linux-kernel - Re: [PATCH 1/2] mm, memory_hotplug: cleanup memory offline path

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Date:   Thu, 4 Apr 2019 15:25:09 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     David Hildenbrand <david@...hat.com>
Cc:     akpm@...ux-foundation.org, mhocko@...e.com,
        dan.j.williams@...el.com, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 1/2] mm, memory_hotplug: cleanup memory offline path

On Thu, Apr 04, 2019 at 03:18:00PM +0200, David Hildenbrand wrote:
> > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
> > index f206b8b66af1..d8a3e9554aec 100644
> > --- a/mm/memory_hotplug.c
> > +++ b/mm/memory_hotplug.c
> > @@ -1451,15 +1451,11 @@ static int
> >  offline_isolated_pages_cb(unsigned long start, unsigned long nr_pages,
> >  			void *data)
> >  {
> > -	__offline_isolated_pages(start, start + nr_pages);
> > -	return 0;
> > -}
> > +	unsigned long offlined_pages;
> >  
> > -static void
> > -offline_isolated_pages(unsigned long start_pfn, unsigned long end_pfn)
> > -{
> > -	walk_system_ram_range(start_pfn, end_pfn - start_pfn, NULL,
> > -				offline_isolated_pages_cb);
> > +	offlined_pages = __offline_isolated_pages(start, start + nr_pages);
> > +	*(unsigned long *)data += offlined_pages;
> 
> unsigned long *offlined_pages = data;
> 
> *offlined_pages += __offline_isolated_pages(start, start + nr_pages);

Yeah, more readable.

> Only nits

About the identation, I double checked the code and it looks fine to me.
In [1] looks fine too, might be your mail client?

[1] https://patchwork.kernel.org/patch/10885571/

> 
> Reviewed-by: David Hildenbrand <david@...hat.com>

Thanks ;-)

-- 
Oscar Salvador
SUSE L3