Re: [PATCH v4 04/15] mm: pgtable: add statistics for P4D level page table

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On 2025/1/3 00:53, Kevin Brodsky wrote:
On 30/12/2024 10:07, Qi Zheng wrote:
diff --git a/arch/riscv/include/asm/pgalloc.h b/arch/riscv/include/asm/pgalloc.h
index 551d614d3369c..3466fbe2e508d 100644
--- a/arch/riscv/include/asm/pgalloc.h
+++ b/arch/riscv/include/asm/pgalloc.h
@@ -108,8 +108,12 @@ static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
  static inline void __p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
  				  unsigned long addr)
  {
-	if (pgtable_l5_enabled)
+	if (pgtable_l5_enabled) {
+		struct ptdesc *ptdesc = virt_to_ptdesc(p4d);
+
+		pagetable_p4d_dtor(ptdesc);
  		riscv_tlb_remove_ptdesc(tlb, virt_to_ptdesc(p4d));

Nit: could use the new ptdesc variable here instead of calling
virt_to_ptdesc().

Right, but we will remove pagetable_p4d_dtor() in patch #10, so this
may not matter.

Thanks!


- Kevin




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