Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

New devstat metrics for devstat_compute_statistics():

DSM_TOTAL_DURATION
DSM_TOTAL_DURATION_READ
DSM_TOTAL_DURATION_WRITE
DSM_TOTAL_DURATION_FREE
DSM_TOTAL_DURATION_OTHER
DSM_TOTAL_BUSY_TIME

Globally replace u_int*_t from (non-contributed) man pages.

The reasoning behind this, is that if we are consistent in our
documentation about the uint*_t stuff, people will be less tempted to
write new code that uses the non-standard types.

I am not going to bump the man page dates, as these changes can be
considered style nits. The meaning of the man pages is unaffected.

MFC after: 1 month

Spelling fixes.

Remove a reference to compute_stats(), since it is no longer documented at
least.

Submitted by: osa
MFC after: 1 week

sync function prototype with reality.

Tidy up the markup.

Approved by: re (blanket manpages)

Mechanically kill hard sentence breaks.

mdoc(7): Use the new feature of the .In macro.

Assorted mdoc(7) fixes.

Approved by: re (blanket)

Update to match reality closer.

Don't tell people to include <sys/dkstat.h> any more.

Pointed out by: kuriyama

Fixed wrong arg type in synopsis.

mdoc(7) police: Use the new .In macro for #include statements.

Remove a duplicate "that".

Submitted by: "Sergey A. Osokin" <osa@freebsd.org.ru>

mdoc(7) police: Fixed broken xrefs.

Implement compute_stats() in terms of devstat_compute_statistics(). This
gets rid of the duplicated code in compute_stats().

Add a new DSM_SKIP statistic type for devstat_compute_statistics() that
causes the subsequent variable argument to be skipped.

Thanks to Sergey Osokin for coding up my idea/code fragment.

Submitted by: "Sergey A. Osokin" <osa@freebsd.org.ru>

Add some features to libdevstat, and overhaul the interface a bit:

1.) prefix all functions in the library with devstat_ (compatability
functions are available for all functions that were chaned in an
incompatible way, but are deprecated).
2.) Add a pointer to a kvm_t as the first argument to functions that
used to get their information via sysctl; they behave the same
as before when NULL is passed as this argument, otherwise, the
information is obtained via libkvm using the supplied handle.
3.) Add a new function, devstat_compute_statistics(), that is intended
to replace the old compute_stats() function. It offers more
statistics data, and has a more flexible interface.

libdevstat does now require libkvm; a library depedency is added, so
that libkvm only needs to be explicitely specified for statically linked
programs.
The library major version number is bumped.

Submitted by: Sergey A. Osokin <osa@freebsd.org.ru>, ken (3)
Reviewed by: ken

Remove whitespace at EOL.

mdoc(7) police: removed HISTORY info from the .Os call.

mdoc(7) police: split punctuation characters + misc fixes.

Prepare for mdoc(7)NG.

mdoc(7) police: removed history info from the .Os FreeBSD call.

mdoc(7) police: use the new features of the Nm macro.

Introduce .Lb macro to libdevstat library manpage

Clarify what getdevs() expects as input.

Prompted by: grog

Synchronization of NAME and SINOPSYS sections.
mdoc(7)'fy

$Id$ -> $FreeBSD$

Fixed missing header in synopsis (<devstat.h> unfortunately depends on
<sys/dkstat.h>).

spell check

Change the devstat generation number from an int to a long. The int-sized
generation was causing unaligned access faults on the Alpha.

I have incremented the devstat version number, since this is an interface
change. You'll need to recompile libdevstat, systat, iostat, vmstat and
rpc.rstatd along with your kernel.

Partially Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>

Device statistics library. Used by iostat, vmstat, and systat to
format and analyze the output of the new device statistics sysctls.

Submitted by: "Kenneth D. Merry" <ken@FreeBSD.org>