From: Song Hu <husong@kylinos.cn>
To: linux-mm@kvack.org, akpm@linux-foundation.org
Cc: david@kernel.org, ljs@kernel.org, ziy@nvidia.com,
baolin.wang@linux.alibaba.com, liam@infradead.org,
nico.pache@linux.dev, ryan.roberts@arm.com, dev.jain@arm.com,
baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev,
vbabka@kernel.org, rppt@kernel.org, surenb@google.com,
mhocko@suse.com, corbet@lwn.net, skhan@linuxfoundation.org,
rdunlap@infradead.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, Song Hu <husong@kylinos.cn>
Subject: [PATCH 2/2] Docs/mm: fix THP policy counts in transhuge
Date: Wed, 12 Aug 2026 16:03:13 +0800 [thread overview]
Message-ID: <20260812080313.330413-3-husong@kylinos.cn> (raw)
In-Reply-To: <20260812080313.330413-1-husong@kylinos.cn>
transhuge.rst claims seven policies for transparent_hugepage_shmem= and
four for transparent_hugepage_tmpfs=. Both boot parameters are parsed by
shmem_parse_huge(), which accepts six: always, within_size, advise, never,
deny and force. The "four" applies only to the per-mount huge= option
(shmem_param_enums_huge). Fix both counts to six.
Signed-off-by: Song Hu <husong@kylinos.cn>
---
Documentation/admin-guide/mm/transhuge.rst | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/Documentation/admin-guide/mm/transhuge.rst b/Documentation/admin-guide/mm/transhuge.rst
index b187d618452f..72e944f49da5 100644
--- a/Documentation/admin-guide/mm/transhuge.rst
+++ b/Documentation/admin-guide/mm/transhuge.rst
@@ -389,14 +389,14 @@ is not defined within a valid ``thp_anon``, its policy will default to
Similarly to ``transparent_hugepage``, you can control the hugepage
allocation policy for the internal shmem mount by using the kernel parameter
``transparent_hugepage_shmem=<policy>``, where ``<policy>`` is one of the
-seven valid policies for shmem (``always``, ``within_size``, ``advise``,
+six valid policies for shmem (``always``, ``within_size``, ``advise``,
``never``, ``deny``, and ``force``).
Similarly to ``transparent_hugepage_shmem``, you can control the default
hugepage allocation policy for the tmpfs mount by using the kernel parameter
``transparent_hugepage_tmpfs=<policy>``, where ``<policy>`` is one of the
-four valid policies for tmpfs (``always``, ``within_size``, ``advise``,
-``never``). The tmpfs mount default policy is ``never``.
+six valid policies for tmpfs (``always``, ``within_size``, ``advise``,
+``never``, ``deny``, and ``force``). The tmpfs mount default policy is ``never``.
Additionally, Kconfig options are available to set the default hugepage
policies for shmem (``CONFIG_TRANSPARENT_HUGEPAGE_SHMEM_HUGE_*``) and tmpfs
--
2.43.0
next prev parent reply other threads:[~2026-08-12 8:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-12 8:03 [PATCH 0/2] Docs: THP documentation fixes Song Hu
2026-08-12 8:03 ` [PATCH 1/2] Docs/ABI: document transparent_hugepage/shrink_underused Song Hu
2026-08-12 8:58 ` Lorenzo Stoakes (ARM)
2026-08-12 8:03 ` Song Hu [this message]
2026-08-12 8:41 ` [PATCH 2/2] Docs/mm: fix THP policy counts in transhuge Baolin Wang
2026-08-12 9:27 ` Lorenzo Stoakes (ARM)
2026-08-12 10:52 ` Baolin Wang
2026-08-12 10:55 ` Lorenzo Stoakes (ARM)
2026-08-15 8:58 ` Song Hu
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