On Wed, 2 Feb 2022 at 02:43, Liam Howlett <liam.howlett@xxxxxxxxxx> wrote:
>
> From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
>
> Replace any vm_next use with vma_find().
>
> Update free_pgtables(), unmap_vmas(), and zap_page_range() to use the
> maple tree.
>
> Use the new free_pgtables() and unmap_vmas() in do_mas_align_munmap().
> At the same time, alter the loop to be more compact.
>
> Now that free_pgtables() and unmap_vmas() take a maple tree as an
> argument, rearrange do_mas_align_munmap() to use the new tree to hold
> the vmas to remove.
>
> Remove __vma_link_list() and __vma_unlink_list() as they are exclusively
> used to update the linked list
>
> Drop linked list update from __insert_vm_struct().
>
> Rework validation of tree as it was depending on the linked list.
>
> Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
> ---
> include/linux/mm.h | 5 +-
> include/linux/mm_types.h | 4 -
> kernel/fork.c | 13 +-
> mm/debug.c | 14 +-
> mm/gup.c | 2 +-
> mm/internal.h | 10 +-
> mm/memory.c | 33 ++-
> mm/mmap.c | 518 +++++++++++++++++----------------------
> mm/nommu.c | 2 -
> mm/util.c | 40 ---
> 10 files changed, 264 insertions(+), 377 deletions(-)
...
> -static inline int
> -unlock_range(struct vm_area_struct *start, struct vm_area_struct **tail,
> - unsigned long limit)
> -{
> - struct mm_struct *mm = start->vm_mm;
> - struct vm_area_struct *tmp = start;
> - int count = 0;
> -
> - while (tmp && tmp->vm_start < limit) {
> - *tail = tmp;
> - count++;
> - if (tmp->vm_flags & VM_LOCKED) {
> - mm->locked_vm -= vma_pages(tmp);
> - munlock_vma_pages_all(tmp);
> - }
> -
> - tmp = tmp->vm_next;
> - }
> -
> - return count;
> -}
Trivial: Comment in exit_mmap(), for oom-victim case, has a reference
to this removed function (unlock_range()).
Cheers,
Mark
