kernel/2182: virtual interval timers always one-shot

[cb@mit.edu]

>Number:         2182
>Category:       kernel
>Synopsis:       virtual interval timers always one-shot
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   unknown
>Arrival-Date:   Sat Nov 17 16:20:01 MST 2001
>Last-Modified:
>Originator:
>Organization:
>Release:
>Environment:
	
	System      : OpenBSD 2.9
	Architecture: OpenBSD.i386
	Machine     : i386
>Description:
	setitimer() correctly sets and interprets the it_value timer and fires
	of a VTALRM.  It never reloads the timer, though.
	Indeed, kern_clock.c doesn't even *reference* the it_interval field.
	This worked before OpenBSD 2.8, but has been broken in 2.8 and 2.9.
>How-To-Repeat:
	Use setitimer() to try to performan any virtual time periodic signal
	generation.  I've only really tried maximum resolution (i.e., using
	just 1 microsec).
>Fix:
	Unknown.  Probably just a little hardclock() hacking.

>Audit-Trail:
>Unformatted: