On 29/04/21 14:46, Shahin, Md Shahadat Hossain wrote:
Large pages not being created properly may result in increased memory
access time. The 'lpages' kvm stat used to keep track of the current
number of large pages in the system, but with TDP MMU enabled the stat
is not showing the correct number.
This patch extends the lpages counter to cover the TDP case.
Signed-off-by: Md Shahadat Hossain Shahin <shahinmd@xxxxxxxxx>
Cc: Bartosz Szczepanek <bsz@xxxxxxxxx>
---
arch/x86/kvm/mmu/tdp_mmu.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 34207b874886..1e2a3cb33568 100644
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -425,6 +425,12 @@ static void __handle_changed_spte(struct kvm *kvm, int as_id, gfn_t gfn,
if (old_spte == new_spte)
return;
+
+ if (is_large_pte(old_spte))
+ --kvm->stat.lpages;
+
+ if (is_large_pte(new_spte))
+ ++kvm->stat.lpages;
trace_kvm_tdp_mmu_spte_changed(as_id, gfn, level, old_spte, new_spte);
Queued, thanks.
Paolo
