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| author | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-05-23 22:58:08 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-24 05:14:14 +0200 |
| commit | 1dbf37e8adf1ab6b82a510d5e69fa676ed9717c4 (patch) | |
| tree | 8d22cae2039dacbd913c9ae45199bcac4a7f2bce /arch/x86_64/Kconfig | |
| parent | i2o: eliminate a peculiar constraint on i2o_max_drivers (diff) | |
| download | linux-1dbf37e8adf1ab6b82a510d5e69fa676ed9717c4.tar.xz linux-1dbf37e8adf1ab6b82a510d5e69fa676ed9717c4.zip | |
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/Kconfig')
| -rw-r--r-- | arch/x86_64/Kconfig | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig index 145bb824b2a8..5ce94430c019 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 |