diff options
| -rw-r--r-- | include/linux/huge_mm.h | 1 | ||||
| -rw-r--r-- | include/linux/khugepaged.h | 3 | ||||
| -rw-r--r-- | include/linux/sched/coredump.h | 5 | ||||
| -rw-r--r-- | kernel/sys.c | 6 | ||||
| -rw-r--r-- | mm/khugepaged.c | 3 | ||||
| -rw-r--r-- | mm/shmem.c | 8 |
6 files changed, 17 insertions, 9 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index d3b3e8f..40d7b7d 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -92,6 +92,7 @@ extern bool is_vma_temporary_stack(struct vm_area_struct *vma); (1<<TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG) && \ ((__vma)->vm_flags & VM_HUGEPAGE))) && \ !((__vma)->vm_flags & VM_NOHUGEPAGE) && \ + !test_bit(MMF_DISABLE_THP, &(__vma)->vm_mm->flags) && \ !is_vma_temporary_stack(__vma)) #define transparent_hugepage_use_zero_page() \ (transparent_hugepage_flags & \ diff --git a/include/linux/khugepaged.h b/include/linux/khugepaged.h index 5d9a400..f0d7335 100644 --- a/include/linux/khugepaged.h +++ b/include/linux/khugepaged.h @@ -48,7 +48,8 @@ static inline int khugepaged_enter(struct vm_area_struct *vma, if (!test_bit(MMF_VM_HUGEPAGE, &vma->vm_mm->flags)) if ((khugepaged_always() || (khugepaged_req_madv() && (vm_flags & VM_HUGEPAGE))) && - !(vm_flags & VM_NOHUGEPAGE)) + !(vm_flags & VM_NOHUGEPAGE) && + !test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) if (__khugepaged_enter(vma->vm_mm)) return -ENOMEM; return 0; diff --git a/include/linux/sched/coredump.h b/include/linux/sched/coredump.h index 69eedce..98ae0d0 100644 --- a/include/linux/sched/coredump.h +++ b/include/linux/sched/coredump.h @@ -68,7 +68,10 @@ static inline int get_dumpable(struct mm_struct *mm) #define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */ #define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */ #define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */ +#define MMF_DISABLE_THP 24 /* disable THP for all VMAs */ +#define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP) -#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK) +#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\ + MMF_DISABLE_THP_MASK) #endif /* _LINUX_SCHED_COREDUMP_H */ diff --git a/kernel/sys.c b/kernel/sys.c index 47d9015..73fc0af 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -2360,7 +2360,7 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, case PR_GET_THP_DISABLE: if (arg2 || arg3 || arg4 || arg5) return -EINVAL; - error = !!(me->mm->def_flags & VM_NOHUGEPAGE); + error = !!test_bit(MMF_DISABLE_THP, &me->mm->flags); break; case PR_SET_THP_DISABLE: if (arg3 || arg4 || arg5) @@ -2368,9 +2368,9 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, if (down_write_killable(&me->mm->mmap_sem)) return -EINTR; if (arg2) - me->mm->def_flags |= VM_NOHUGEPAGE; + set_bit(MMF_DISABLE_THP, &me->mm->flags); else - me->mm->def_flags &= ~VM_NOHUGEPAGE; + clear_bit(MMF_DISABLE_THP, &me->mm->flags); up_write(&me->mm->mmap_sem); break; case PR_MPX_ENABLE_MANAGEMENT: diff --git a/mm/khugepaged.c b/mm/khugepaged.c index df4ebdb..c01f177 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -816,7 +816,8 @@ khugepaged_alloc_page(struct page **hpage, gfp_t gfp, int node) static bool hugepage_vma_check(struct vm_area_struct *vma) { if ((!(vma->vm_flags & VM_HUGEPAGE) && !khugepaged_always()) || - (vma->vm_flags & VM_NOHUGEPAGE)) + (vma->vm_flags & VM_NOHUGEPAGE) || + test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) return false; if (shmem_file(vma->vm_file)) { if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGE_PAGECACHE)) @@ -1977,10 +1977,12 @@ static int shmem_fault(struct vm_fault *vmf) } sgp = SGP_CACHE; - if (vma->vm_flags & VM_HUGEPAGE) - sgp = SGP_HUGE; - else if (vma->vm_flags & VM_NOHUGEPAGE) + + if ((vma->vm_flags & VM_NOHUGEPAGE) || + test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) sgp = SGP_NOHUGE; + else if (vma->vm_flags & VM_HUGEPAGE) + sgp = SGP_HUGE; error = shmem_getpage_gfp(inode, vmf->pgoff, &vmf->page, sgp, gfp, vma, vmf, &ret); |
