[src/trunk]: src/share/man/man4 Note that all relatively new x86 systems shou...

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

details:   https://anonhg.NetBSD.org/src/rev/345d3579eafa
branches:  trunk
changeset: 759916:345d3579eafa
user:      jruoho <jruoho%NetBSD.org@localhost>
date:      Mon Dec 20 08:33:09 2010 +0000

description:
Note that all relatively new x86 systems should prefer acpicpu(4).

Also mention that the legacy ENHANCED_SPEEDSTEP and POWERNOW_K8 are known to
be problematic or entirely dysfunctional with new processors.

diffstat:

 share/man/man4/acpicpu.4 |  18 +++++++++++++++---
 1 files changed, 15 insertions(+), 3 deletions(-)

diffs (40 lines):

diff -r 0527dd7fce98 -r 345d3579eafa share/man/man4/acpicpu.4
--- a/share/man/man4/acpicpu.4  Mon Dec 20 08:13:04 2010 +0000
+++ b/share/man/man4/acpicpu.4  Mon Dec 20 08:33:09 2010 +0000
@@ -1,4 +1,4 @@
-.\" $NetBSD: acpicpu.4,v 1.17 2010/08/27 18:05:16 wiz Exp $
+.\" $NetBSD: acpicpu.4,v 1.18 2010/12/20 08:33:09 jruoho Exp $
 .\"
 .\" Coyright (c) 2010 Jukka Ruohonen <jruohonen%iki.fi@localhost>
 .\" All rights reserved.
@@ -24,7 +24,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd August 27, 2010
+.Dd December 20, 2010
 .Dt ACPICPU 4
 .Os
 .Sh NAME
@@ -294,8 +294,20 @@
 .Nm
 and
 .Xr ichlpcib 4
+or
+.Xr piixpcib 4
 provide support for P-states,
-either one but not both may be used.
+the PCI-based interfaces should not be accessed due possible race conditions.
+.Pp
+All relatively new x86 systems should prefer
+.Nm .
+The options noted above are provided for legacy systems.
+The P-state support provided by
+.Dv ENHANCED_SPEEDSTEP
+and
+.Dv POWERNOW_K8
+are known to be either problematic or
+entirely dysfunctional with new x86 processors.
 .Sh SEE ALSO
 .Xr acpi 4 ,
 .Xr acpitz 4 ,