On 5/10/21 2:23 PM, Peter Zijlstra wrote: > On Mon, May 10, 2021 at 10:05:45AM +0530, Anshuman Khandual wrote: >> - select ARCH_ENABLE_SPLIT_PMD_PTLOCK if X86_64 || X86_PAE >> + select ARCH_ENABLE_SPLIT_PMD_PTLOCK if (PGTABLE_LEVELS > 2) && (X86_64 || X86_PAE) > > It's still very early on a Monday, but IIRC this new condition is > identical to the pre-existing one. Did not get it, could you please elaborate ?