The quilt patch titled
Subject: mm/migration: remove unneeded lock page and PageMovable check
has been removed from the -mm tree. Its filename was
mm-migration-remove-unneeded-lock-page-and-pagemovable-check.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/migration: remove unneeded lock page and PageMovable check
Date: Mon, 30 May 2022 19:30:14 +0800
When non-lru movable page was freed from under us, __ClearPageMovable must
have been done. So we can remove unneeded lock page and PageMovable check
here. Also free_pages_prepare() will clear PG_isolated for us, so we can
further remove ClearPageIsolated as suggested by David.
Link: https://lkml.kernel.org/r/20220530113016.16663-3-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Huang Ying <ying.huang@xxxxxxxxx>
Cc: kernel test robot <lkp@xxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
--- a/mm/migrate.c~mm-migration-remove-unneeded-lock-page-and-pagemovable-check
+++ a/mm/migrate.c
@@ -1090,15 +1090,10 @@ static int unmap_and_move(new_page_t get
return -ENOSYS;
if (page_count(page) == 1) {
- /* page was freed from under us. So we are done. */
+ /* Page was freed from under us. So we are done. */
ClearPageActive(page);
ClearPageUnevictable(page);
- if (unlikely(__PageMovable(page))) {
- lock_page(page);
- if (!PageMovable(page))
- ClearPageIsolated(page);
- unlock_page(page);
- }
+ /* free_pages_prepare() will clear PG_isolated. */
goto out;
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-migration-return-errno-when-isolate_huge_page-failed.patch
mm-migration-fix-potential-pte_unmap-on-an-not-mapped-pte.patch
mm-swapfile-fix-possible-data-races-of-inuse_pages.patch
mm-swap-remove-swap_cache_info-statistics.patch
mm-madvise-minor-cleanup-for-swapin_walk_pmd_entry.patch
mm-khugepaged-remove-unneeded-shmem_huge_enabled-check.patch
mm-khugepaged-stop-swapping-in-page-when-vm_fault_retry-occurs.patch
mm-khugepaged-trivial-typo-and-codestyle-cleanup.patch
mm-khugepaged-minor-cleanup-for-collapse_file.patch
mm-khugepaged-use-helper-macro-__attr_rw.patch
mm-khugepaged-remove-unneeded-return-value-of-khugepaged_add_pte_mapped_thp.patch
mm-khugepaged-try-to-free-transhuge-swapcache-when-possible.patch
mm-page_alloc-minor-clean-up-for-memmap_init_compound.patch
mm-mmapc-fix-missing-call-to-vm_unacct_memory-in-mmap_region.patch
filemap-minor-cleanup-for-filemap_write_and_wait_range.patch
