Re: [patch] mm, page_alloc: set num_movable in move_freepages()

[David Rientjes <rientjes@xxxxxxxxxx>]

On Fri, 5 Oct 2018, Andrew Morton wrote:

> On Fri, 5 Oct 2018 13:56:39 -0700 (PDT) David Rientjes <rientjes@xxxxxxxxxx> wrote:
> 
> > If move_freepages() returns 0 because zone_spans_pfn(), *num_movable can
> 
>      move_free_pages_block()?           !zone_spans_pfn()?
> 

move_freepages_block() more accurately, yes.  And yes, it depends on the 
return value of zone_spans_pfn().