The patch titled
Subject: mm: remove VM_EXEC requirement for THP eligibility
has been added to the -mm mm-unstable branch. Its filename is
mm-remove-vm_exec-requirement-for-thp-eligibility.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-vm_exec-requirement-for-thp-eligibility.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Fangrui Song <maskray@xxxxxxxxxx>
Subject: mm: remove VM_EXEC requirement for THP eligibility
Date: Tue, 19 Dec 2023 21:41:23 -0800
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@xxxxxxxxxx
Signed-off-by: Fangrui Song <maskray@xxxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Song Liu <songliubraving@xxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/huge_mm.h | 1 -
1 file changed, 1 deletion(-)
--- a/include/linux/huge_mm.h~mm-remove-vm_exec-requirement-for-thp-eligibility
+++ a/include/linux/huge_mm.h
@@ -206,7 +206,6 @@ static inline bool file_thp_enabled(stru
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);
}
_
Patches currently in -mm which might be from maskray@xxxxxxxxxx are
mm-remove-vm_exec-requirement-for-thp-eligibility.patch
