Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

MFC r244039:

Remove outdated reference to tcp inflight tuning.

MFC r235319:

Remove duplicate words in mdoc(7) pages.

PR: 167810

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Document vfs.ncsizefactor and vfs.ncnegfactor.

MFC after: 2 weeks

Add eventtimers(7) man page, briefly describing event timers subsystem
functionality and configuration options.

Describe vfs.read_max and update vfs.hirunningspace documentation. While
there, update nits.

Considered viewed by: jeff, phk, rwatson

Fixed markup bugs.

Usermode portion of the support for swap allocation accounting:
- update for getrlimit(2) manpage;
- support for setting RLIMIT_SWAP in login class;
- addition to the limits(1) and sh and csh limit-setting builtins;
- tuning(7) documentation on the sysctls controlling overcommit.

In collaboration with: pho
Reviewed by: alc
Approved by: re (kensmith)

A system with plenty of memory would not require so much swap for generic
usage.

Discussed with: dillon

s/use/using/ in previous commit.

Suggested by: jhb

Better description of kern.ipc.maxpipekva.

Discussed with: kib

Add a comment on kern.ipc.maxpipekva.

PR: 105997
Reviewed by: keramida

Clean up after last commit.

Remove traces of vinum and replace with gvinum.
Mention gstripe and gjournal.

Document the loader tunables which control hard process memory limits.

Reviewed by: ru

o Xr sendfile(2).

Use 'manual page' instead of 'man page' for consistency.

Approved by: re (hrs)

IDE_DELAY was only available as an option for the wd driver of PC98.
Now that the driver is gone, `tuning' IDE_DELAY makes no sense.

Submitted by: Joel Dahl joel at automatvapen dot se

Update the description of SCSI_DELAY and annotate IDE_DELAY as a
PC98-only option.

Submitted by: Joel Dahl (joel at automatvapen dot se)
PR: docs/74862
MFC after: 3 days

Remove some references to I386_CPU and 80386 CPUs.

Sync description of IP portrange sysctls with reality.

MFC after: 2 weeks

Expand indirect reference to copyright file to the portion of that file
that is relevant.

The inflight sysctls have moved to net.inet.tcp.inflight.*, so adjust
documentation accordingly.

Correct a couple of language nits and a spelling.

PR: docs/68799
Submitted by: Chris Pepper <pepper@reppep.com>
MFC after: 3 days

Mechanically kill hard sentence breaks and double whitespaces.

s/disklabel/bsdlabel/g
Removed paragraph about "new experimental feature" the hw.ata.tags
which sysctl -a knows nothing about.
Fix typos while I'm here.

PR: docs/66493
Submitted by: Julien Gabel <jpeg@thilelli.net>

Remove invalid statement about the maximum number of swap drives.

PR: docs/55276
Submitted by: Roderick van Domburg <r.s.a.vandomburg@student.utwente.nl>

Assorted mdoc(7), grammar, spelling, and punctuation fixes.

Approved by: re (blanket)

Update sendfile.2 to include a TUNING section that documents the
various tunables that are applicable to sendfile(2). Update tuning.7
to mention a reference to sendfile.2.

Approved by: keramida

english(4) police.

Spelling: s/then/than/ where appropriate.

mdoc(7) police: spelling, removed (scheduled again) hard sentence breaks.

Change tcp.inflight_min from 1024 to a production default of 6144. Create
a sysctl for the stabilization value for the bandwidth delay product (inflight)
algorithm and document it.

MFC after: 3 days

Uniformly refer to a file system as "file system".

Approved by: re

mdoc(7) police: scheduled sweep.

Approved by: re

Cleanup grammer related to PR 40907 and add a section on TCP delayed
acks as suggested by Mike Harding <mvh@ix.netcom.com>

Rearrange a sentence that got stuck in the wrong paragraph.

X-MFC after: (all commits here will be MFCd)

Clear up confusion in a sentence describing [/var]/tmp.

Add a section on the net.inet.ip.portrange.* sysctls.

Suggested by: Mike Harding <mvh@ix.netcom.com>
MFC after: 3 days

Oops, last manual commit was to -stable, should have been to -current.
No biggy, the code MFC to stable will catch up to the docs in a week.

X-MFC after: -7 days

mdoc(7) police: Bump document date, removed (again) hard sentence breaks..

Add sections on vfs.write_behind and vfs.hirunningspace. Also note that
this has already been comitted to stable (the MFC was really through
this commit, not the previous commit).

Remove, with extreme prejudice, the notion that /tmp best needs to be a
softlink to /var/tmp.

This is horribly wrong since /tmp and /var/tmp serve different goals.
Even given the text that in the old days things were different doesn't help,
since our scripts clean /tmp, and we depend on /var/tmp to persist for
vi editing sessions recovery and other likewise applications.

More file system > filesystem

mdoc(7) police: nit.

newfs -U enables softupdates beginning with FreeBSD 4.5.

