The patch titled
Subject: Docs/mm/damon/design: remove the details for pageout as paddr doesn't use MADV_PAGEOUT
has been added to the -mm mm-unstable branch. Its filename is
docs-mm-damon-design-remove-the-details-for-pageout-as-paddr-doesnt-use-madv_pageout.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-mm-damon-design-remove-the-details-for-pageout-as-paddr-doesnt-use-madv_pageout.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Barry Song <v-songbaohua@xxxxxxxx>
Subject: Docs/mm/damon/design: remove the details for pageout as paddr doesn't use MADV_PAGEOUT
Date: Sun, 25 Feb 2024 11:47:51 +1300
The doc needs fix. As only in the case of virtual address, we are calling
madvise() with MADV_PAGEOUT. But in the case of physical address, we are
calling reclaim_pages() directly. MADV_PAGEOUT on virtual address is much
more aggresive to reclaim memory compared to reclaim_pages() on paddr
region. This patch removes the details so that the description can apply
to both cases. And we don't need to couple with the implementation
details.
Link: https://lkml.kernel.org/r/20240224224751.4673-1-21cnbao@xxxxxxxxx
Signed-off-by: Barry Song <v-songbaohua@xxxxxxxx>
Cc: SeongJae Park <sj@xxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/mm/damon/design.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/Documentation/mm/damon/design.rst~docs-mm-damon-design-remove-the-details-for-pageout-as-paddr-doesnt-use-madv_pageout
+++ a/Documentation/mm/damon/design.rst
@@ -315,7 +315,7 @@ that supports each action are as below.
Supported by ``vaddr`` and ``fvaddr`` operations set.
- ``cold``: Call ``madvise()`` for the region with ``MADV_COLD``.
Supported by ``vaddr`` and ``fvaddr`` operations set.
- - ``pageout``: Call ``madvise()`` for the region with ``MADV_PAGEOUT``.
+ - ``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.
_
Patches currently in -mm which might be from v-songbaohua@xxxxxxxx are
docs-mm-damon-design-remove-the-details-for-pageout-as-paddr-doesnt-use-madv_pageout.patch
