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Message-ID: <7f2cbb0d-cde7-3ebd-2a82-4ba697b54e07@arm.com>
Date: Thu, 29 Jul 2021 10:23:55 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Gavin Shan <gshan@...hat.com>, linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org, gerald.schaefer@...ux.ibm.com,
aneesh.kumar@...ux.ibm.com, christophe.leroy@...roup.eu,
cai@....pw, catalin.marinas@....com, will@...nel.org,
akpm@...ux-foundation.org, chuhu@...hat.com, shan.gavin@...il.com
Subject: Re: [PATCH v4 02/12] mm/debug_vm_pgtable: Use struct
pgtable_debug_args in basic tests
On 7/27/21 11:43 AM, Gavin Shan wrote:
> This uses struct pgtable_debug_args in the basic test functions. The
> unused variables @pgd_aligned and @p4d_aligned in debug_vm_pgtable()
> are dropped.
>
> Signed-off-by: Gavin Shan <gshan@...hat.com>
> ---
> mm/debug_vm_pgtable.c | 50 +++++++++++++++++++++----------------------
> 1 file changed, 24 insertions(+), 26 deletions(-)
>
> diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
> index 8c7361643166..8498aa180ebc 100644
> --- a/mm/debug_vm_pgtable.c
> +++ b/mm/debug_vm_pgtable.c
> @@ -89,10 +89,10 @@ struct pgtable_debug_args {
> unsigned long fixed_pte_pfn;
> };
>
> -static void __init pte_basic_tests(unsigned long pfn, int idx)
> +static void __init pte_basic_tests(struct pgtable_debug_args *args, int idx)
> {
> pgprot_t prot = protection_map[idx];
> - pte_t pte = pfn_pte(pfn, prot);
> + pte_t pte = pfn_pte(args->fixed_pte_pfn, prot);
> unsigned long val = idx, *ptr = &val;
>
> pr_debug("Validating PTE basic (%pGv)\n", ptr);
> @@ -174,7 +174,7 @@ static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
> }
>
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> -static void __init pmd_basic_tests(unsigned long pfn, int idx)
> +static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx)
> {
> pgprot_t prot = protection_map[idx];
> unsigned long val = idx, *ptr = &val;
> @@ -184,7 +184,7 @@ static void __init pmd_basic_tests(unsigned long pfn, int idx)
> return;
>
> pr_debug("Validating PMD basic (%pGv)\n", ptr);
> - pmd = pfn_pmd(pfn, prot);
> + pmd = pfn_pmd(args->fixed_pmd_pfn, prot);
>
> /*
> * This test needs to be executed after the given page table entry
> @@ -296,7 +296,7 @@ static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
> }
>
> #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
> -static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int idx)
> +static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx)
> {
> pgprot_t prot = protection_map[idx];
> unsigned long val = idx, *ptr = &val;
> @@ -306,7 +306,7 @@ static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int
> return;
>
> pr_debug("Validating PUD basic (%pGv)\n", ptr);
> - pud = pfn_pud(pfn, prot);
> + pud = pfn_pud(args->fixed_pud_pfn, prot);
>
> /*
> * This test needs to be executed after the given page table entry
> @@ -327,7 +327,7 @@ static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int
> WARN_ON(pud_dirty(pud_wrprotect(pud_mkclean(pud))));
> WARN_ON(!pud_dirty(pud_wrprotect(pud_mkdirty(pud))));
>
> - if (mm_pmd_folded(mm))
> + if (mm_pmd_folded(args->mm))
> return;
>
> /*
> @@ -404,7 +404,7 @@ static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
> WARN_ON(!pud_leaf(pud));
> }
> #else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
> -static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int idx) { }
> +static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx) { }
> static void __init pud_advanced_tests(struct mm_struct *mm,
> struct vm_area_struct *vma, pud_t *pudp,
> unsigned long pfn, unsigned long vaddr,
> @@ -414,8 +414,8 @@ static void __init pud_advanced_tests(struct mm_struct *mm,
> static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot) { }
> #endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
> #else /* !CONFIG_TRANSPARENT_HUGEPAGE */
> -static void __init pmd_basic_tests(unsigned long pfn, int idx) { }
> -static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int idx) { }
> +static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx) { }
> +static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx) { }
> static void __init pmd_advanced_tests(struct mm_struct *mm,
> struct vm_area_struct *vma, pmd_t *pmdp,
> unsigned long pfn, unsigned long vaddr,
> @@ -476,7 +476,7 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
> static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot) { }
> #endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
>
> -static void __init p4d_basic_tests(unsigned long pfn, pgprot_t prot)
> +static void __init p4d_basic_tests(struct pgtable_debug_args *args)
> {
> p4d_t p4d;
>
> @@ -485,7 +485,7 @@ static void __init p4d_basic_tests(unsigned long pfn, pgprot_t prot)
> WARN_ON(!p4d_same(p4d, p4d));
> }
>
> -static void __init pgd_basic_tests(unsigned long pfn, pgprot_t prot)
> +static void __init pgd_basic_tests(struct pgtable_debug_args *args)
> {
> pgd_t pgd;
>
> @@ -890,7 +890,7 @@ static void __init swap_migration_tests(void)
> }
>
> #ifdef CONFIG_HUGETLB_PAGE
> -static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot)
> +static void __init hugetlb_basic_tests(struct pgtable_debug_args *args)
> {
> struct page *page;
> pte_t pte;
> @@ -900,21 +900,21 @@ static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot)
> * Accessing the page associated with the pfn is safe here,
> * as it was previously derived from a real kernel symbol.
