Sorry, I should have added some more Cc's here.
* Liam R. Howlett <[email protected]> [230606 14:35]:
> The validate_mm() function was deemed too heavy to enable with
> CONFIG_DEBUG_VM [1]. Revert the config option to
> CONFIG_DEBUG_VM_MAPLE_TREE
>
> Signed-off-by: Liam R. Howlett <[email protected]>
> ---
>
> Andrew,
>
> Please squash this into your mm-unstable commit e9c9b8e9753d ("mm:
> update validate_mm() to use vma iterator")
>
> mm/mmap.c | 9 +++------
> 1 file changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/mm/mmap.c b/mm/mmap.c
> index 71733953ff83..7c106a164c0f 100644
> --- a/mm/mmap.c
> +++ b/mm/mmap.c
> @@ -299,7 +299,7 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
> return origbrk;
> }
>
> -#if defined(CONFIG_DEBUG_VM)
> +#if defined(CONFIG_DEBUG_VM_MAPLE_TREE)
> static void validate_mm(struct mm_struct *mm)
> {
> int bug = 0;
> @@ -307,10 +307,7 @@ static void validate_mm(struct mm_struct *mm)
> struct vm_area_struct *vma;
> VMA_ITERATOR(vmi, mm, 0);
>
> -#if defined(CONFIG_DEBUG_VM_MAPLE_TREE)
> mt_validate(&mm->mm_mt);
> -#endif
> -
> for_each_vma(vmi, vma) {
> #ifdef CONFIG_DEBUG_VM_RB
> struct anon_vma *anon_vma = vma->anon_vma;
> @@ -353,9 +350,9 @@ static void validate_mm(struct mm_struct *mm)
> VM_BUG_ON_MM(bug, mm);
> }
>
> -#else /* !CONFIG_DEBUG_VM */
> +#else /* !CONFIG_DEBUG_VM_MAPLE_TREE */
> #define validate_mm(mm) do { } while (0)
> -#endif /* CONFIG_DEBUG_VM */
> +#endif /* CONFIG_DEBUG_VM_MAPLE_TREE */
>
> /*
> * vma has some anon_vma assigned, and is already inserted on that
> --
> 2.39.2
>