On 2018-11-13 at 05:02 Pankaj Gupta <pagupta@xxxxxxxxxx> wrote:
> As this patch is dependent on PageReserved patch(which is in progress), just
> wondering if we are able to test the code path for hugepage with DAX.
For testing, I used the following patch. It's not 100%, since it
intercepts at kvm_is_reserved_pfn(), and not PageReserved() directly.
The only difference is with kvm_set_pfn_dirty() I think.
I also have a nasty module that would dump the EPT's and the host page
table's mappings so I could confirm that the huge pages are being mapped
correctly.
-----------------------
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2679e476b6c3..1b394a0752a0 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -148,6 +148,10 @@ __weak int kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
bool kvm_is_reserved_pfn(kvm_pfn_t pfn)
{
+ // XXX hack
+ if (is_zone_device_page(pfn_to_page(pfn)))
+ return false;
+
if (pfn_valid(pfn))
return PageReserved(pfn_to_page(pfn));
-----------------------
Thanks,
Barret
