On Mon, Dec 30, 2024 at 05:07:41PM +0800, Qi Zheng wrote:
Like PMD and PTE level page table, also add statistics for PUD and P4D
page table.
...
diff --git a/arch/s390/include/asm/tlb.h b/arch/s390/include/asm/tlb.h
index e95b2c8081eb8..b946964afce8e 100644
--- a/arch/s390/include/asm/tlb.h
+++ b/arch/s390/include/asm/tlb.h
@@ -110,24 +110,6 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
tlb_remove_ptdesc(tlb, pmd);
}
-/*
- * p4d_free_tlb frees a pud table and clears the CRSTE for the
- * region second table entry from the tlb.
- * If the mm uses a four level page table the single p4d is freed
- * as the pgd. p4d_free_tlb checks the asce_limit against 8PB
- * to avoid the double free of the p4d in this case.
- */
-static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
- unsigned long address)
-{
- if (mm_p4d_folded(tlb->mm))
- return;
- __tlb_adjust_range(tlb, address, PAGE_SIZE);
- tlb->mm->context.flush_mm = 1;
- tlb->freed_tables = 1;
- tlb_remove_ptdesc(tlb, p4d);
-}
-
/*
* pud_free_tlb frees a pud table and clears the CRSTE for the
* region third table entry from the tlb.
@@ -140,11 +122,30 @@ static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
{
if (mm_pud_folded(tlb->mm))
return;
+ pagetable_pud_dtor(virt_to_ptdesc(pud));
tlb->mm->context.flush_mm = 1;
tlb->freed_tables = 1;
tlb->cleared_p4ds = 1;
tlb_remove_ptdesc(tlb, pud);
}
+/*
+ * p4d_free_tlb frees a p4d table and clears the CRSTE for the
+ * region second table entry from the tlb.
+ * If the mm uses a four level page table the single p4d is freed
+ * as the pgd. p4d_free_tlb checks the asce_limit against 8PB
+ * to avoid the double free of the p4d in this case.
+ */
+static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
+ unsigned long address)
+{
+ if (mm_p4d_folded(tlb->mm))
+ return;
+ pagetable_p4d_dtor(virt_to_ptdesc(p4d));
+ __tlb_adjust_range(tlb, address, PAGE_SIZE);
+ tlb->mm->context.flush_mm = 1;
+ tlb->freed_tables = 1;
+ tlb_remove_ptdesc(tlb, p4d);
+}
I understand that you want to sort p.._free_tlb() routines, but please
do not move the code around or make a separate follow-up patch.
Thanks!
