Remove READ_ONLY_THP_FOR_FS and khugepaged for file-backed pmd-sized hugepages are enabled by the global transparent hugepage control. khugepaged can still be enabled by per-size control for anon and shmem when the global control is off.
Add shmem_hpage_pmd_enabled() stub for !CONFIG_SHMEM to remove IS_ENABLED(SHMEM) in hugepage_enabled(). Clean up hugepage_enabled() by moving anon code to anon_hpage_enabled(). Signed-off-by: Zi Yan <[email protected]> Reviewed-by: Baolin Wang <[email protected]> --- include/linux/shmem_fs.h | 2 +- mm/khugepaged.c | 26 ++++++++++++++++---------- 2 files changed, 17 insertions(+), 11 deletions(-) diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h index 93a0ba872ebe..acb8dd961b45 100644 --- a/include/linux/shmem_fs.h +++ b/include/linux/shmem_fs.h @@ -127,7 +127,7 @@ int shmem_writeout(struct folio *folio, struct swap_iocb **plug, void shmem_truncate_range(struct inode *inode, loff_t start, uoff_t end); int shmem_unuse(unsigned int type); -#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && defined(CONFIG_SHMEM) unsigned long shmem_allowable_huge_orders(struct inode *inode, struct vm_area_struct *vma, pgoff_t index, loff_t write_end, bool shmem_huge_force); diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 726f8ace01af..cdd4b37e4a68 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -524,26 +524,32 @@ static inline int collapse_test_exit_or_disable(struct mm_struct *mm) mm_flags_test(MMF_DISABLE_THP_COMPLETELY, mm); } +static inline bool anon_hpage_enabled(void) +{ + if (READ_ONCE(huge_anon_orders_always)) + return true; + if (READ_ONCE(huge_anon_orders_madvise)) + return true; + if (READ_ONCE(huge_anon_orders_inherit) && + hugepage_global_enabled()) + return true; + return false; +} + static bool hugepage_enabled(void) { /* * We cover the anon, shmem and the file-backed case here; file-backed - * hugepages, when configured in, are determined by the global control. + * hugepages are determined by the global control. * Anon hugepages are determined by its per-size mTHP control. * Shmem pmd-sized hugepages are also determined by its pmd-size control, * except when the global shmem_huge is set to SHMEM_HUGE_DENY. */ - if (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS) && - hugepage_global_enabled()) - return true; - if (READ_ONCE(huge_anon_orders_always)) + if (hugepage_global_enabled()) return true; - if (READ_ONCE(huge_anon_orders_madvise)) - return true; - if (READ_ONCE(huge_anon_orders_inherit) && - hugepage_global_enabled()) + if (anon_hpage_enabled()) return true; - if (IS_ENABLED(CONFIG_SHMEM) && shmem_hpage_pmd_enabled()) + if (shmem_hpage_pmd_enabled()) return true; return false; } -- 2.43.0
