linux-kernel - Re: [PATCH v2] mm: fix the inaccurate memory statistics issue for users

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <624c702b-d149-4025-9557-88736681246b@redhat.com>
Date: Fri, 4 Jul 2025 16:14:19 -0400
From: Luiz Capitulino <luizcap@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Vlastimil Babka <vbabka@...e.cz>,
 Baolin Wang <baolin.wang@...ux.alibaba.com>,
 "Ritesh Harjani (IBM)" <ritesh.list@...il.com>,
 Michal Hocko <mhocko@...e.com>, david@...hat.com, shakeel.butt@...ux.dev,
 lorenzo.stoakes@...cle.com, Liam.Howlett@...cle.com, rppt@...nel.org,
 surenb@...gle.com, donettom@...ux.ibm.com, aboorvad@...ux.ibm.com,
 sj@...nel.org, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mm: fix the inaccurate memory statistics issue for
 users

On 2025-07-04 16:11, Andrew Morton wrote:
> On Fri, 4 Jul 2025 14:22:11 -0400 Luiz Capitulino <luizcap@...hat.com> wrote:
> 
>>> The patch is simple enough.  I'll add fixes:f1a7941243c1 and cc:stable
>>> and, as the problem has been there for years, I'll leave the patch in
>>> mm-unstable so it will eventually get into LTS, in a well tested state.
>>
>> Andrew, are you considering submitting this patch for 6.16? I think
>> we should, it does look like a regression for larger systems built
>> with 64k base page size.
> 
> I wasn't planning on 6.16-rcX because it's been there for years but
> sure, I moved it into the mm-hotfixes pile so it'll go Linuswards next
> week.

Wonderful, thank you!

> 
>> On comparing a very simple app which just allocates & touches some
>> memory against v6.1 (which doesn't have f1a7941243c1) and latest
>> Linus tree (4c06e63b9203) I can see that on latest Linus tree the
>> values for VmRSS, RssAnon and RssFile from /proc/self/status are
>> all zeroes while they do report values on v6.1 and a Linus tree
>> with this patch.
> 
> Cool, I'll paste this para into the changelog to help people link this
> patch with wrong behavior which they are observing.

OK.