From: Fangrui Song maskray@google.com
mainline inclusion from mainline-v6.8-rc1 commit 7fbb5e188248c50f737720825da1864ce42536d1 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I9H84X CVE: NA
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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 maskray@google.com Acked-by: Yang Shi shy828301@gmail.com Cc: Miaohe Lin linmiaohe@huawei.com Cc: Song Liu songliubraving@fb.com Cc: Matthew Wilcox willy@infradead.org Signed-off-by: Andrew Morton akpm@linux-foundation.org (cherry picked from commit 7fbb5e188248c50f737720825da1864ce42536d1) Signed-off-by: Kefeng Wang wangkefeng.wang@huawei.com --- include/linux/huge_mm.h | 1 - 1 file changed, 1 deletion(-)
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index fa7a38a30fc6..5adb86af35fc 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); }