On 03.04.19 06:30, Anshuman Khandual wrote: > Sysfs memory probe interface (/sys/devices/system/memory/probe) can accept > starting physical address of an entire memory block to be hot added into > the kernel. This is in addition to the existing ACPI based interface. This > just enables it with the required config CONFIG_ARCH_MEMORY_PROBE. >
We recently discussed that the similar interface for removal should rather be moved to a debug/test module I wonder if we should try to do the same for the sysfs probing interface. Rather try to get rid of it than open the doors for more users. > Signed-off-by: Anshuman Khandual <anshuman.khand...@arm.com> > --- > arch/arm64/Kconfig | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 7e34b9e..a2418fb 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -266,6 +266,15 @@ config HAVE_GENERIC_GUP > config ARCH_ENABLE_MEMORY_HOTPLUG > def_bool y > > +config ARCH_MEMORY_PROBE > + bool "Enable /sys/devices/system/memory/probe interface" > + depends on MEMORY_HOTPLUG > + help > + This option enables a sysfs /sys/devices/system/memory/probe > + interface for testing. See Documentation/memory-hotplug.txt > + for more information. If you are unsure how to answer this > + question, answer N. > + > config SMP > def_bool y > > -- Thanks, David / dhildenb
