From 73b5d07990a0e6ea9cdf2c07fa8fbc865d398c1d Mon Sep 17 00:00:00 2001 From: Song Hu Date: Wed, 12 Aug 2026 15:57:39 +0800 Subject: [PATCH] Docs/mm: fix outdated "radix tree" in page_migration Steps 7 and 9 of the migration description still say "radix tree", unlike steps 5 and 11 which already use "i_pages lock".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 Cc: David Hildenbrand Cc: Jonathan Corbet Cc: Liam R. Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mike Rapoport Cc: Randy Dunlap Cc: Suren Baghdasaryan Cc: Vlastimil Babka Cc: Matthew Wilcox Cc: Jan Kara Signed-off-by: Andrew Morton --- Documentation/mm/page_migration.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/Documentation/mm/page_migration.rst b/Documentation/mm/page_migration.rst index 34602b254aa6..5b8d50308db1 100644 --- a/Documentation/mm/page_migration.rst +++ b/Documentation/mm/page_migration.rst @@ -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