Hi Baolin,
On Thu, 16 Feb 2023 18:53:34 +0800 Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> wrote:
>
>
> On 2/16/2023 7:02 AM, SeongJae Park wrote:
> > Return value mechanism of do_migrate_range() is not very simple, while
> > no caller of the function checks the return value. Make the function
> > return nothing to be more simple.
> >
> > Suggested-by: David Hildenbrand <david@xxxxxxxxxx>
> > Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
> > ---
> > mm/memory_hotplug.c | 5 +----
> > 1 file changed, 1 insertion(+), 4 deletions(-)
> >
> > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> > index bcb0dc41c2f2..6c615ba1a5c7 100644
> > --- a/mm/memory_hotplug.c
> > +++ b/mm/memory_hotplug.c
> > @@ -1620,8 +1620,7 @@ static int scan_movable_pages(unsigned long start, unsigned long end,
> > return 0;
> > }
> >
> > -static int
> > -do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
> > +static void do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
> > {
> > unsigned long pfn;
> > struct page *page, *head;
> > @@ -1721,8 +1720,6 @@ do_migrate_range(unsigned long start_pfn, unsigned long end_pfn)
> > putback_movable_pages(&source);
> > }
> > }
> > -
> > - return ret;
>
> Nit: while we are at it, can we also remove the "TODO" comment in
> offline_pages()?
>
> ret = scan_movable_pages(pfn, end_pfn, &pfn);
> if (!ret) {
> /*
> * TODO: fatal migration failures should bail
> * out
> */
> do_migrate_range(pfn, end_pfn);
> }
>
> With David's comments:
> Reviewed-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx>
As David mentioned we're just still unclear what issues are fatal[1], I was
thinking we didn't forgive the future work, so left the comment. If anyone has
different opinion or I'm getting something wrong, please let me know.
[1] https://lore.kernel.org/linux-mm/388b9a93-423f-33f8-0495-2a4a290fd1aa@xxxxxxxxxx/
Thanks,
SJ
