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Message-ID: <bb366c97-fa17-48dc-c594-b79d6256b23c@huawei.com>
Date: Mon, 19 Apr 2021 14:12:23 +0800
From: Liu Shixin <liushixin2@...wei.com>
To: Anshuman Khandual <anshuman.khandual@....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
Thanks for your advice. I will fix these patches and resend them as soon as possilble.
On 2021/4/19 11:30, Anshuman Khandual wrote:
>
> 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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