linux-kernel - Re: [PATCH 1/2] mm: extract common code for calculating total memory size

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Date:   Wed, 01 Nov 2017 00:45:03 +0800
From:   "Yang Shi" <yang.s@...baba-inc.com>
To:     Christopher Lameter <cl@...ux.com>
Cc:     penberg@...nel.org, rientjes@...gle.com, iamjoonsoo.kim@....com,
        akpm@...ux-foundation.org, mhocko@...nel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mm: extract common code for calculating total memory
 size



On 10/27/17 9:51 AM, Yang Shi wrote:
> 
> 
> On 10/27/17 3:00 AM, Christopher Lameter wrote:
>> On Thu, 26 Oct 2017, Yang Shi wrote:
>>
>>> diff --git a/include/linux/mm.h b/include/linux/mm.h
>>> index 935c4d4..e21b81e 100644
>>> --- a/include/linux/mm.h
>>> +++ b/include/linux/mm.h
>>> @@ -2050,6 +2050,31 @@ extern int __meminit 
>>> __early_pfn_to_nid(unsigned long pfn,
>>>   static inline void zero_resv_unavail(void) {}
>>>   #endif
>>>
>>> +static inline void calc_mem_size(unsigned long *total, unsigned long 
>>> *reserved,
>>> +                 unsigned long *highmem)
>>> +{
>>
>> Huge incline function. This needs to go into mm/page_alloc.c or
>> mm/slab_common.c
> 
> It is used by lib/show_mem.c too. But since it is definitely on a hot 
> patch, I think I can change it to non inline.

I mean it is *not* on the hot path. Sorry for the typo and inconvenience.

Yang

> 
> Thanks,
> Yang
> 
>>