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

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Date:   Thu, 4 Apr 2019 16:47:43 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Oscar Salvador <osalvador@...e.de>
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 04.04.19 15:25, Oscar Salvador wrote:
> 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/

Double checked, alignment on the parameter on the new line is very weird.

And both lines cross 80 lines per line ... nit :)

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


-- 

Thanks,

David / dhildenb