Tidy up the markup.

Approved by:	re (blanket manpages)

1 files changed, 285 insertions, 214 deletions

diff --git a/lib/libdevstat/devstat.3 b/lib/libdevstat/devstat.3
index fc6c769..2b314dd 100644
--- a/lib/libdevstat/devstat.3
+++ b/lib/libdevstat/devstat.3
@@ -27,7 +27,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 15, 2001
+.Dd March 18, 2003
 .Dt DEVSTAT 3
 .Os
 .Sh NAME
@@ -47,26 +47,15 @@
 .Sh SYNOPSIS
 .In devstat.h
 .Ft int
-.Fo devstat_getnumdevs
-.Fa "kvm_t *kd"
-.Fc
+.Fn devstat_getnumdevs "kvm_t *kd"
 .Ft long
-.Fo devstat_getgeneration
-.Fa "kvm_t *kd"
-.Fc
+.Fn devstat_getgeneration "kvm_t *kd"
 .Ft int
-.Fo devstat_getversion
-.Fa "kvm_t *kd"
-.Fc
+.Fn devstat_getversion "kvm_t *kd"
 .Ft int
-.Fo devstat_checkversion
-.Fa "kvm_t *kd"
-.Fc
+.Fn devstat_checkversion "kvm_t *kd"
 .Ft int
-.Fo devstat_getdevs
-.Fa "kvm_t *kd"
-.Fa "struct statinfo *stats"
-.Fc
+.Fn devstat_getdevs "kvm_t *kd" "struct statinfo *stats"
 .Ft int
 .Fo devstat_selectdevs
 .Fa "struct device_selection **dev_select"
@@ -97,11 +86,8 @@
 .Fa "long double etime"
 .Fa "..."
 .Fc
-.Ft long double
-.Fo devstat_compute_etime
-.Fa "struct bintime cur_time"
-.Fa "struct bintime prev_time"
-.Fc
+.Ft "long double"
+.Fn devstat_compute_etime "struct bintime cur_time" "struct bintime prev_time"
 .Sh DESCRIPTION
 The
 .Nm
@@ -112,7 +98,7 @@ interface, which is accessible to users via
 and
 .Xr kvm 3 .
 All functions that take a
-.Vt kvm_t *
+.Vt "kvm_t *"
 as first argument can be passed
 .Dv NULL
 instead of a kvm handle as this argument,
@@ -121,41 +107,57 @@ which causes the data to be read via
 Otherwise, it is read via
 .Xr kvm 3
 using the supplied handle.
+The
 .Fn devstat_checkversion
+function
 should be called with each kvm handle that is going to be used (or with
 .Dv NULL
 if
 .Xr sysctl 3
 is going to be used).
 .Pp
+The
 .Fn devstat_getnumdevs
+function
 returns the number of devices registered with the
 .Nm
 subsystem in the kernel.
 .Pp
+The
 .Fn devstat_getgeneration
+function
 returns the current generation of the
 .Nm
 list of devices in the kernel.
 .Pp
+The
 .Fn devstat_getversion
+function
 returns the current kernel
 .Nm
 version.
 .Pp
+The
 .Fn devstat_checkversion
-checks the userland devstat version against the kernel devstat version.
+function
+checks the userland
+.Nm
+version against the kernel
+.Nm
+version.
 If the two are identical, it returns zero.
 Otherwise, it prints an appropriate error in
 .Va devstat_errbuf
-and returns -1.
+and returns \-1.
 .Pp
+The
 .Fn devstat_getdevs
+function
 fetches the current list of devices and statistics into the supplied
-.Va statinfo
+.Vt statinfo
 structure.
 The
-.Va statinfo
+.Vt statinfo
 structure can be found in
 .In devstat.h :
 .Bd -literal -offset indent
@@ -168,9 +170,11 @@ struct statinfo {
 };
 .Ed
 .Pp
+The
 .Fn devstat_getdevs
+function
 expects the
-.Va statinfo
+.Vt statinfo
 structure to be allocated, and it also expects the
 .Va dinfo
 subelement to be allocated and zeroed prior to the first invocation of
@@ -194,17 +198,19 @@ struct devinfo {
 .Pp
 The
 .Va kern.devstat.all
-.Nm sysctl
+.Xr sysctl 8
 variable contains an array of
 .Nm
 structures, but at the head of the array is the current
 .Nm
 generation.
