On Mon, May 01, 2023 at 10:50:23AM -0700, Suren Baghdasaryan wrote:
> +++ b/mm/memory.c
> @@ -3711,11 +3711,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
> if (!pte_unmap_same(vmf))
> goto out;
>
> - if (vmf->flags & FAULT_FLAG_VMA_LOCK) {
> - ret = VM_FAULT_RETRY;
> - goto out;
> - }
> -
> entry = pte_to_swp_entry(vmf->orig_pte);
> if (unlikely(non_swap_entry(entry))) {
> if (is_migration_entry(entry)) {
You're missing the necessary fallback in the (!folio) case.
swap_readpage() is synchronous and will sleep.
