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Docs/mm: fix outdated "radix tree" in page_migration

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Steps 7 and 9 of the migration description still say "radix tree", unlike
steps 5 and 11 which already use "i_pages lock".  The page cache moved to
the XArray at mapping->i_pages long ago.  Use "page cache tree" for the
two remaining references.

Link: https://lore.kernel.org/20260812075739.325441-1-husong@kylinos.cn
Signed-off-by: Song Hu <husong@kylinos.cn>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Song Hu 2026-08-12 15:57:39 +08:00 committed by Andrew Morton
parent 2a0be246e3
commit 73b5d07990
1 changed files with 3 additions and 3 deletions
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6
Documentation/mm/page_migration.rst
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@ -110,13 +110,13 @@ Steps:
6. The refcount of the page is examined and we back out if references remain.
Otherwise, we know that we are the only one referencing this page.
7. The radix tree is checked and if it does not contain the pointer to this
page then we back out because someone else modified the radix tree.
7. The page cache tree is checked and if it does not contain the pointer to this
page then we back out because someone else modified the page cache tree.
8. The new page is prepped with some settings from the old page so that
accesses to the new page will discover a page with the correct settings.
9. The radix tree is changed to point to the new page.
9. The page cache tree is changed to point to the new page.
10. The reference count of the old page is dropped because the address space
reference is gone. A reference to the new page is established because