PR: 33391
Submitted by: Ceri <setantae@submonkey.net>

mdoc(7) police: expand contractions, remove newly introduced
hard sentence break, revert to a proper markup for config(8)
file directives, fix broken xref.

ispell sweep of share/man/man7/*.

o s/softupdates/it/ to reduce over-use of 'softupdates' in a single
paragraph.

o Softupdates is now enabled by default on non-root file systems. Update
language about softupdates to reference this fact, as well as slightly
moderate the "recommend Softupdates for use on all filesystems" to
"most filesystems" so as to be consistent with what sysinstall selects.

o Most users will use sysinstall(8) for partition layout, rather than
disklabel(8), so add a reference to sysinstall(8).

o Expand on the definition of a sysctl, and add cross-references to
rc.conf and sysctl.conf.

MFC after: 3 days

o Refer to hw.ata.wc as a 'loader tunable' rather than a 'kernel variable'
for consistency with the rest of the document. Since we've already
described the properties of loader tunables elsewhere, remove the
duplicate description of it being a boot-time property.

MFC after: 3 days

o Update tuning(7) to reflect auto-tuning of kern.maxusers in recent
versions of FreeBSD. This should be merged before 4.5-RELEASE, as this
functionality is present in 4.5-RELEASE.

MFC after: 3 days

mdoc(7) police: kill the undead whitespace at EOL.

o Various language and style tweaks.

Submitted by: ru

mdoc(7) police: remove the debugging stuff I use to prevent
hyphenation (so that the output could be spell-checked).

Update the default newfs block and fragment sizes from 8192/1024 to
16384/2048.

Following recent discussions on the -arch mailing list, involving dillon
and mckusick, this change parallels the one made over a decade ago when
the default was bumped up from 4096/512.

This should provide significant performance improvements for most
folks, less significant performance losses for a few folks and
wasted space lost to large fragments for many folks.

For discussion, please see the following thread in the -arch archive:

Subject: Using a larger block size on large filesystems

The discussion ceases to be relevant when the issue of partitioning
schemes is raised.

Remove the advice relating to the number of cylinders per cylinder
group. The highest possible value is calculated automatically since
rev 1.41 of src/sbin/newfs.c .

When rfc1323 is mentioned in the context of buffer sizes, not that it
is enabled by default in FreeBSD.

o Add a mention of kern.openfiles to the description of kern.maxfiles,
and suggest using this value to get a sense of the needs of the system.

o Fix spelling of allocations as allocates.

Submitted by: silby

o Reflect changed default such that keepalives are always enabled by
default now. Discuss why that's good. Note that there are still
some situations where turning it off may be advantageous, including
situations where there are network outages and it's desirable to
have TCP sessions last beyond the outage.

Reviewed by: fenner
Suggested by: silby

Moderate the recommendation that TCP keepalives always be turned on;
in some environments, this may result in the early termination of
legitimate TCP sessions during temporary network outages. However,
maintain a strong recommendation that this be used when many network
clients are dialup.

Requested by: fenner

o Add an additional .Pp between the send/recvbuffer comments and
the ones on ipfw. Note to self: why does ipfw/dummynet count as
a sysctl in tuning(7)?

o When describing kern.ipc.nsfbufs, use the slightly less colloquial
"modify" rather than the slightly more colloquial "mess with".

The default values for net.inet.tcp.sendspace and net.inet.tcp.recvspace
have been changed to 32k and 64k respectively.

vmiodirenable is now on by default; reflect that change in default,
and talk more about the reasons to turn it off (restricted memory
environments), and less about why to turn it on.

Reword parts of tuning(7) regarding loader tunables, which are refered
to in the document as "boot-time sysctls". Instead, refer to them as
loader tunables.

mdoc(7) police: fix markup + generic cleanup.

Update tuning so that it mentions maxusers, nmbclusters, and nsfbufs as
tunables in loader.conf rather than just kernel options.

MFC after: 3 days

Note that it might not be a good idea to mount /var 'noatime'.

PR: docs/30675
Submitted by: Eugene M. Kim <gene@nttmcl.com>, and
Giorgos Keramidas <charon@labs.gr>

Update to reflect the fact that net.inet.tcp.rfc1323 is on by default.

mdoc(7) police: protect trailing full stops of abbreviations
with a trailing zero-width space: `e.g.\&'.

Fix assorted typos.

Removed whitespace at end-of-line; no content changes. I simply did
cd src/share; find man[1-9] -type f|xargs perl -pi -e 's/[ \t]+$//'

BTW, what editors are the culprits? I'm using vim and it shows
me whitespace at EOL in troff files with a thick blue block...

Reviewed by: Silence from cvs diff -b
MFC after: 7 days

fix typo: vise versa -> vice versa

PR: 28926
Submitted by: Michael Lucas <mwlucas@blackhelicopters.org>

mdoc(7) police: eliminate warnings.

mdoc(7) police: sort SEE ALSO xrefs.

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

Fix typo: "fending of" -> "fending off"

mdoc(7) police: remove extraneous .Pp before and/or after .Sh.

Fix type-o's, revamp section on the /tmp softlink, add sections for a
couple more sysctl's, add a section on mount options.

Reword the sentence that I screwed up in the last commit.

Submitted by: Erik Trulsson <ertr1013@student.uu.se>

Remove duplicate words.

mdoc(7) police: sort xrefs.

Fix type-o's, update page

Add two new manual pages related to general firewall and tuning issues

Reviewed by: hackers