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.dea...@arm.com>
Signed-off-by: Marc Zyngier <marc.zyng...@arm.com>
---
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
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