On 10/21/22 16:36, James Houghton wrote: > This adds the Kconfig to enable or disable high-granularity mapping. > Each architecture must explicitly opt-in to it (via > ARCH_WANT_HUGETLB_HIGH_GRANULARITY_MAPPING), but when opted in, HGM will > be enabled by default if HUGETLB_PAGE is enabled. > > Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx> > --- > fs/Kconfig | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/fs/Kconfig b/fs/Kconfig > index 2685a4d0d353..ce2567946016 100644 > --- a/fs/Kconfig > +++ b/fs/Kconfig > @@ -267,6 +267,13 @@ config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON > enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off > (boot command line) or hugetlb_optimize_vmemmap (sysctl). > > +config ARCH_WANT_HUGETLB_HIGH_GRANULARITY_MAPPING > + bool > + > +config HUGETLB_HIGH_GRANULARITY_MAPPING > + def_bool HUGETLB_PAGE > + depends on ARCH_WANT_HUGETLB_HIGH_GRANULARITY_MAPPING Might also need to make this depend on CONFIG_ARCH_WANT_HUGE_PMD_SHARE as the vma local allocation will only happen in this case. -- Mike Kravetz > + > config MEMFD_CREATE > def_bool TMPFS || HUGETLBFS > > -- > 2.38.0.135.g90850a2211-goog >
