[Xen-devel] [PATCH] linux-xencommons: Load xen-acpi-processor

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

# HG changeset patch
# User Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
# Date 1332510356 14400
# Node ID bb3ac8aac229dc1f0fc5e2db7e69604ab41e5528
# Parent  0ecb8ffe61b2ffff4331fcf49487c956ccb297a0
linux-xencommons: Load xen-acpi-processor

Upstream the "xen/acpi-processor: C and P-state driver that
uploads said data to hypervisor." takes care of uploading power information
information that normally a cpu frequency scaling driver would using
in the initial domain. We want the hypervisor to take that data and
make good usage of it.

Fortunatly for us we do not have to worry about the native cpu frequency
scaling drivers being loaded first, as the upstream commit:
"xen/cpufreq: Disable the cpu frequency scaling drivers from loading."
takes care of that. Meaning we can load the xen-acpi-processor at any time.

By default that driver is built as a module - and since we are
the only user of it - we should load it.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

diff -r 0ecb8ffe61b2 -r bb3ac8aac229 tools/hotplug/Linux/init.d/xencommons
--- a/tools/hotplug/Linux/init.d/xencommons     Thu Mar 22 17:15:22 2012 +0000
+++ b/tools/hotplug/Linux/init.d/xencommons     Fri Mar 23 09:45:56 2012 -0400
@@ -58,6 +58,7 @@ do_start () {
        modprobe xen-gntdev 2>/dev/null
        modprobe evtchn 2>/dev/null
        modprobe gntdev 2>/dev/null
+       modprobe xen-acpi-processor 2>/dev/null
        mkdir -p /var/run/xen
 
        if ! `xenstore-read -s / >/dev/null 2>&1`



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