On 02/13/2019 07:08 PM, Michal Hocko wrote:
> On Wed 13-02-19 18:20:03, Anshuman Khandual wrote:
>> On 02/12/2019 02:03 PM, Kirill A. Shutemov wrote:
>>> Honestly, I'm very skeptical about the idea. It took a lot of time to
>>> stabilize THP for singe page size, equal to PMD page table, but
On Wed, Feb 13, 2019 at 06:20:03PM +0530, Anshuman Khandual wrote:
>
>
> On 02/12/2019 02:03 PM, Kirill A. Shutemov wrote:
> > On Fri, Feb 08, 2019 at 07:43:57AM +0530, Anshuman Khandual wrote:
> >> Hello,
> >>
> >> THP is currently supported for
> >>
> >> - PMD level pages (anon and file)
> >>
On Wed 13-02-19 18:20:03, Anshuman Khandual wrote:
> On 02/12/2019 02:03 PM, Kirill A. Shutemov wrote:
> > Honestly, I'm very skeptical about the idea. It took a lot of time to
> > stabilize THP for singe page size, equal to PMD page table, but this looks
> > like a new can of worms. :P
>
> I
On Wed, Feb 13, 2019 at 05:06:47AM -0800, Matthew Wilcox wrote:
> On Tue, Feb 12, 2019 at 11:33:31AM +0300, Kirill A. Shutemov wrote:
> > To consider it seriously we need to understand what it means for
> > split_huge_p?d()/split_huge_page()? How khugepaged will deal with this?
> >
> > In
On Tue, Feb 12, 2019 at 11:33:31AM +0300, Kirill A. Shutemov wrote:
> To consider it seriously we need to understand what it means for
> split_huge_p?d()/split_huge_page()? How khugepaged will deal with this?
>
> In particular, I'm worry to expose (to user or CPU) page table state in
> the middle
On 02/12/2019 02:03 PM, Kirill A. Shutemov wrote:
> On Fri, Feb 08, 2019 at 07:43:57AM +0530, Anshuman Khandual wrote:
>> Hello,
>>
>> THP is currently supported for
>>
>> - PMD level pages (anon and file)
>> - PUD level pages (file - DAX file system)
>>
>> THP is a single entry mapping at
On Fri, Feb 08, 2019 at 07:43:57AM +0530, Anshuman Khandual wrote:
> Hello,
>
> THP is currently supported for
>
> - PMD level pages (anon and file)
> - PUD level pages (file - DAX file system)
>
> THP is a single entry mapping at standard page table levels (either PMD or
> PUD)
>
> But
On 02/08/2019 09:54 AM, Matthew Wilcox wrote:
> On Fri, Feb 08, 2019 at 07:43:57AM +0530, Anshuman Khandual wrote:
>> How non-standard huge pages can be supported for THP
>>
>> - THP starts recognizing non standard huge page (exported by arch) like
>> HPAGE_CONT_(PMD|PTE)_SIZE
>> -
On Fri, Feb 08, 2019 at 07:43:57AM +0530, Anshuman Khandual wrote:
> How non-standard huge pages can be supported for THP
>
> - THP starts recognizing non standard huge page (exported by arch) like
> HPAGE_CONT_(PMD|PTE)_SIZE
> - THP starts operating for either on HPAGE_PMD_SIZE or
Hello,
THP is currently supported for
- PMD level pages (anon and file)
- PUD level pages (file - DAX file system)
THP is a single entry mapping at standard page table levels (either PMD or PUD)
But architectures like ARM64 supports non-standard page table level huge pages
with contiguous
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