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THP for ext4, page table manipulation primitives

LSF/MM ATTEND Kirill A. Shutemov 1 participant 1 message Jan 13, 2017

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Hello,

I would like to attend the summit this year.

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One topic I would like to discuss would be huge pages for ext4 and filesystems with backing storage in general. There's patchset that I have hard time upstreaming. I hope having talk about this in person would help moving it forward.

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The other topic: the work on 5-level paging made more obvious that we need better way to deal with page tables. Having different data-types per page table level plus set of helpers to deal with each of them doesn't scale. It worked okay of 2- and 3- level page tables. For 5-, it's getting rather ugly.

And having different types/helpers to deal with different page table levels makes it harder to integrate huge pages into generic code path:
having separate code path for each page size is not very future proof approach.

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 Kirill A. Shutemov

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