On Fri 06-12-19 09:34:50, Yang Shi wrote:
> Since commit e78bbfa82624 ("mm: stop returning -ENOENT
> from sys_move_pages() if nothing got migrated"), move_pages doesn't
> return -ENOENT anymore if the pages are already on the target nodes, but
> this change is never reflected in manpage.
>
> Cc: Michael Kerrisk <mtk.manpages@xxxxxxxxx>
> Cc: Christoph Lameter <cl@xxxxxxxxx>
> Cc: John Hubbard <jhubbard@xxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxx>
> Cc: Qian Cai <cai@xxxxxx>
> Signed-off-by: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
> ---
> man2/move_pages.2 | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/man2/move_pages.2 b/man2/move_pages.2
> index 2d96468..2a2f3cd 100644
> --- a/man2/move_pages.2
> +++ b/man2/move_pages.2
> @@ -192,9 +192,8 @@ was specified or an attempt was made to migrate pages of a kernel thread.
> One of the target nodes is not online.
> .TP
> .B ENOENT
> -No pages were found that require moving.
> -All pages are either already
> -on the target node, not present, had an invalid address or could not be
> +No pages were found.
> +All pages are either not present, had an invalid address or could not be
> moved because they were mapped by multiple processes.
I would rather not put any specifics here because those reasons might
differ in future. I would simply go with "No pages were found that
require or could be moved."
--
Michal Hocko
SUSE Labs
