Re: [PATCH 04/10] KVM: Avoid pfn_to_page() and vice versa when releasing pages

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On 4/29/22 03:04, Sean Christopherson wrote:
-
+/*
+ * Note, checking for an error/noslot pfn is the caller's responsibility when
+ * directly marking a page dirty/accessed.  Unlike the "release" helpers, the
+ * "set" helpers are not to be unused when the pfn might point at garbage.
+ */

s/unused/unused/

But while at it, I'd rather add a WARN_ON(is_error_noslot_pfn(pfn)).

Paolo

  void kvm_set_pfn_dirty(kvm_pfn_t pfn)
  {
-	if (kvm_is_ad_tracked_pfn(pfn))
-		SetPageDirty(pfn_to_page(pfn));
+	if (pfn_valid(pfn))
+		kvm_set_page_dirty(pfn_to_page(pfn));
  }
  EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty);
void kvm_set_pfn_accessed(kvm_pfn_t pfn)
  {
-	if (kvm_is_ad_tracked_pfn(pfn))
-		mark_page_accessed(pfn_to_page(pfn));
+	if (pfn_valid(pfn))
+		kvm_set_page_accessed(pfn_to_page(pfn));
  }
  EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed);




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