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authorStefan Richter <stefanr@s5r6.in-berlin.de>2007-05-23 13:58:08 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-23 20:14:14 -0700
commit1dbf37e8adf1ab6b82a510d5e69fa676ed9717c4 (patch)
tree8d22cae2039dacbd913c9ae45199bcac4a7f2bce /arch/x86_64
parent82cd0e8410ae74d3fd39d168049381eafc489e5b (diff)
downloadlinux-2.6.34-ux500-1dbf37e8adf1ab6b82a510d5e69fa676ed9717c4.tar.gz
i386, x86-64: show that CONFIG_HOTPLUG_CPU is required for suspend on SMP
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@s5r6.in-berlin.de> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/Kconfig7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 145bb824b2a..5ce94430c01 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -428,12 +428,15 @@ 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