linux-kernel - Re: [PATCH 1/6] prctl: introduce PR_THP_POLICY_DEFAULT

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Message-ID: <c3c264fa-b74c-42ba-a3ad-615715c8fa80@redhat.com>
Date: Thu, 15 May 2025 19:29:59 +0200
From: David Hildenbrand <david@...hat.com>
To: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: "Liam R. Howlett" <Liam.Howlett@...cle.com>,
 Usama Arif <usamaarif642@...il.com>,
 Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
 hannes@...xchg.org, shakeel.butt@...ux.dev, riel@...riel.com,
 ziy@...dia.com, laoar.shao@...il.com, baolin.wang@...ux.alibaba.com,
 npache@...hat.com, ryan.roberts@....com, linux-kernel@...r.kernel.org,
 linux-doc@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH 1/6] prctl: introduce PR_THP_POLICY_DEFAULT_HUGE for the
 process

>>
> 
> Did we document all this? :)
> 
> It'd be good to be super explicit about these sorts of 'dependency chains'.
> 

Documentation/admin-guide/mm/transhuge.rst has under "Global THP 
controls" quite some stuff about all that, yes.

The whole document needs an overhaul, to clarify on the whole 
terminology, make it consistent, and better explain how the pagecache 
behaves etc. On my todo list, but I'm afraid it will be a bit of work to 
get it right / please most people.

-- 
Cheers,

David / dhildenb