update after yamt-idlelwp merge.

share/man/man9/cpu_need_resched.9

@@ -1,4 +1,4 @@
-.\"     $NetBSD: cpu_need_resched.9,v 1.4 2007/02/17 17:35:52 yamt Exp $
+.\"     $NetBSD: cpu_need_resched.9,v 1.5 2007/05/17 15:06:25 yamt Exp $
 .\"
 .\" Copyright (c) 2002 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -34,24 +34,39 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd February 18, 2007
+.Dd May 18, 2007
 .Dt CPU_NEED_RESCHED 9
 .Os
 .Sh NAME
 .Nm cpu_need_resched
 .Nd context switch notification
 .Sh SYNOPSIS
-.In sys/proc.h
+.In sys/cpu.h
 .Ft void
-.Fn cpu_need_resched "struct cpu_info *ci"
+.Fn cpu_need_resched "struct cpu_info *ci" "int flags"
 .Sh DESCRIPTION
 The
 .Fn cpu_need_resched
 function is the machine-independent interface for the scheduler to
 notify machine-dependent code that a context switch from the current
-LWP is required.
+LWP, on the cpu
+.Fa ci ,
+is required.
 This event may occur if a higher priority LWP appears on the run
 queue or if the current LWP has exceeded its time slice.
+.Pp
+If
+.Dv
+RESCHED_IMMED
+flag is specified in
+.Fa flags ,
+machine-dependent code should make a context switch happen as soon as possible.
+In that case, for example, if
+.Fa ci
+is not the current processor,
+.Fn cpu_need_resched
+typically issues an inter processor call to the processor to make it
+notice the need of a context switch as soon as possible.
 .Sh EXAMPLES
 Specifically, the
 .Fn cpu_need_resched