On 4/29/26 9:35 AM, 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
Yay its gone! Thanks for working on this :)
Reviewed-by: Nico Pache <[email protected]>
- 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
