linux-kernel - Re: [PATCH] mm: show stats for non-default hugepage sizes in /proc/meminfo

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Message-ID: <c716ac71-f467-dcbe-520f-91b007309a4d@intel.com>
Date:   Mon, 13 Nov 2017 10:17:30 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     Roman Gushchin <guro@...com>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Andrea Arcangeli <aarcange@...hat.com>, kernel-team@...com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: show stats for non-default hugepage sizes in
 /proc/meminfo

On 11/13/2017 10:11 AM, Roman Gushchin wrote:
> On Mon, Nov 13, 2017 at 09:06:32AM -0800, Dave Hansen wrote:
>> On 11/13/2017 08:03 AM, Roman Gushchin wrote:
>>> To solve this problem, let's display stats for all hugepage sizes.
>>> To provide the backward compatibility let's save the existing format
>>> for the default size, and add a prefix (e.g. 1G_) for non-default sizes.
>>
>> Is there something keeping you from using the sysfs version of this
>> information?
> 
> Just answered the same question to Michal.
> 
> In two words: it would be nice to have a high-level overview of
> memory usage in the system in /proc/meminfo. 

I don't think it's worth cluttering up meminfo for this, imnho.