From: Andrew Morton <akpm@linux-foundation.org>
To: mm-commits@vger.kernel.org,sj@kernel.org,gutierrez.asier@huawei-partners.com,akpm@linux-foundation.org
Subject: [merged mm-stable] docs-mm-damon-design-document-damon-actions-when-transparent_hugepage-is-off.patch removed from -mm tree
Date: Sat, 28 Mar 2026 17:41:57 -0700 [thread overview]
Message-ID: <20260329004157.BFD80C4CEF7@smtp.kernel.org> (raw)
The quilt patch titled
Subject: Docs/mm/damon/design: document DAMON actions when TRANSPARENT_HUGEPAGE is off
has been removed from the -mm tree. Its filename was
docs-mm-damon-design-document-damon-actions-when-transparent_hugepage-is-off.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
Subject: Docs/mm/damon/design: document DAMON actions when TRANSPARENT_HUGEPAGE is off
Date: Tue, 17 Mar 2026 20:53:47 -0700
MADV_HUGEPAGE and MADV_NOHUGEPAGE are guarded and they are not available
when compiling the kernel without TRANSPARENT_HUGEPAGE option. The DAMON
behaviour is to silently fail [1] in when DAMOS_HUGEPAGE or
DAMOS_NOHUGEPAGE are used, but TRANSPARENT_HUGEPAGE is disabled. Update
the DAMON documentation to reflect this behaviour.
Link: https://lkml.kernel.org/r/20260318035349.88715-1-sj@kernel.org
Link: https://lore.kernel.org/66131775-180b-4b9f-b7ce-61a3e077b6e6@huawei-partners.com/ [1]
Signed-off-by: Asier Gutierrez <gutierrez.asier@huawei-partners.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
Documentation/mm/damon/design.rst | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/Documentation/mm/damon/design.rst~docs-mm-damon-design-document-damon-actions-when-transparent_hugepage-is-off
+++ a/Documentation/mm/damon/design.rst
@@ -460,9 +460,13 @@ that supports each action are as below.
- ``pageout``: Reclaim the region.
Supported by ``vaddr``, ``fvaddr`` and ``paddr`` operations set.
- ``hugepage``: Call ``madvise()`` for the region with ``MADV_HUGEPAGE``.
- Supported by ``vaddr`` and ``fvaddr`` operations set.
+ Supported by ``vaddr`` and ``fvaddr`` operations set. When
+ TRANSPARENT_HUGEPAGE is disabled, the application of the action will just
+ fail.
- ``nohugepage``: Call ``madvise()`` for the region with ``MADV_NOHUGEPAGE``.
- Supported by ``vaddr`` and ``fvaddr`` operations set.
+ Supported by ``vaddr`` and ``fvaddr`` operations set. When
+ TRANSPARENT_HUGEPAGE is disabled, the application of the action will just
+ fail.
- ``lru_prio``: Prioritize the region on its LRU lists.
Supported by ``paddr`` operations set.
- ``lru_deprio``: Deprioritize the region on its LRU lists.
_
Patches currently in -mm which might be from gutierrez.asier@huawei-partners.com are
reply other threads:[~2026-03-29 0:41 UTC|newest]
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