 The reason the generation is at the head of the buffer is so that userland
-software accessing the devstat statistics information can atomically get
+software accessing the
+.Nm
+statistics information can atomically get
 both the statistics information and the corresponding generation number.
 If client software were forced to get the generation number via a separate
-.Nm sysctl
+.Xr sysctl 8
 variable (which is available for convenience), the list of devices could
 change between the time the client gets the generation and the time the
 client gets the device list.
@@ -212,36 +218,39 @@ client gets the device list.
 The
 .Va mem_ptr
 subelement of the
-.Va devinfo
+.Vt devinfo
 structure is a pointer to memory that is allocated, and resized if
 necessary, by
 .Fn devstat_getdevs .
 The devices subelement of the
-.Va devinfo
+.Vt devinfo
 structure is basically a pointer to the beginning of the array of devstat
 structures from the
 .Va kern.devstat.all
-.Nm sysctl
+.Xr sysctl 8
 variable (or the corresponding values read via
 .Xr kvm 3 ) .
 The generation subelement of the
-.Va devinfo
+.Vt devinfo
 structure contains the corresponding generation number.
 The
 .Va numdevs
 subelement of the
-.Va devinfo
+.Vt devinfo
 structure contains the current
 number of devices registered with the kernel
 .Nm
 subsystem.
 .Pp
+The
 .Fn devstat_selectdevs
+function
 selects devices to display based upon a number of criteria:
-.Bl -tag -width flag
+.Bl -tag -width indent
 .It specified devices
 Specified devices are the first selection priority.
-These are generally devices specified by name by the user e.g.\& da0, da1, cd0.
+These are generally devices specified by name by the user e.g.\&
+.Li da0 , da1 , cd0 .
 .It match patterns
 These are pattern matching expressions generated by
 .Fn devstat_buildmatch
@@ -250,7 +259,7 @@ from user input.
 If performance mode is enabled, devices will be sorted based on the
 .Va bytes
 field in the
-.Va device_selection
+.Vt device_selection
 structure passed in to
 .Fn devstat_selectdevs .
 The
@@ -266,50 +275,64 @@ If devices have been selected by name or pattern, the performance tracking
 code will honor those selections and will only sort among the selected
 devices.
 .It order in the devstat list
-If the selection mode is set to DS_SELECT_ADD, and if there are still less
+If the selection mode is set to
+.Dv DS_SELECT_ADD ,
+and if there are still less
 than
-.Va maxshowdevs
+.Fa maxshowdevs
 devices selected,
 .Fn devstat_selectdevs
 will automatically select up to
-.Va maxshowdevs
+.Fa maxshowdevs
 devices.
 .El
 .Pp
+The
 .Fn devstat_selectdevs
+function
 performs selections in four different modes:
-.Bl -tag -width DS_SELECT_ADDONLY
-.It DS_SELECT_ADD
-In add mode,
+.Bl -tag -width ".Dv DS_SELECT_ADDONLY"
+.It Dv DS_SELECT_ADD
+In
+.Dq add
+mode,
 .Fn devstat_selectdevs
 will select any unselected devices specified by name or matching pattern.
 It will also select more devices, in devstat list order, until the number
 of selected devices is equal to
-.Va maxshowdevs
+.Fa maxshowdevs
 or until all devices are
 selected.
-.It DS_SELECT_ONLY
-In only mode,
+.It Dv DS_SELECT_ONLY
+In
+.Dq only
+mode,
 .Fn devstat_selectdevs
 will clear all current selections, and will only select devices specified
 by name or by matching pattern.
-.It DS_SELECT_REMOVE
-In remove mode,
+.It Dv DS_SELECT_REMOVE
+In
+.Dq remove
+mode,
 .Fn devstat_selectdevs
 will remove devices specified by name or by matching pattern.
 It will not select any additional devices.
-.It DS_SELECT_ADDONLY
-In add only mode,
+.It Dv DS_SELECT_ADDONLY
+In
+.Dq "add only"
+mode,
 .Fn devstat_selectdevs
 will select any unselected devices specified by name or matching pattern.
