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We can't use the VMA iterator here because it doesn't support moving to an earlier position. Link: https://lkml.kernel.org/r/20220504011345.662299-33-Liam.Howlett@oracl= e.com Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Liam R. Howlett Acked-by: Vlastimil Babka Cc: Catalin Marinas Cc: David Howells Cc: SeongJae Park Cc: Will Deacon Cc: Davidlohr Bueso Signed-off-by: Andrew Morton --- kernel/sched/fair.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 77b2048a9326..e8202b5cd3d5 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2734,6 +2734,7 @@ static void task_numa_work(struct callback_head *work= ) struct task_struct *p =3D current; struct mm_struct *mm =3D p->mm; u64 runtime =3D p->se.sum_exec_runtime; + MA_STATE(mas, &mm->mm_mt, 0, 0); struct vm_area_struct *vma; unsigned long start, end; unsigned long nr_pte_updates =3D 0; @@ -2790,13 +2791,16 @@ static void task_numa_work(struct callback_head *wo= rk) =20 if (!mmap_read_trylock(mm)) return; - vma =3D find_vma(mm, start); + mas_set(&mas, start); + vma =3D mas_find(&mas, ULONG_MAX); if (!vma) { reset_ptenuma_scan(p); start =3D 0; - vma =3D mm->mmap; + mas_set(&mas, start); + vma =3D mas_find(&mas, ULONG_MAX); } - for (; vma; vma =3D vma->vm_next) { + + for (; vma; vma =3D mas_find(&mas, ULONG_MAX)) { if (!vma_migratable(vma) || !vma_policy_mof(vma) || is_vm_hugetlb_page(vma) || (vma->vm_flags & VM_MIXEDMAP)) { continue; --=20 2.35.1