linux-kernel - Re: [PATCH] mm: shmem/tmpfs hugepage defaults config choice

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Message-ID: <qjqtaukb3yw36eiwktayyv4zhihgz32yy2yolpqvxn5yaeuo3i@fvznetjxhker>
Date: Thu, 23 Oct 2025 14:26:00 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: Dmitry Ilvokhin <d@...okhin.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>, 
	David Hildenbrand <david@...hat.com>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, 
	"Liam R. Howlett" <Liam.Howlett@...cle.com>, Vlastimil Babka <vbabka@...e.cz>, 
	Mike Rapoport <rppt@...nel.org>, Suren Baghdasaryan <surenb@...gle.com>, 
	Michal Hocko <mhocko@...e.com>, Hugh Dickins <hughd@...gle.com>, 
	Baolin Wang <baolin.wang@...ux.alibaba.com>, Kiryl Shutsemau <kas@...nel.org>, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org, kernel-team@...a.com
Subject: Re: [PATCH] mm: shmem/tmpfs hugepage defaults config choice

On Thu, Oct 23, 2025 at 06:12:02PM +0000, Dmitry Ilvokhin wrote:
> Allow to override defaults for shemem and tmpfs at config time. This is
> consistent with how transparent hugepages can be configured.
> 
> Same results can be achieved with the existing
> 'transparent_hugepage_shmem' and 'transparent_hugepage_tmpfs' settings
> in the kernel command line, but it is more convenient to define basic
> settings at config time instead of changing kernel command line later.
> 
> Defaults for shmem and tmpfs were not changed. They are remained the
> same as before: 'never' for both cases. Options 'deny' and 'force' are
> omitted intentionally since these are special values and supposed to be
> used for emergencies or testing and are not expected to be permanent
> ones.
> 
> Signed-off-by: Dmitry Ilvokhin <d@...okhin.com>

This looks good. I would recommend to also update
Documentation/admin-guide/mm/transhuge.rst with this build config
information.