linux-kernel - Re: [patch] mm, page_alloc: set num_movable in move

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Date:   Sun, 7 Oct 2018 15:35:36 -0700 (PDT)
From:   David Rientjes <rientjes@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
cc:     Vlastimil Babka <vbabka@...e.cz>, Greg Thelen <gthelen@...gle.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [patch] mm, page_alloc: set num_movable in move_freepages()

On Fri, 5 Oct 2018, Andrew Morton wrote:

> On Fri, 5 Oct 2018 13:56:39 -0700 (PDT) David Rientjes <rientjes@...gle.com> 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().