linux-kernel - Re: [RFC PATCH 1/3] mm/thp: Use pmdp_splitting_flush

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Date:	Thu, 30 Apr 2015 21:29:48 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	akpm@...ux-foundation.org, paulus@...ba.org,
	benh@...nel.crashing.org, kirill.shutemov@...ux.intel.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/3] mm/thp: Use pmdp_splitting_flush_notify to clear pmd on splitting

"Kirill A. Shutemov" <kirill@...temov.name> writes:

>> @@ -184,3 +185,13 @@ void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
>>  }
>>  #endif /* CONFIG_TRANSPARENT_HUGEPAGE */
>>  #endif
>> +
>> +#ifndef __HAVE_ARCH_PMDP_SPLITTING_FLUSH_NOTIFY
>> +#ifdef CONFIG_TRANSPARENT_HUGEPAGE
>> +void pmdp_splitting_flush_notify(struct vm_area_struct *vma,
>> +				 unsigned long address, pmd_t *pmdp)
>> +{
>> +	pmdp_clear_flush_notify(vma, address, pmdp);
>> +}
>> +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
>> +#endif
>
> I think it worth inlining. Let's put it to <asm-generic/pgtable.h>
>
> It probably worth combining with collapse counterpart in the same patch.
>

I tried that first, But that pulls in mmu_notifier.h and huge_mm.h
headers and other build failures

-aneesh

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