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

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Message-ID: <b746b524-af09-4ab5-858a-0a29f72a0ea7@linux.alibaba.com>
Date: Fri, 24 Oct 2025 09:40:59 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: Dmitry Ilvokhin <d@...okhin.com>,
 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>
Cc: 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 2025/10/24 02:12, 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.

Make sense to me.

> Signed-off-by: Dmitry Ilvokhin <d@...okhin.com>

With addressing Shakeel's comments:
Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>