Re: [PATCH v3 02/14] mm/page_alloc: split prep_compound_page into head and... | linux-mm

[PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Joao Martins <hidden> · 2021-07-14
[PATCH v3 03/14] mm/page_alloc: refactor memmap_init_zone_device() page init · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 03/14] mm/page_alloc: refactor memmap_init_zone_device() page init · Dan Williams <hidden> · 2021-07-15
[PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Dan Williams <hidden> · 2021-07-15
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Joao Martins <hidden> · 2021-07-15
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Joao Martins <hidden> · 2021-07-15
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Dan Williams <hidden> · 2021-07-15
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Joao Martins <hidden> · 2021-07-30
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Jane Chu <hidden> · 2021-07-22
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Joao Martins <hidden> · 2021-07-22
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Christoph Hellwig <hch@infradead.org> · 2021-07-15
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Joao Martins <hidden> · 2021-07-15
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Christoph Hellwig <hch@infradead.org> · 2021-07-15
Re: [PATCH v3 04/14] mm/memremap: add ZONE_DEVICE support for compound pages · Joao Martins <hidden> · 2021-07-15
[PATCH v3 01/14] memory-failure: fetch compound_head after pgmap_pfn_valid() · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 01/14] memory-failure: fetch compound_head after pgmap_pfn_valid() · Dan Williams <hidden> · 2021-07-15
Re: [External] [PATCH v3 01/14] memory-failure: fetch compound_head after pgmap_pfn_valid() · Muchun Song <hidden> · 2021-07-15
Re: [External] [PATCH v3 01/14] memory-failure: fetch compound_head after pgmap_pfn_valid() · Christoph Hellwig <hch@infradead.org> · 2021-07-15
Re: [PATCH v3 01/14] memory-failure: fetch compound_head after pgmap_pfn_valid() · Muchun Song <hidden> · 2021-07-15
Re: [PATCH v3 01/14] memory-failure: fetch compound_head after pgmap_pfn_valid() · Joao Martins <hidden> · 2021-07-15
[PATCH v3 05/14] mm/sparse-vmemmap: add a pgmap argument to section activation · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 05/14] mm/sparse-vmemmap: add a pgmap argument to section activation · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 05/14] mm/sparse-vmemmap: add a pgmap argument to section activation · Joao Martins <hidden> · 2021-07-28
[PATCH v3 06/14] mm/sparse-vmemmap: refactor core of vmemmap_populate_basepages() to helper · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 06/14] mm/sparse-vmemmap: refactor core of vmemmap_populate_basepages() to helper · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 06/14] mm/sparse-vmemmap: refactor core of vmemmap_populate_basepages() to helper · Joao Martins <hidden> · 2021-07-28
[PATCH v3 02/14] mm/page_alloc: split prep_compound_page into head and tail subparts · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 02/14] mm/page_alloc: split prep_compound_page into head and tail subparts · Dan Williams <hidden> · 2021-07-15
Re: [External] [PATCH v3 02/14] mm/page_alloc: split prep_compound_page into head and tail subparts · Muchun Song <hidden> · 2021-07-15
Re: [PATCH v3 02/14] mm/page_alloc: split prep_compound_page into head and tail subparts · Joao Martins <hidden> · 2021-07-15
[PATCH v3 07/14] mm/hugetlb_vmemmap: move comment block to Documentation/vm · Joao Martins <hidden> · 2021-07-14
Re: [External] [PATCH v3 07/14] mm/hugetlb_vmemmap: move comment block to Documentation/vm · Muchun Song <hidden> · 2021-07-15
Re: [External] [PATCH v3 07/14] mm/hugetlb_vmemmap: move comment block to Documentation/vm · Joao Martins <hidden> · 2021-07-15
Re: [PATCH v3 07/14] mm/hugetlb_vmemmap: move comment block to Documentation/vm · Dan Williams <hidden> · 2021-07-28
[PATCH v3 08/14] mm/sparse-vmemmap: populate compound pagemaps · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 08/14] mm/sparse-vmemmap: populate compound pagemaps · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 08/14] mm/sparse-vmemmap: populate compound pagemaps · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 08/14] mm/sparse-vmemmap: populate compound pagemaps · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 08/14] mm/sparse-vmemmap: populate compound pagemaps · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 08/14] mm/sparse-vmemmap: populate compound pagemaps · Joao Martins <hidden> · 2021-07-28
