[src/trunk]: src/lib/libc/sys - note its typical usage.

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7621916e7201
branches:  trunk
changeset: 566446:7621916e7201
user:      yamt <yamt%NetBSD.org@localhost>
date:      Sun May 09 11:28:58 2004 +0000

description:
- note its typical usage.
- bump date.

diffstat:

 lib/libc/sys/sa_yield.2 |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (29 lines):

diff -r 26a18c7f3407 -r 7621916e7201 lib/libc/sys/sa_yield.2
--- a/lib/libc/sys/sa_yield.2   Sun May 09 11:26:33 2004 +0000
+++ b/lib/libc/sys/sa_yield.2   Sun May 09 11:28:58 2004 +0000
@@ -1,4 +1,4 @@
-.\"     $NetBSD: sa_yield.2,v 1.3 2004/03/14 20:57:49 wiz Exp $
+.\"     $NetBSD: sa_yield.2,v 1.4 2004/05/09 11:28:58 yamt Exp $
 .\"
 .\" Copyright (c)2004 YAMAMOTO Takashi,
 .\" All rights reserved.
@@ -25,7 +25,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\" ------------------------------------------------------------
-.Dd March 14, 2004
+.Dd May 9, 2004
 .Dt SA_YIELD 2
 .Os
 .Sh NAME
@@ -42,7 +42,9 @@
 .\" ------------------------------------------------------------
 .Sh DESCRIPTION
 .Fn sa_yield
-is used to idle a virtual processor.
+is used to idle a virtual processor on which the calling thread is running.
+It's typically used when the process's userland scheduler has no userland
+thread to run.
 .Pp
 Scheduler activation should be enabled by
 .Fn sa_enable