-In this respect it is identical to add mode.
+In this respect it is identical to
+.Dq add
+mode.
 It will not, however, select any devices other than those specified.
 .El
 .Pp
 In all selection modes,
 .Fn devstat_selectdevs
 will not select any more than
-.Va maxshowdevs
+.Fa maxshowdevs
 devices.
 One exception to this is when you are in
 .Dq top
@@ -321,307 +344,341 @@ Client programs must pay attention to selection order when deciding whether
 to pay attention to a particular device.
 This may be the wrong behavior, and probably requires additional thought.
 .Pp
+The
 .Fn devstat_selectdevs
+function
 handles allocation and resizing of the
-.Va dev_select
+.Fa dev_select
 structure passed in
 by the client.
+The
 .Fn devstat_selectdevs
+function
 uses the
-.Va numdevs
+.Fa numdevs
 and
-.Va current_generation
+.Fa current_generation
 fields to track the
 current
 .Nm
 generation and number of devices.
 If
-.Va num_selections
+.Fa num_selections
 is not the same
 as
-.Va numdevs
+.Fa numdevs
 or if
-.Va select_generation
+.Fa select_generation
 is not the same as
-.Va current_generation ,
+.Fa current_generation ,
 .Fn devstat_selectdevs
 will resize the selection list as necessary, and re-initialize the
 selection array.
 .Pp
+The
 .Fn devstat_buildmatch
-take a comma separated match string and compile it into a
-\fBdevstat_match\fR structure that is understood by
-.Fn selectdevs .
+function
+takes a comma separated match string and compiles it into a
+.Vt devstat_match
+structure that is understood by
+.Fn devstat_selectdevs .
 Match strings have the following format:
 .Pp
-.Bd -literal -offset indent
-device,type,if
-.Ed
+.D1 Ar device , Ns Ar type , Ns Ar if
 .Pp
+The
 .Fn devstat_buildmatch
+function
 takes care of allocating and reallocating the match list as necessary.
 Currently known match types include:
-.Pp
-.Bl -tag -width indent -compact
+.Bl -tag -width indent
 .It device type:
-.Bl -tag -width 9n -compact
-.It da
+.Bl -tag -width ".Li enclosure" -compact
+.It Li da
 Direct Access devices
-.It sa
+.It Li sa
 Sequential Access devices
-.It printer
+.It Li printer
 Printers
-.It proc
+.It Li proc
 Processor devices
-.It worm
+.It Li worm
 Write Once Read Multiple devices
-.It cd
+.It Li cd
 CD devices
-.It scanner
+.It Li scanner
 Scanner devices
-.It optical
+.It Li optical
 Optical Memory devices
-.It changer
+.It Li changer
 Medium Changer devices
-.It comm
+.It Li comm
 Communication devices
-.It array
+.It Li array
 Storage Array devices
-.It enclosure
+.It Li enclosure
 Enclosure Services devices
-.It floppy
+.It Li floppy
 Floppy devices
 .El
-.Pp
 .It interface:
-.Bl -tag -width 9n -compact
-.It IDE
+.Bl -tag -width ".Li enclosure" -compact
+.It Li IDE
 Integrated Drive Electronics devices
-.It SCSI
+.It Li SCSI
 Small Computer System Interface devices
-.It other
+.It Li other
 Any other device interface
 .El
-.Pp
 .It passthrough:
-.Bl -tag -width 9n -compact
-.It pass
+.Bl -tag -width ".Li enclosure" -compact
+.It Li pass
 Passthrough devices
 .El
 .El
 .Pp
+The
 .Fn devstat_compute_statistics
+function
 is an updated version of
 .Fn compute_stats
 that provides more complete statistics calculation.
-There are four arguments for which values \fBmust\fR be supplied:
-.Va current ,
-.Va previous ,
-.Va etime ,
+There are four arguments for which values
+.Em must
+be supplied:
+.Fa current ,
+.Fa previous ,
+.Fa etime ,
 and the terminating argument for the varargs list,
-.Va DSM_NONE .
-For most applications, the user will want to supply valid devstat
+.Dv DSM_NONE .
+For most applications, the user will want to supply valid
+.Vt devstat
 structures for both
-.Va current
+.Fa current
 and
-.Va previous .
