linux-kernel - [PATCH mm-unstable v3 0/8] continue hugetlb folio conversion

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Date:   Fri, 13 Jan 2023 16:30:49 -0600
From:   Sidhartha Kumar <sidhartha.kumar@...cle.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     akpm@...ux-foundation.org, songmuchun@...edance.com,
        mike.kravetz@...cle.com, willy@...radead.org, jhubbard@...dia.com,
        Sidhartha Kumar <sidhartha.kumar@...cle.com>
Subject: [PATCH mm-unstable v3 0/8] continue hugetlb folio conversion

============== OVERVIEW ===========================
This series continues the conversion of core hugetlb functions to use
folios. This series converts many helper funtions in the hugetlb fault
path. This is in preperation for another series to convert the hugetlb
fault code paths to operate on folios.

============== TESTING ===========================
LTP:
	Ran 10 back to back rounds of the LTP hugetlb test suite.

Gigantic Huge Pages:
	Test allocation and freeing via hugeadm commands:
		hugeadm --pool-pages-min 1GB:10
		hugeadm --pool-pages-min 1GB:0

Demote:
	Demote 1 1GB hugepages to 512 2MB hugepages
		echo 1 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages
		echo 1 > /sys/kernel/mm/hugepages/hugepages-1048576kB/demote
		cat /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
			# 512
		cat /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages
			# 0

Rebased on 1/13/2023 mm-unstable

v2 -> v3:
- grab folio directly from hugepage_freelists in patch 8 per
  Matthew

v1 -> v2:
- remove reduntant get_folio_unless_zero() and use existing
  folio_try_get() in patch 1 per Matthew
- grab folio directly from hugepage_freelists in patch 3 per
  Matthew
- add r-b to patches 1-2, 4-7
- change variabale 'subfolio' to inner_folio in patch 8 per
  John Hubbard


Sidhartha Kumar (8):
  mm/hugetlb: convert isolate_hugetlb to folios
  mm/hugetlb: convert __update_and_free_page() to folios
  mm/hugetlb: convert dequeue_hugetlb_page functions to folios
  mm/hugetlb: convert alloc_surplus_huge_page() to folios
  mm/hugetlb: increase use of folios in alloc_huge_page()
  mm/hugetlb: convert alloc_migrate_huge_page to folios
  mm/hugetlb: convert restore_reserve_on_error() to folios
  mm/hugetlb: convert demote_free_huge_page to folios

 include/linux/hugetlb.h        |  10 +-
 include/linux/hugetlb_cgroup.h |   8 +-
 mm/gup.c                       |   2 +-
 mm/hugetlb.c                   | 218 +++++++++++++++++----------------
 mm/hugetlb_cgroup.c            |   8 +-
 mm/memory-failure.c            |   2 +-
 mm/memory_hotplug.c            |   2 +-
 mm/mempolicy.c                 |   2 +-
 mm/migrate.c                   |   7 +-
 9 files changed, 131 insertions(+), 128 deletions(-)

-- 
2.39.0