From: Fangrui Song Date: Wed, 20 Dec 2023 05:41:23 +0000 (-0800) Subject: mm: remove VM_EXEC requirement for THP eligibility X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7fbb5e188248c50f737720825da1864ce42536d1;p=linux.git mm: remove VM_EXEC requirement for THP eligibility Commit e6be37b2e7bd ("mm/huge_memory.c: add missing read-only THP checking in transparent_hugepage_enabled()") introduced the VM_EXEC requirement, which is not strictly needed. lld's default --rosegment option and GNU ld's -z separate-code option (default on Linux/x86 since binutils 2.31) create a read-only PT_LOAD segment without the PF_X flag, which should be eligible for THP. Certain architectures support medium and large code models, where .lrodata may be placed in a separate read-only PT_LOAD segment, which should be eligible for THP as well. Link: https://lkml.kernel.org/r/20231220054123.1266001-1-maskray@google.com Signed-off-by: Fangrui Song Acked-by: Yang Shi Cc: Miaohe Lin Cc: Song Liu Cc: Matthew Wilcox Signed-off-by: Andrew Morton --- diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index fa7a38a30fc68..5adb86af35fc4 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -206,7 +206,6 @@ static inline bool file_thp_enabled(struct vm_area_struct *vma) inode = vma->vm_file->f_inode; return (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS)) && - (vma->vm_flags & VM_EXEC) && !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode); }