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

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Message-ID: <aPstDXRerYqi1O2X@tiehlicka>
Date: Fri, 24 Oct 2025 09:38:53 +0200
From: Michal Hocko <mhocko@...e.com>
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>,
	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 23-10-25 18:12:02, 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.

Being consistent is usually nice but you are not telling us _who_ is
going to benefit from this. Increasing the config space is not really
free. So please focus on Why do we need it rather than it is consistent
argument.

-- 
Michal Hocko
SUSE Labs