linux-kernel - [PATCH v5 0/9] clean-up the migration target allocation functions

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Date:   Mon, 13 Jul 2020 15:41:48 +0900
From:   js1304@...il.com
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        kernel-team@....com, Vlastimil Babka <vbabka@...e.cz>,
        Christoph Hellwig <hch@...radead.org>,
        Roman Gushchin <guro@...com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Michal Hocko <mhocko@...e.com>,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v5 0/9] clean-up the migration target allocation functions

From: Joonsoo Kim <iamjoonsoo.kim@....com>

This patchset clean-up the migration target allocation functions.

* Changes on v5
- remove new_non_cma_page() related patches
(implementation for memalloc_nocma_{save,restore} has a critical bug that
cannot exclude CMA memory in some cases so cannot use them here. Need to
fix them first.)
- introduce a wrapper to handle gfp_mask for hugetlb use it

* Changes on v4
- use full gfp_mask
- use memalloc_nocma_{save,restore} to exclude CMA memory
- separate __GFP_RECLAIM handling for THP allocation
- remove more wrapper functions

* Changes on v3
- As Vlastimil suggested, do not introduce alloc_control for hugetlb functions
- do not change the signature of migrate_pages()
- rename alloc_control to migration_target_control

* Changes on v2
- add acked-by tags
- fix missing compound_head() call for patch #3
- remove thisnode field on alloc_control and use __GFP_THISNODE directly
- fix missing __gfp_mask setup for patch
"mm/hugetlb: do not modify user provided gfp_mask"

* Cover-letter

Contributions of this patchset are:

1. unify two hugetlb alloc functions. As a result, one is remained.
2. remove one implementation for migration target allocaion
3. remove three wrapper for migration target allocation

The patchset is based on next-20200703 + revert following commits.
ddc017c727e429488cccd401a7794c8152e50a5b~1..583c2617fd3244fff79ba3b445964884c5cd7780

The patchset is available on:

https://github.com/JoonsooKim/linux/tree/cleanup-migration-target-allocation-v5.00-next-20200703

Thanks.
Joonsoo Kim (9):
  mm/page_isolation: prefer the node of the source page
  mm/migrate: move migration helper from .h to .c
  mm/hugetlb: unify migration callbacks
  mm/migrate: clear __GFP_RECLAIM to make the migration callback
    consistent with regular THP allocations
  mm/migrate: make a standard migration target allocation function
  mm/mempolicy: use a standard migration target allocation callback
  mm/page_alloc: remove a wrapper for alloc_migration_target()
  mm/memory-failure: remove a wrapper for alloc_migration_target()
  mm/memory_hotplug: remove a wrapper for alloc_migration_target()

 include/linux/hugetlb.h | 41 +++++++++++++++++++++++++++++++--------
 include/linux/migrate.h | 34 ++++++---------------------------
 mm/hugetlb.c            | 35 ++-------------------------------
 mm/internal.h           |  8 +++++++-
 mm/memory-failure.c     | 15 ++++++---------
 mm/memory_hotplug.c     | 42 +++++++++++++++++++++-------------------
 mm/mempolicy.c          | 29 ++++++----------------------
 mm/migrate.c            | 51 +++++++++++++++++++++++++++++++++++++++++++++++--
 mm/page_alloc.c         |  8 ++++++--
 mm/page_isolation.c     |  5 -----
 10 files changed, 137 insertions(+), 131 deletions(-)

-- 
2.7.4