32 bit support is broken in various ways: for example, we can online memory that should actually go to ZONE_HIGHMEM to ZONE_MOVABLE or in some cases even to one of the other kernel zones.
We marked it BROKEN in commit b59d02ed0869 ("mm/memory_hotplug: disable the functionality for 32b") almost one year ago. According to that commit it might be broken at least since 2017. Further, there is hardly a sane use case nowadays.
Let's just depend completely on 64bit, dropping the "BROKEN" dependency to make clear that we are not going to support it again. Next, we'll remove some HIGHMEM leftovers from memory hotplug code to clean up.
Signed-off-by: David Hildenbrand david@redhat.com --- mm/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/Kconfig b/mm/Kconfig index ea8762cd8e1e..88273dd5c6d6 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -125,7 +125,7 @@ config MEMORY_HOTPLUG select MEMORY_ISOLATION depends on SPARSEMEM depends on ARCH_ENABLE_MEMORY_HOTPLUG - depends on 64BIT || BROKEN + depends on 64BIT select NUMA_KEEP_MEMINFO if NUMA
config MEMORY_HOTPLUG_DEFAULT_ONLINE