linux-kernel - Re: [PATCH v5 12/12] Documentation: mm: update the admin guide for mTHP collapse

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

Message-ID: <6fd003dc-2a2d-ca15-e7b6-9af988fdbc3f@gentwo.org>
Date: Tue, 29 Apr 2025 09:38:49 -0700 (PDT)
From: "Christoph Lameter (Ampere)" <cl@...two.org>
To: Nico Pache <npache@...hat.com>
cc: linux-mm@...ck.org, linux-doc@...r.kernel.org, 
    linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
    akpm@...ux-foundation.org, corbet@....net, rostedt@...dmis.org, 
    mhiramat@...nel.org, mathieu.desnoyers@...icios.com, david@...hat.com, 
    baohua@...nel.org, baolin.wang@...ux.alibaba.com, ryan.roberts@....com, 
    willy@...radead.org, peterx@...hat.com, ziy@...dia.com, 
    wangkefeng.wang@...wei.com, usamaarif642@...il.com, sunnanyong@...wei.com, 
    vishal.moola@...il.com, thomas.hellstrom@...ux.intel.com, 
    yang@...amperecomputing.com, kirill.shutemov@...ux.intel.com, 
    aarcange@...hat.com, raquini@...hat.com, dev.jain@....com, 
    anshuman.khandual@....com, catalin.marinas@....com, tiwai@...e.de, 
    will@...nel.org, dave.hansen@...ux.intel.com, jack@...e.cz, 
    jglisse@...gle.com, surenb@...gle.com, zokeefe@...gle.com, 
    hannes@...xchg.org, rientjes@...gle.com, mhocko@...e.com, 
    rdunlap@...radead.org, lorenzo.stoakes@...cle.com, Liam.Howlett@...cle.com
Subject: Re: [PATCH v5 12/12] Documentation: mm: update the admin guide for
 mTHP collapse

On Mon, 28 Apr 2025, Nico Pache wrote:

>  THP can be enabled system wide or restricted to certain tasks or even
>  memory ranges inside task's address space. Unless THP is completely
>  disabled, there is ``khugepaged`` daemon that scans memory and
> -collapses sequences of basic pages into PMD-sized huge pages.
> +collapses sequences of basic pages into huge pages.

huge pages usually have a fixed size like 2M and are tied to the page
table levels.

Would it not be advisable to use a different term here like "large folio"
or "mTHP sized folio" or something like that?