kpause() makes the calling LWP sleep. It's similar to
cv_timedwait_sig(9) without the corresponding
cv_signal(9).
kpause() can wake up spontaneously. Callers should prepare to handle it.
wmesg
Specifies a string of no more than 8 characters that describes the resource or condition associated with the call of
kpause(). The kernel does not use this argument directly but makes it available for utilities such as
ps(1) to display.
intr
If true, sleep interruptably. If the LWP receives a signal, or is interrupted by another condition such as its containing process exiting, the wait is ended early and an error code returned.
timeo
Specify a timeout. It is an architecture and system dependent value related to the number of clock interrupts per second. See
hz(9) for details. The
mstohz(9) macro can be used to convert a timeout expressed in milliseconds to one suitable for
kpause().
Zero means no timeout.
mtx
Convenience and symmetry with other synchronization operations. If not NULL, mtx will be released once the LWP has prepared to sleep, and will be reacquired before kpause() returns.