+.Fa previous .
 In some instances, for instance when calculating statistics since system
-boot, the user may pass in a NULL pointer for the
-.Va previous
+boot, the user may pass in a
+.Dv NULL
+pointer for the
+.Fa previous
 argument.
 In that case,
 .Fn devstat_compute_statistics
 will use the total stats in the
-.Va current
+.Fa current
 structure to calculate statistics over
-.Va etime .
-For each statistic to be calculated, the user should supply the proper
+.Fa etime .
+For each statistics to be calculated, the user should supply the proper
 enumerated type (listed below), and a variable of the indicated type.
-All statistics are either integer values, for which a u_int64_t is used,
-or floating point, for which a long double is used.
+All statistics are either integer values, for which a
+.Vt u_int64_t
+is used,
+or floating point, for which a
+.Vt "long double"
+is used.
 The statistics that may be calculated are:
-.Bl -tag -width DSM_TRANSFERS_PER_SECOND_OTHER
-.It DSM_NONE
+.Bl -tag -width ".Dv DSM_TRANSFERS_PER_SECOND_OTHER"
+.It Dv DSM_NONE
 type: N/A
 .Pp
-This \fBmust\fR
+This
+.Em must
 be the last argument passed to
 .Fn devstat_compute_statistics .
 It is an argument list terminator.
-.It DSM_TOTAL_BYTES
-type: u_int64_t *
+.It Dv DSM_TOTAL_BYTES
+type:
+.Vt "u_int64_t *"
 .Pp
 The total number of bytes transferred between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_TOTAL_BYTES_READ
-.It DSM_TOTAL_BYTES_WRITE
-.It DSM_TOTAL_BYTES_FREE
-type: u_int64_t *
+.Fa current .
+.It Dv DSM_TOTAL_BYTES_READ
+.It Dv DSM_TOTAL_BYTES_WRITE
+.It Dv DSM_TOTAL_BYTES_FREE
+type:
+.Vt "u_int64_t *"
 .Pp
 The total number of bytes in transactions of the specified type
 between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_TOTAL_TRANSFERS
-type: u_int64_t *
+.Fa current .
+.It Dv DSM_TOTAL_TRANSFERS
+type:
+.Vt "u_int64_t *"
 .Pp
 The total number of transfers between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_TOTAL_TRANSFERS_OTHER
-.It DSM_TOTAL_TRANSFERS_READ
-.It DSM_TOTAL_TRANSFERS_WRITE
-.It DSM_TOTAL_TRANSFERS_FREE
-type: u_int64_t *
+.Fa current .
+.It Dv DSM_TOTAL_TRANSFERS_OTHER
+.It Dv DSM_TOTAL_TRANSFERS_READ
+.It Dv DSM_TOTAL_TRANSFERS_WRITE
+.It Dv DSM_TOTAL_TRANSFERS_FREE
+type:
+.Vt "u_int64_t *"
 .Pp
 The total number of transactions of the specified type between
 the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_TOTAL_BLOCKS
-type: u_int64_t *
+.Fa current .
+.It Dv DSM_TOTAL_BLOCKS
+type:
+.Vt "u_int64_t *"
 .Pp
 The total number of blocks transferred between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
+.Fa current .
 This number is in terms of the blocksize reported by the device.
 If no blocksize has been reported (i.e., the block size is 0), a default
 blocksize of 512 bytes will be used in the calculation.
-.It DSM_TOTAL_BLOCKS_READ
-.It DSM_TOTAL_BLOCKS_WRITE
-.It DSM_TOTAL_BLOCKS_FREE
-type: u_int64_t *
+.It Dv DSM_TOTAL_BLOCKS_READ
+.It Dv DSM_TOTAL_BLOCKS_WRITE
+.It Dv DSM_TOTAL_BLOCKS_FREE
+type:
+.Vt "u_int64_t *"
 .Pp
 The total number of blocks of the specified type between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
+.Fa current .
 This number is in terms of the blocksize reported by the device.
 If no blocksize has been reported (i.e., the block size is 0), a default
 blocksize of 512 bytes will be used in the calculation.
