Commit ff0b5905 authored Feb 25, 2024 by Barry Song Committed by Andrew Morton Mar 04, 2024

Docs/mm/damon/design: remove the details for pageout as paddr doesn't use MADV_PAGEOUT

The doc needs a 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@gmail.com


Signed-off-by: Barry Song <v-songbaohua@oppo.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent 8cc92a67

Documentation/mm/damon/design.rst

+1 −1

Original line number	Diff line number	Diff line
		@@ -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.