linux-kernel - Re: [RFC] why the amount of cache from "free -m" and /proc/meminfo are different?

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Message-ID: <56B54A2C.5010407@huawei.com>
Date:	Sat, 6 Feb 2016 09:19:40 +0800
From:	Xishi Qiu <qiuxishi@...wei.com>
To:	"Daniel K." <dk@...e.no>
CC:	Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] why the amount of cache from "free -m" and /proc/meminfo
 are different?

On 2016/2/5 19:44, Daniel K. wrote:

> On 02/05/2016 07:50 AM, Xishi Qiu wrote:
>> [root@...alhost ~]# free -m
>>               total        used        free      shared  buff/cache   available
>> Mem:          48295         574       41658           8        6062       46344
>> Swap:         24191           0       24191
>>
>> [root@...alhost ~]# cat /proc/meminfo
>> Buffers:               0 kB
>> Cached:          3727824 kB
>> Slab:            2480092 kB
> 
> free and meminfo seems to match up pretty well to me.
> 
> Are you really asking about display in MB vs kB?
> 

Hi Daniel,

No, I mean "Cached: 3727824 kB" and "buff/cache 6062M" are different.

Does "buff/cache" include Buffers, Cached, and Slab?

Thanks,
Xishi Qiu

> Drop the -m switch to free.
> 
> Also, give 'man free' a spin, it explains what's behind the numbers.
> 
> 
> Daniel K.
> 
> .
>