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Message-ID: <a0962789-9238-9900-c7cb-41c41eb1d916@arm.com>
Date: Mon, 19 Apr 2021 09:00:12 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: Shixin Liu <liushixin2@...wei.com>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next v2 1/2] mm/debug_vm_pgtable: Move
{pmd/pud}_huge_tests out of CONFIG_TRANSPARENT_HUGEPAGE
On 4/9/21 9:35 AM, Anshuman Khandual wrote:
>
> On 4/6/21 10:18 AM, Shixin Liu wrote:
>> v1->v2:
>> Modified the commit message.
>
> Please avoid change log in the commit message, it should be after '---'
> below the SOB statement.
>
>>
>> The functions {pmd/pud}_set_huge and {pmd/pud}_clear_huge ars not dependent on THP.
>
> typo ^^^^^ s/ars/are
>
> Also there is a checkpatch.pl warning.
>
> WARNING: Possible unwrapped commit description (prefer a maximum 75 chars per line)
> #10:
> The functions {pmd/pud}_set_huge and {pmd/pud}_clear_huge ars not dependent on THP.
>
> total: 0 errors, 1 warnings, 121 lines checked
>
> As I had mentioned in the earlier version, the commit message should be some
> thing like ..
>
> ----
> The functions {pmd/pud}_set_huge and {pmd/pud}_clear_huge are not dependent
> on THP. Hence move {pmd/pud}_huge_tests out of CONFIG_TRANSPARENT_HUGEPAGE.
> ----
>
>>
>> Signed-off-by: Shixin Liu <liushixin2@...wei.com>
>> ---
>> mm/debug_vm_pgtable.c | 91 +++++++++++++++++++------------------------
>> 1 file changed, 39 insertions(+), 52 deletions(-)
>>
>> diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
>> index 05efe98a9ac2..d3cf178621d9 100644
>> --- a/mm/debug_vm_pgtable.c
>> +++ b/mm/debug_vm_pgtable.c
>> @@ -242,29 +242,6 @@ static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot)
>> WARN_ON(!pmd_leaf(pmd));
>> }
>>
>> -#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
>> -static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
>> -{
>> - pmd_t pmd;
>> -
>> - if (!arch_vmap_pmd_supported(prot))
>> - return;
>> -
>> - pr_debug("Validating PMD huge\n");
>> - /*
>> - * X86 defined pmd_set_huge() verifies that the given
>> - * PMD is not a populated non-leaf entry.
>> - */
>> - WRITE_ONCE(*pmdp, __pmd(0));
>> - WARN_ON(!pmd_set_huge(pmdp, __pfn_to_phys(pfn), prot));
>> - WARN_ON(!pmd_clear_huge(pmdp));
>> - pmd = READ_ONCE(*pmdp);
>> - WARN_ON(!pmd_none(pmd));
>> -}
>> -#else /* CONFIG_HAVE_ARCH_HUGE_VMAP */
>> -static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot) { }
>> -#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
>> -
>> static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
>> {
>> pmd_t pmd = pfn_pmd(pfn, prot);
>> @@ -379,30 +356,6 @@ static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
>> pud = pud_mkhuge(pud);
>> WARN_ON(!pud_leaf(pud));
>> }
>> -
>> -#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
>> -static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
>> -{
>> - pud_t pud;
>> -
>> - if (!arch_vmap_pud_supported(prot))
>> - return;
>> -
>> - pr_debug("Validating PUD huge\n");
>> - /*
>> - * X86 defined pud_set_huge() verifies that the given
>> - * PUD is not a populated non-leaf entry.
>> - */
>> - WRITE_ONCE(*pudp, __pud(0));
>> - WARN_ON(!pud_set_huge(pudp, __pfn_to_phys(pfn), prot));
>> - WARN_ON(!pud_clear_huge(pudp));
>> - pud = READ_ONCE(*pudp);
>> - WARN_ON(!pud_none(pud));
>> -}
>> -#else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
>> -static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot) { }
>> -#endif /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
>> -
>> #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_advanced_tests(struct mm_struct *mm,
>> @@ -412,9 +365,6 @@ static void __init pud_advanced_tests(struct mm_struct *mm,
>> {
>> }
>> static void __init pud_leaf_tests(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_TRANSPARENT_HUGEPAGE_PUD */
>> #else /* !CONFIG_TRANSPARENT_HUGEPAGE */
>> static void __init pmd_basic_tests(unsigned long pfn, int idx) { }
>> @@ -433,14 +383,51 @@ static void __init pud_advanced_tests(struct mm_struct *mm,
>> }
>> static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot) { }
>> static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot) { }
>> +static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot) { }
>> +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
>> +
>> +#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
>> static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
>> {
>> + pmd_t pmd;
>> +
>> + if (!arch_vmap_pmd_supported(prot))
>> + return;
>> +
>> + pr_debug("Validating PMD huge\n");
>> + /*
>> + * X86 defined pmd_set_huge() verifies that the given
>> + * PMD is not a populated non-leaf entry.
>> + */
>> + WRITE_ONCE(*pmdp, __pmd(0));
>> + WARN_ON(!pmd_set_huge(pmdp, __pfn_to_phys(pfn), prot));
>> + WARN_ON(!pmd_clear_huge(pmdp));
>> + pmd = READ_ONCE(*pmdp);
>> + WARN_ON(!pmd_none(pmd));
>> }
>> +
>> static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
>> {
>> + pud_t pud;
>> +
>> + if (!arch_vmap_pud_supported(prot))
>> + return;
>> +
>> + pr_debug("Validating PUD huge\n");
>> + /*
>> + * X86 defined pud_set_huge() verifies that the given
>> + * PUD is not a populated non-leaf entry.
>> + */
>> + WRITE_ONCE(*pudp, __pud(0));
>> + WARN_ON(!pud_set_huge(pudp, __pfn_to_phys(pfn), prot));
>> + WARN_ON(!pud_clear_huge(pudp));
>> + pud = READ_ONCE(*pudp);
>> + WARN_ON(!pud_none(pud));
>> }
>> -static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot) { }
>> -#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
>> +#else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
>> +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)
>> {
>>
>
> With changes to the commit message as suggested earlier.
>
> Reviewed-by: Anshuman Khandual <anshuman.khandual@....com>
>
Hello Shixin,
Wondering if you are planning to respin the series ?
- Anshuman
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