-.It DSM_KB_PER_TRANSFER
-type: long double *
+.It Dv DSM_KB_PER_TRANSFER
+type:
+.Vt "long double *"
 .Pp
 The average number of kilobytes per transfer between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_KB_PER_TRANSFER_READ
-.It DSM_KB_PER_TRANSFER_WRITE
-.It DSM_KB_PER_TRANSFER_FREE
-type: long double *
+.Fa current .
+.It Dv DSM_KB_PER_TRANSFER_READ
+.It Dv DSM_KB_PER_TRANSFER_WRITE
+.It Dv DSM_KB_PER_TRANSFER_FREE
+type:
+.Vt "long double *"
 .Pp
 The average number of kilobytes in the specified type transaction between
 the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_TRANSFERS_PER_SECOND
-type: long double *
+.Fa current .
+.It Dv DSM_TRANSFERS_PER_SECOND
+type:
+.Vt "long double *"
 .Pp
 The average number of transfers per second between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_TRANSFERS_PER_SECOND_OTHER
-.It DSM_TRANSFERS_PER_SECOND_READ
-.It DSM_TRANSFERS_PER_SECOND_WRITE
-.It DSM_TRANSFERS_PER_SECOND_FREE
-type: long double *
+.Fa current .
+.It Dv DSM_TRANSFERS_PER_SECOND_OTHER
+.It Dv DSM_TRANSFERS_PER_SECOND_READ
+.It Dv DSM_TRANSFERS_PER_SECOND_WRITE
+.It Dv DSM_TRANSFERS_PER_SECOND_FREE
+type:
+.Vt "long double *"
 .Pp
 The average number of transactions of the specified type per second
 between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_MB_PER_SECOND
-type: long double *
+.Fa current .
+.It Dv DSM_MB_PER_SECOND
+type:
+.Vt "long double *"
 .Pp
 The average number of megabytes transferred per second between the
 acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_MB_PER_SECOND_READ
-.It DSM_MB_PER_SECOND_WRITE
-.It DSM_MB_PER_SECOND_FREE
-type: long double *
+.Fa current .
+.It Dv DSM_MB_PER_SECOND_READ
+.It Dv DSM_MB_PER_SECOND_WRITE
+.It Dv DSM_MB_PER_SECOND_FREE
+type:
+.Vt "long double *"
 .Pp
 The average number of megabytes per second in the specified type of
 transaction between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_BLOCKS_PER_SECOND
-type: long double *
+.Fa current .
+.It Dv DSM_BLOCKS_PER_SECOND
+type:
+.Vt "long double *"
 .Pp
 The average number of blocks transferred per second between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
+.Fa current .
 This number is in terms of the blocksize reported by the device.
 If no blocksize has been reported (i.e., the block size is 0), a default
 blocksize of 512 bytes will be used in the calculation.
-.It DSM_BLOCKS_PER_SECOND_READ
-.It DSM_BLOCKS_PER_SECOND_WRITE
-.It DSM_BLOCKS_PER_SECOND_FREE
-type: long double *
+.It Dv DSM_BLOCKS_PER_SECOND_READ
+.It Dv DSM_BLOCKS_PER_SECOND_WRITE
+.It Dv DSM_BLOCKS_PER_SECOND_FREE
+type:
+.Vt "long double *"
 .Pp
 The average number of blocks per second in the specificed type of transaction
 between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
+.Fa current .
 This number is in terms of the blocksize reported by the device.
 If no blocksize has been reported (i.e., the block size is 0), a default
 blocksize of 512 bytes will be used in the calculation.
-.It DSM_MS_PER_TRANSACTION
-type: long double *
+.It Dv DSM_MS_PER_TRANSACTION
+type:
+.Vt "long double *"
 .Pp
 The average duration of transactions between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_MS_PER_TRANSACTION_OTHER
-.It DSM_MS_PER_TRANSACTION_READ
-.It DSM_MS_PER_TRANSACTION_WRITE
-.It DSM_MS_PER_TRANSACTION_FREE
-type: long double *
+.Fa current .
