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Subject[PATCH v3 0/4] A few cleanup and fixup patches for migration
Date
Hi everyone,
This series contains a few patches to remove unneeded lock page and
PageMovable check, reduce the rcu lock duration. Also we fix potential
pte_unmap on an not mapped pte. More details can be found in the
respective changelogs. Thanks!

---
v3:
[PATCH 1/4] mm/migration: reduce the rcu lock duration
add the analysis that the original race condition isn't possible now
alsoreduce the rcu lock duration in kernel_migrate_pages
[PATCH 2/4] mm/migration: remove unneeded lock page and PageMovable check
let free_pages_prepare() clear PG_isolated for us
[PATCH 3/4] mm/migration: return errno when isolate_huge_page failed
rename isolate_huge_page to isolate_hugetlb
[PATCH 4/4] mm/migration: fix potential pte_unmap on an not mapped pte
collect Reviewed-by tag
v2:
collect Reviewed-by tag
make isolate_huge_page consistent with isolate_lru_page
add hugetlbfs variant of hugetlb_migration_entry_wait
v1:
rebase [1] on mainline.

[1] https://lore.kernel.org/lkml/20220304093409.25829-2-linmiaohe@huawei.com/T/
---
Miaohe Lin (4):
mm: reduce the rcu lock duration
mm/migration: remove unneeded lock page and PageMovable check
mm/migration: return errno when isolate_huge_page failed
mm/migration: fix potential pte_unmap on an not mapped pte

include/linux/hugetlb.h | 6 +++---
include/linux/swapops.h | 12 ++++++++----
mm/gup.c | 2 +-
mm/hugetlb.c | 15 +++++++--------
mm/memory-failure.c | 2 +-
mm/mempolicy.c | 5 ++---
mm/migrate.c | 40 +++++++++++++++++++++++++---------------
7 files changed, 47 insertions(+), 35 deletions(-)

--
2.23.0

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