After removing READ_ONLY_THP_FOR_FS check in file_thp_enabled(), khugepaged and MADV_COLLAPSE can run on FSes with PMD THP pagecache support even without READ_ONLY_THP_FOR_FS enabled. Remove the Kconfig first so that no one can use READ_ONLY_THP_FOR_FS as upcoming commits remove mapping->nr_thps, which its safe guard mechanism relies on.
Signed-off-by: Zi Yan <[email protected]> Reviewed-by: Lorenzo Stoakes (Oracle) <[email protected]> Acked-by: David Hildenbrand (Arm) <[email protected]> Reviewed-by: Baolin Wang <[email protected]> Reviewed-by: Nico Pache <[email protected]> Reviewed-by: Lance Yang <[email protected]> Cc: Al Viro <[email protected]> Cc: Barry Song <[email protected]> Cc: Chris Mason <[email protected]> Cc: Christian Brauner <[email protected]> Cc: David Sterba <[email protected]> Cc: Dev Jain <[email protected]> Cc: Jan Kara <[email protected]> Cc: Liam Howlett <[email protected]> Cc: Matthew Wilcox (Oracle) <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Nico Pache <[email protected]> Cc: Ryan Roberts <[email protected]> Cc: Shuah Khan <[email protected]> Cc: Song Liu <[email protected]> Cc: Suren Baghdasaryan <[email protected]> Cc: Vlastimil Babka <[email protected]> --- mm/Kconfig | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/mm/Kconfig b/mm/Kconfig index e221fa1dc54d0..27dc5b0139ba6 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -936,17 +936,6 @@ config THP_SWAP For selection by architectures with reasonable THP sizes. -config READ_ONLY_THP_FOR_FS - bool "Read-only THP for filesystems (EXPERIMENTAL)" - depends on TRANSPARENT_HUGEPAGE - - help - Allow khugepaged to put read-only file-backed pages in THP. - - This is marked experimental because it is a new feature. Write - support of file THPs will be developed in the next few release - cycles. - config NO_PAGE_MAPCOUNT bool "No per-page mapcount (EXPERIMENTAL)" help -- 2.53.0
