On Wed, Apr 29, 2026 at 11:35:28AM -0400, Zi Yan wrote: >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]> >--- > 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. >-
Hi, I see hugepage_enabled() in khugepaged.c still use READ_ONLY_THP_FOR_FS. > config NO_PAGE_MAPCOUNT > bool "No per-page mapcount (EXPERIMENTAL)" > help >-- >2.53.0 > -- Wei Yang Help you, Help me
