On Wed, Jan 13, 2021 at 01:22:04PM +0800, Muchun Song wrote:
> diff --git a/mm/migrate.c b/mm/migrate.c
> index 4385f2fb5d18..a6631c4eb6a6 100644
> --- a/mm/migrate.c
> +++ b/mm/migrate.c
> @@ -1279,6 +1279,12 @@ static int unmap_and_move_huge_page(new_page_t
> get_new_page,
> return -ENOSYS;
> }
>
> + if (page_count(hpage) == 1) {
> + /* page was freed from under us. So we are done. */
> + putback_active_hugepage(hpage);
> + return MIGRATEPAGE_SUCCESS;
> + }
> +
I was a bit puzzled as why we did not go to the "goto" block that already does
this, but then I saw the put_new_page/new_hpage handlind further down.
It could be re-arranged but out of scope, so:
Reviewed-by: Oscar Salvador <[email protected]>
--
Oscar Salvador
SUSE L3
