fix various typos in comments.

Make makelists() a little bit faster.

branches: 1.19.30;
add -d option to disable lockstat

branches: 1.18.2; 1.18.8;
static + __dead

Fix -Wsign-compare issues

Add -x: summarize events, and do not report on lock types.

Report LB_MISC events, for one-off instrumentation.

branches: 1.14.8;
Remove clause 3 and 4 from TNF licenses

Add MI code to support in-kernel preemption. Preemption is deferred by
one of the following:

- Holding kernel_lock (indicating that the code is not MT safe).
- Bracketing critical sections with kpreempt_disable/kpreempt_enable.
- Holding the interrupt priority level above IPL_NONE.

Statistics on kernel preemption are reported via event counters, and
where preemption is deferred for some reason, it's also reported via
lockstat. The LWP priority at which preemption is triggered is tuneable
via sysctl.

branches: 1.12.2;
Do adaptive spinning for rwlocks, but only if the lock is write held and
there are no waiters. This gives a major boost to build.sh on larger
systems as directory vnode locks are exclusive for lookup, but are often
only held for a very short period of time.

This change has the potential to more readily expose lock order reversals
and other types of deadlock.

lockstat: no longer track lockmgr() events.

branches: 1.10.4;
Sort options. Sync -E argument name with man page.

- Increase default number of trace buffers to 10000.
- New options:
-f Trace only by calling functions.
-m Merge call sites within unique functions.
-M Merge lock addresses within unique objects.

Correctly seperate different events for the same type of lock.

lockstat: improve reporting slightly, and fix a bug where the command
could spin while resorting lists.

Tweak output slightly, and fix a bug.

Fix some minor bugs and improve output slightly.

Sort options.

Fix a typo.

Fix an #include.

Add the lockstat command: displays a summary of kernel locking events
recorded over the lifetime of a called program.

Make makelists() a little bit faster.

add -d option to disable lockstat

branches: 1.18.2; 1.18.8;
static + __dead

Fix -Wsign-compare issues

Add -x: summarize events, and do not report on lock types.

Report LB_MISC events, for one-off instrumentation.

branches: 1.14.8;
Remove clause 3 and 4 from TNF licenses

Add MI code to support in-kernel preemption. Preemption is deferred by
one of the following:

- Holding kernel_lock (indicating that the code is not MT safe).
- Bracketing critical sections with kpreempt_disable/kpreempt_enable.
- Holding the interrupt priority level above IPL_NONE.

Statistics on kernel preemption are reported via event counters, and
where preemption is deferred for some reason, it's also reported via
lockstat. The LWP priority at which preemption is triggered is tuneable
via sysctl.

branches: 1.12.2;
Do adaptive spinning for rwlocks, but only if the lock is write held and
there are no waiters. This gives a major boost to build.sh on larger
systems as directory vnode locks are exclusive for lookup, but are often
only held for a very short period of time.

This change has the potential to more readily expose lock order reversals
and other types of deadlock.

lockstat: no longer track lockmgr() events.

branches: 1.10.4;
Sort options. Sync -E argument name with man page.

- Increase default number of trace buffers to 10000.
- New options:
-f Trace only by calling functions.
-m Merge call sites within unique functions.
-M Merge lock addresses within unique objects.

Correctly seperate different events for the same type of lock.

lockstat: improve reporting slightly, and fix a bug where the command
could spin while resorting lists.

Tweak output slightly, and fix a bug.

Fix some minor bugs and improve output slightly.

Sort options.

Fix a typo.

Fix an #include.

Add the lockstat command: displays a summary of kernel locking events
recorded over the lifetime of a called program.