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.
Reviewed-by: Lorenzo Stoakes (Oracle) <[email protected]> Signed-off-by: Zi Yan <[email protected]> --- mm/Kconfig | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/mm/Kconfig b/mm/Kconfig index bd283958d675..408fc7b82233 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -937,17 +937,6 @@ 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 -- 2.43.0
