From: Zi Yan <ziy@nvidia.com>
To: Andrew Morton <akpm@linux-foundation.org>,
David Hildenbrand <david@kernel.org>,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
Song Liu <songliubraving@fb.com>
Cc: Chris Mason <clm@fb.com>, David Sterba <dsterba@suse.com>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
Lorenzo Stoakes <ljs@kernel.org>, Zi Yan <ziy@nvidia.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
"Liam R. Howlett" <Liam.Howlett@oracle.com>,
Nico Pache <npache@redhat.com>,
Ryan Roberts <ryan.roberts@arm.com>, Dev Jain <dev.jain@arm.com>,
Barry Song <baohua@kernel.org>, Lance Yang <lance.yang@linux.dev>,
Vlastimil Babka <vbabka@kernel.org>,
Mike Rapoport <rppt@kernel.org>,
Suren Baghdasaryan <surenb@google.com>,
Michal Hocko <mhocko@suse.com>, Shuah Khan <shuah@kernel.org>,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kselftest@vger.kernel.org,
Liam Howlett <liam@infradead.org>
Subject: [PATCH v6 05/14] mm: remove READ_ONLY_THP_FOR_FS Kconfig option
Date: Sun, 17 May 2026 09:54:07 -0400 [thread overview]
Message-ID: <20260517135416.1434539-6-ziy@nvidia.com> (raw)
In-Reply-To: <20260517135416.1434539-1-ziy@nvidia.com>
After removing READ_ONLY_THP_FOR_FS check in file_thp_enabled(),
khugepaged and MADV_COLLAPSE can run on FSes with PMD THP pagecache
support even without READ_ONLY_THP_FOR_FS enabled. Remove the Kconfig
first so that no one can use READ_ONLY_THP_FOR_FS as upcoming commits
remove mapping->nr_thps, which its safe guard mechanism relies on.
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Nico Pache <npache@redhat.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Barry Song <baohua@kernel.org>
Cc: Chris Mason <clm@fb.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Sterba <dsterba@suse.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Liam Howlett <liam@infradead.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
---
mm/Kconfig | 11 -----------
1 file changed, 11 deletions(-)
diff --git a/mm/Kconfig b/mm/Kconfig
index e221fa1dc54d0..27dc5b0139ba6 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -936,17 +936,6 @@ config THP_SWAP
For selection by architectures with reasonable THP sizes.
-config READ_ONLY_THP_FOR_FS
- bool "Read-only THP for filesystems (EXPERIMENTAL)"
- depends on TRANSPARENT_HUGEPAGE
-
- help
- Allow khugepaged to put read-only file-backed pages in THP.
-
- This is marked experimental because it is a new feature. Write
- support of file THPs will be developed in the next few release
- cycles.
-
config NO_PAGE_MAPCOUNT
bool "No per-page mapcount (EXPERIMENTAL)"
help
--
2.53.0
next prev parent reply other threads:[~2026-05-17 13:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-17 13:54 [PATCH v6 00/14] Remove CONFIG_READ_ONLY_THP_FOR_FS and enable file THP for writable files Zi Yan
2026-05-17 13:54 ` [PATCH v6 01/14] mm/khugepaged: remove READ_ONLY_THP_FOR_FS check Zi Yan
2026-05-17 13:54 ` [PATCH v6 02/14] mm/khugepaged: add folio dirty check after try_to_unmap() Zi Yan
2026-05-17 13:54 ` [PATCH v6 03/14] mm/huge_memory: remove READ_ONLY_THP_FOR_FS from file_thp_enabled() Zi Yan
2026-05-17 13:54 ` [PATCH v6 04/14] mm/khugepaged: remove READ_ONLY_THP_FOR_FS check in hugepage_enabled() Zi Yan
2026-05-17 13:54 ` Zi Yan [this message]
2026-05-17 13:54 ` [PATCH v6 06/14] mm: fs: remove filemap_nr_thps*() functions and their users Zi Yan
2026-05-17 13:54 ` [PATCH v6 07/14] fs: remove nr_thps from struct address_space Zi Yan
2026-05-17 13:54 ` [PATCH v6 08/14] mm/huge_memory: remove folio split check for READ_ONLY_THP_FOR_FS Zi Yan
2026-05-17 13:54 ` [PATCH v6 09/14] mm/truncate: use folio_split() in truncate_inode_partial_folio() Zi Yan
2026-05-17 13:54 ` [PATCH v6 10/14] fs/btrfs: remove a comment referring to READ_ONLY_THP_FOR_FS Zi Yan
2026-05-17 13:54 ` [PATCH v6 11/14] selftests/mm: remove READ_ONLY_THP_FOR_FS in khugepaged Zi Yan
2026-05-17 13:54 ` [PATCH v6 12/14] selftests/mm: remove READ_ONLY_THP_FOR_FS code from guard-regions Zi Yan
2026-05-17 13:54 ` [PATCH v6 13/14] mm/khugepaged: enable clean pagecache folio collapse for writable files Zi Yan
2026-05-17 13:54 ` [PATCH v6 14/14] selftests/mm: add writable-file collapse tests for khugepaged Zi Yan
2026-05-18 22:21 ` [PATCH v6 00/14] Remove CONFIG_READ_ONLY_THP_FOR_FS and enable file THP for writable files Andrew Morton
2026-05-18 23:39 ` Zi Yan
2026-05-19 0:45 ` Andrew Morton
2026-05-19 0:59 ` Zi Yan
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