From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Zi Yan <ziy@nvidia.com>, Matthew Wilcox <willy@infradead.org>
Cc: Song Liu <songliubraving@fb.com>, 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>,
Andrew Morton <akpm@linux-foundation.org>,
Lorenzo Stoakes <ljs@kernel.org>,
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
Subject: Re: [PATCH 7.2 v2 01/12] mm/khugepaged: remove READ_ONLY_THP_FOR_FS check
Date: Tue, 14 Apr 2026 12:20:19 +0200 [thread overview]
Message-ID: <45d8e6d2-66f3-4ce9-8f01-7c47cd81e4e5@kernel.org> (raw)
In-Reply-To: <CD565023-4FA6-44C4-8E40-8B06CB09B59F@nvidia.com>
>> huge=never Do not allocate huge pages. This is the default.
>> huge=always Attempt to allocate huge page every time a new page is needed.
>> huge=within_size Only allocate huge page if it will be fully within i_size.
>> Also respect madvise(2) hints.
>> huge=advise Only allocate huge page if requested with madvise(2).
>>
>> so what's the difference between huge=never and huge=madvise?
>
> I think madvise means MADV_HUGEPAGE for the region, not MADV_COLLAPSE.
Yes, most likely. The doc is quite old.
--
Cheers,
David
next prev parent reply other threads:[~2026-04-14 10:20 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-13 19:20 [PATCH 7.2 v2 00/12] Remove read-only THP support for FSes without large folio support Zi Yan
2026-04-13 19:20 ` [PATCH 7.2 v2 01/12] mm/khugepaged: remove READ_ONLY_THP_FOR_FS check Zi Yan
2026-04-13 20:20 ` Matthew Wilcox
2026-04-13 20:34 ` Zi Yan
2026-04-14 10:19 ` David Hildenbrand (Arm)
2026-04-14 10:20 ` David Hildenbrand (Arm) [this message]
2026-04-14 10:29 ` David Hildenbrand (Arm)
2026-04-14 15:37 ` Lance Yang
2026-04-14 15:43 ` Lance Yang
2026-04-14 15:59 ` Zi Yan
2026-04-13 19:20 ` [PATCH 7.2 v2 02/12] mm/khugepaged: add folio dirty check after try_to_unmap_flush() Zi Yan
2026-04-13 20:23 ` Matthew Wilcox
2026-04-13 20:28 ` Zi Yan
2026-04-14 10:38 ` David Hildenbrand (Arm)
2026-04-14 15:55 ` Zi Yan
2026-04-13 19:20 ` [PATCH 7.2 v2 03/12] mm/huge_memory: remove READ_ONLY_THP_FOR_FS from file_thp_enabled() Zi Yan
2026-04-14 10:40 ` David Hildenbrand (Arm)
2026-04-14 15:59 ` Zi Yan
2026-04-13 19:20 ` [PATCH 7.2 v2 04/12] mm: remove READ_ONLY_THP_FOR_FS Kconfig option Zi Yan
2026-04-14 10:40 ` David Hildenbrand (Arm)
2026-04-13 19:20 ` [PATCH 7.2 v2 05/12] mm/khugepaged: remove READ_ONLY_THP_FOR_FS check in hugepage_pmd_enabled() Zi Yan
2026-04-13 20:33 ` Matthew Wilcox
2026-04-13 20:42 ` Zi Yan
2026-04-14 11:02 ` David Hildenbrand (Arm)
2026-04-14 16:30 ` Zi Yan
2026-04-14 18:14 ` David Hildenbrand (Arm)
2026-04-14 18:25 ` Zi Yan
2026-04-13 19:20 ` [PATCH 7.2 v2 06/12] mm: fs: remove filemap_nr_thps*() functions and their users Zi Yan
2026-04-13 20:35 ` Matthew Wilcox
2026-04-14 11:02 ` David Hildenbrand (Arm)
2026-04-13 19:20 ` [PATCH 7.2 v2 07/12] fs: remove nr_thps from struct address_space Zi Yan
2026-04-13 20:38 ` Matthew Wilcox
2026-04-13 19:20 ` [PATCH 7.2 v2 08/12] mm/huge_memory: remove folio split check for READ_ONLY_THP_FOR_FS Zi Yan
2026-04-13 20:41 ` Matthew Wilcox
2026-04-13 20:46 ` Zi Yan
2026-04-14 11:03 ` David Hildenbrand (Arm)
2026-04-13 19:20 ` [PATCH 7.2 v2 09/12] mm/truncate: use folio_split() in truncate_inode_partial_folio() Zi Yan
2026-04-13 19:20 ` [PATCH 7.2 v2 10/12] fs/btrfs: remove a comment referring to READ_ONLY_THP_FOR_FS Zi Yan
2026-04-14 11:06 ` David Hildenbrand (Arm)
2026-04-13 19:20 ` [PATCH 7.2 v2 11/12] selftests/mm: remove READ_ONLY_THP_FOR_FS in khugepaged Zi Yan
2026-04-14 11:06 ` David Hildenbrand (Arm)
2026-04-13 19:20 ` [PATCH 7.2 v2 12/12] selftests/mm: remove READ_ONLY_THP_FOR_FS from comments in guard-regions Zi Yan
2026-04-13 20:47 ` Matthew Wilcox
2026-04-13 20:51 ` Zi Yan
2026-04-13 22:28 ` Matthew Wilcox
2026-04-14 11:09 ` David Hildenbrand (Arm)
2026-04-14 16:45 ` Zi Yan
2026-04-14 17:40 ` Matthew Wilcox
2026-04-14 17:53 ` Zi Yan
2026-04-14 11:07 ` David Hildenbrand (Arm)
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