> */
> - page = pfn_to_page(pfn);
> - pte = mk_huge_pte(page, prot);
> + page = pfn_to_page(args->fixed_pmd_pfn);
> + pte = mk_huge_pte(page, args->page_prot);
>
> WARN_ON(!huge_pte_dirty(huge_pte_mkdirty(pte)));
> WARN_ON(!huge_pte_write(huge_pte_mkwrite(huge_pte_wrprotect(pte))));
> WARN_ON(huge_pte_write(huge_pte_wrprotect(huge_pte_mkwrite(pte))));
>
> #ifdef CONFIG_ARCH_WANT_GENERAL_HUGETLB
> - pte = pfn_pte(pfn, prot);
> + pte = pfn_pte(args->fixed_pmd_pfn, args->page_prot);
>
> WARN_ON(!pte_huge(pte_mkhuge(pte)));
> #endif /* CONFIG_ARCH_WANT_GENERAL_HUGETLB */
> }
> #else /* !CONFIG_HUGETLB_PAGE */
> -static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot) { }
> +static void __init hugetlb_basic_tests(struct pgtable_debug_args *args) { }
> #endif /* CONFIG_HUGETLB_PAGE */
>
> #ifdef CONFIG_TRANSPARENT_HUGEPAGE
> @@ -1240,7 +1240,7 @@ static int __init debug_vm_pgtable(void)
> pgprot_t prot, protnone;
> phys_addr_t paddr;
> unsigned long vaddr, pte_aligned, pmd_aligned;
> - unsigned long pud_aligned, p4d_aligned, pgd_aligned;
> + unsigned long pud_aligned;
> spinlock_t *ptl = NULL;
> int idx, ret;
>
> @@ -1283,8 +1283,6 @@ static int __init debug_vm_pgtable(void)
> pte_aligned = (paddr & PAGE_MASK) >> PAGE_SHIFT;
> pmd_aligned = (paddr & PMD_MASK) >> PAGE_SHIFT;
> pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT;
> - p4d_aligned = (paddr & P4D_MASK) >> PAGE_SHIFT;
> - pgd_aligned = (paddr & PGDIR_MASK) >> PAGE_SHIFT;
> WARN_ON(!pfn_valid(pte_aligned));
>
> pgdp = pgd_offset(mm, vaddr);
> @@ -1318,9 +1316,9 @@ static int __init debug_vm_pgtable(void)
> * given page table entry.
> */
> for (idx = 0; idx < ARRAY_SIZE(protection_map); idx++) {
> - pte_basic_tests(pte_aligned, idx);
> - pmd_basic_tests(pmd_aligned, idx);
> - pud_basic_tests(mm, pud_aligned, idx);
> + pte_basic_tests(&args, idx);
> + pmd_basic_tests(&args, idx);
> + pud_basic_tests(&args, idx);
> }
>
> /*
> @@ -1330,8 +1328,8 @@ static int __init debug_vm_pgtable(void)
> * the above iteration for now to save some test execution
> * time.
> */
> - p4d_basic_tests(p4d_aligned, prot);
> - pgd_basic_tests(pgd_aligned, prot);
> + p4d_basic_tests(&args);
> + pgd_basic_tests(&args);
>
> pmd_leaf_tests(pmd_aligned, prot);
> pud_leaf_tests(pud_aligned, prot);
> @@ -1360,7 +1358,7 @@ static int __init debug_vm_pgtable(void)
> pmd_thp_tests(pmd_aligned, prot);
> pud_thp_tests(pud_aligned, prot);
>
> - hugetlb_basic_tests(pte_aligned, prot);
> + hugetlb_basic_tests(&args);
>
> /*
> * Page table modifying tests. They need to hold
>
Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
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