+.It Dv DSM_MS_PER_TRANSACTION_OTHER
+.It Dv DSM_MS_PER_TRANSACTION_READ
+.It Dv DSM_MS_PER_TRANSACTION_WRITE
+.It Dv DSM_MS_PER_TRANSACTION_FREE
+type:
+.Vt "long double *"
 .Pp
 The average duration of transactions of the specified type between the
 acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_BUSY_PCT
-type: long double *
+.Fa current .
+.It Dv DSM_BUSY_PCT
+type:
+.Vt "long double *"
 .Pp
 The percentage of time the device had one or more transactions outstanding
 between the acquisition of
-.Va previous
+.Fa previous
 and
-.Va current .
-.It DSM_QUEUE_LENGTH
-type: u_int64_t *
+.Fa current .
+.It Dv DSM_QUEUE_LENGTH
+type:
+.Vt "u_int64_t *"
 .Pp
 The number of not yet completed transactions at the time when
-.Va current
+.Fa current
 was acquired.
-.It DSM_SKIP
+.It Dv DSM_SKIP
 type: N/A
 .Pp
 If you do not need a result from
 .Fn devstat_compute_statistics ,
 just put
-.Va DSM_SKIP
+.Dv DSM_SKIP
 as first (type) parameter and
-.Va NULL
+.Dv NULL
 as second parameter.
 This can be useful in scenarios where the statistics to be calculated
 are determined at run time.
@@ -629,33 +686,39 @@ are determined at run time.
 .Pp
 .Fn devstat_compute_etime
 provides an easy way to find the difference in seconds between two
-.Va bintime
+.Vt bintime
 structures.
 This is most commonly used in conjunction with the time recorded by the
 .Fn devstat_getdevs
-function (in struct
-.Va statinfo )
+function (in
+.Vt "struct statinfo" )
 each time it fetches the current
 .Nm
 list.
 .Sh RETURN VALUES
+The
 .Fn devstat_getnumdevs ,
 .Fn devstat_getgeneration ,
 and
 .Fn devstat_getversion
-return the indicated \fBsysctl\fR variable, or -1 if there is an error
+function
+return the indicated sysctl variable, or \-1 if there is an error
 fetching the variable.
 .Pp
+The
 .Fn devstat_checkversion
+function
 returns 0 if the kernel and userland
 .Nm
 versions match.
-If they do not match, it returns -1.
+If they do not match, it returns \-1.
 .Pp
+The
 .Fn devstat_getdevs
 and
 .Fn devstat_selectdevs
-return -1 in case of an error, 0 if there is no error and 1 if the device
+functions
+return \-1 in case of an error, 0 if there is no error, and 1 if the device
 list or selected devices have changed.
 A return value of 1 from
 .Fn devstat_getdevs
@@ -663,14 +726,18 @@ is usually a hint to re-run
 .Fn devstat_selectdevs
 because the device list has changed.
 .Pp
+The
 .Fn devstat_buildmatch
-returns -1 for error, and 0 if there is no error.
+function returns \-1 for error, and 0 if there is no error.
 .Pp
+The
 .Fn devstat_compute_etime
+function
 returns the computed elapsed time.
 .Pp
+The
 .Fn devstat_compute_statistics
-returns -1 for error, and 0 for success.
+function returns \-1 for error, and 0 for success.
 .Pp
 If an error is returned from one of the
 .Nm
@@ -694,7 +761,9 @@ The
 .Nm
 statistics system first appeared in
 .Fx 3.0 .
-The new interface (the functions prefixed with devstat_) first appeared in
+The new interface (the functions prefixed with
+.Li devstat_ )
+first appeared in
 .Fx 5.0 .
 .Sh AUTHORS
 .An Kenneth Merry Aq ken@FreeBSD.org
@@ -705,9 +774,11 @@ There should probably be an interface to de-allocate memory allocated by
 and
 .Fn devstat_buildmatch .
 .Pp
+The
 .Fn devstat_selectdevs
+function
 should probably not select more than
-.Va maxshowdevs
+.Fa maxshowdevs
 devices in
 .Dq top
 mode when no devices have been selected previously.
@@ -716,7 +787,7 @@ There should probably be functions to perform the statistics buffer
 swapping that goes on in most of the clients of this library.
 .Pp
 The
-.Va statinfo
+.Vt statinfo
 and
-.Va devinfo
+.Vt devinfo
 structures should probably be cleaned up and thought out a little more.