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

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Message-ID: <180e8cff-b0e9-bed7-2283-3a96d97fdf62@alibaba-inc.com>
Date:   Sat, 28 Oct 2017 00:51:26 +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 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.

Thanks,
Yang

>