If the host kernel is configured with CONFIG_TRANSPARENT_HUGEPAGE_MADVISE, it is important to madvise(MADV_HUGEPAGE) the memory region. Otherwise, the guest won't benefit from using THP. Acked-by: Will Deacon <will.deacon@xxxxxxx> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> --- tools/kvm/arm/kvm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/kvm/arm/kvm.c b/tools/kvm/arm/kvm.c index d0d64ff..58ad9fa 100644 --- a/tools/kvm/arm/kvm.c +++ b/tools/kvm/arm/kvm.c @@ -79,7 +79,7 @@ void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size) SZ_2M); madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size, - MADV_MERGEABLE); + MADV_MERGEABLE | MADV_HUGEPAGE); /* Initialise the virtual GIC. */ if (gic__init_irqchip(kvm)) -- 1.8.3.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