[PATCH v3 09/14] mm/page_alloc: reuse tail struct pages for compound pagemaps · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 09/14] mm/page_alloc: reuse tail struct pages for compound pagemaps · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 09/14] mm/page_alloc: reuse tail struct pages for compound pagemaps · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 09/14] mm/page_alloc: reuse tail struct pages for compound pagemaps · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 09/14] mm/page_alloc: reuse tail struct pages for compound pagemaps · Joao Martins <hidden> · 2021-07-28
[PATCH v3 10/14] device-dax: use ALIGN() for determining pgoff · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 10/14] device-dax: use ALIGN() for determining pgoff · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 10/14] device-dax: use ALIGN() for determining pgoff · Joao Martins <hidden> · 2021-07-28
[PATCH v3 11/14] device-dax: ensure dev_dax->pgmap is valid for dynamic devices · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 11/14] device-dax: ensure dev_dax->pgmap is valid for dynamic devices · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 11/14] device-dax: ensure dev_dax->pgmap is valid for dynamic devices · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 11/14] device-dax: ensure dev_dax->pgmap is valid for dynamic devices · Joao Martins <hidden> · 2021-08-06
[PATCH v3 12/14] device-dax: compound pagemap support · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 12/14] device-dax: compound pagemap support · Dan Williams <hidden> · 2021-07-14
Re: [PATCH v3 12/14] device-dax: compound pagemap support · Joao Martins <hidden> · 2021-07-15
Re: [PATCH v3 12/14] device-dax: compound pagemap support · Dan Williams <hidden> · 2021-07-27
Re: [PATCH v3 12/14] device-dax: compound pagemap support · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 12/14] device-dax: compound pagemap support · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 12/14] device-dax: compound pagemap support · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 12/14] device-dax: compound pagemap support · Dan Williams <hidden> · 2021-07-28
[PATCH v3 13/14] mm/gup: grab head page refcount once for group of subpages · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 13/14] mm/gup: grab head page refcount once for group of subpages · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 13/14] mm/gup: grab head page refcount once for group of subpages · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 13/14] mm/gup: grab head page refcount once for group of subpages · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 13/14] mm/gup: grab head page refcount once for group of subpages · Joao Martins <hidden> · 2021-08-25
Re: [PATCH v3 13/14] mm/gup: grab head page refcount once for group of subpages · Matthew Wilcox <willy@infradead.org> · 2021-08-25
Re: [PATCH v3 13/14] mm/gup: grab head page refcount once for group of subpages · Joao Martins <hidden> · 2021-08-25
[PATCH v3 14/14] mm/sparse-vmemmap: improve memory savings for compound pud geometry · Joao Martins <hidden> · 2021-07-14
Re: [PATCH v3 14/14] mm/sparse-vmemmap: improve memory savings for compound pud geometry · Dan Williams <hidden> · 2021-07-28
Re: [PATCH v3 14/14] mm/sparse-vmemmap: improve memory savings for compound pud geometry · Joao Martins <hidden> · 2021-07-28
Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Andrew Morton <akpm@linux-foundation.org> · 2021-07-14
Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Dan Williams <hidden> · 2021-07-14
Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Matthew Wilcox <willy@infradead.org> · 2021-07-22
Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Joao Martins <hidden> · 2021-07-22
Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Dan Williams <hidden> · 2021-07-27
Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Joao Martins <hidden> · 2021-08-02
Re: [PATCH v3 00/14] mm, sparse-vmemmap: Introduce compound pagemaps · Dan Williams <hidden> · 2021-08-02

Re: [PATCH v3 02/14] mm/page_alloc: split prep_compound_page into head and tail subparts

From: Dan Williams <hidden>
Date: 2021-07-15 00:19:30
Also in: linux-doc, nvdimm

On Wed, Jul 14, 2021 at 12:36 PM Joao Martins [off-list ref] wrote:

Split the utility function prep_compound_page() into head and tail
counterparts, and use them accordingly.

This is in preparation for sharing the storage for / deduplicating
compound page metadata.

Signed-off-by: Joao Martins <redacted>
Acked-by: Mike Kravetz <redacted>

Looks good,

Reviewed-by: Dan Williams <redacted>

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