTORY
 The