The patch titled
i386, x86-64: show that CONFIG_HOTPLUG_CPU is required for suspend on SMP
has been added to the -mm tree. Its filename is
i386-x86-64-show-that-config_hotplug_cpu-is-required-for-suspend-on-smp.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: i386, x86-64: show that CONFIG_HOTPLUG_CPU is required for suspend on SMP
From: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
It's not sufficiently documented that CONFIG_HOTPLUG_CPU is required for
suspend/hibernation on SMP.
Point out the non-obvious.
Signed-off-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/Kconfig | 2 +-
arch/x86_64/Kconfig | 7 +++++--
2 files changed, 6 insertions(+), 3 deletions(-)
diff -puN arch/i386/Kconfig~i386-x86-64-show-that-config_hotplug_cpu-is-required-for-suspend-on-smp arch/i386/Kconfig
--- a/arch/i386/Kconfig~i386-x86-64-show-that-config_hotplug_cpu-is-required-for-suspend-on-smp
+++ a/arch/i386/Kconfig
@@ -891,7 +891,7 @@ config PHYSICAL_ALIGN
Don't change this unless you know what you are doing.
config HOTPLUG_CPU
- bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
+ bool "Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)"
depends on SMP && HOTPLUG && EXPERIMENTAL && !X86_VOYAGER
---help---
Say Y here to experiment with turning CPUs off and on, and to
diff -puN arch/x86_64/Kconfig~i386-x86-64-show-that-config_hotplug_cpu-is-required-for-suspend-on-smp arch/x86_64/Kconfig
--- a/arch/x86_64/Kconfig~i386-x86-64-show-that-config_hotplug_cpu-is-required-for-suspend-on-smp
+++ a/arch/x86_64/Kconfig
@@ -436,12 +436,15 @@ config NR_CPUS
memory in the static kernel configuration.
config HOTPLUG_CPU
- bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
+ bool "Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)"
depends on SMP && HOTPLUG && EXPERIMENTAL
help
Say Y here to experiment with turning CPUs off and on. CPUs
can be controlled through /sys/devices/system/cpu/cpu#.
- Say N if you want to disable CPU hotplug.
+ This is also required for suspend/hibernation on SMP systems.
+
+ Say N if you want to disable CPU hotplug and don't need to
+ suspend.
config ARCH_ENABLE_MEMORY_HOTPLUG
def_bool y
_
Patches currently in -mm which might be from stefanr@xxxxxxxxxxxxxxxxx are
git-ieee1394.patch
i386-x86-64-show-that-config_hotplug_cpu-is-required-for-suspend-on-smp.patch
-
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