linux-kernel - [PATCH 11/13] Docs/mm/damon/design: update for DAMON monitoring target type DAMOS filter

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Message-Id: <20230802214312.110532-12-sj@kernel.org>
Date:   Wed,  2 Aug 2023 21:43:10 +0000
From:   SeongJae Park <sj@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     SeongJae Park <sj@...nel.org>, Jonathan Corbet <corbet@....net>,
        damon@...ts.linux.dev, linux-mm@...ck.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 11/13] Docs/mm/damon/design: update for DAMON monitoring target type DAMOS filter

Update DAMON design document for the newly added DAMON monitoring target
type DAMOS filter.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 Documentation/mm/damon/design.rst | 33 +++++++++++++++++--------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst
index 134912166f5a..a20383d01a95 100644
--- a/Documentation/mm/damon/design.rst
+++ b/Documentation/mm/damon/design.rst
@@ -380,21 +380,24 @@ number of filters for each scheme.  Each filter specifies the type of target
 memory, and whether it should exclude the memory of the type (filter-out), or
 all except the memory of the type (filter-in).
 
-Currently, anonymous page, memory cgroup, and address range type filters are
-supported by the feature.  Some filter target types can require additional
-arguments.  For example, the memory cgroup filter type asks users to specify
-the file path of the memory cgroup for the filter, while the address range type
-asks the start and end addresses of the range.  Hence, users can apply specific
-schemes to only anonymous pages, non-anonymous pages, pages of specific
-cgroups, all pages excluding those of specific cgroups, pages in specific
-address range, and any combination of those.
-
-To handle filters efficiently, the address range type filter is handled by the
-core layer, while others are handled by operations set.  If a memory region is
-filtered by the core layer-handled filter, it is not counted as the scheme has
-tried to the region.  In contrast, if a memory regions is filtered by an
-operations set layer-handled filter, it is counted as the scheme has tried.
-The difference in accounting leads to changes in the statistics.
+Currently, anonymous page, memory cgroup, address range, and DAMON monitoring
+target type filters are supported by the feature.  Some filter target types
+require additional arguments.  The memory cgroup filter type asks users to
+specify the file path of the memory cgroup for the filter.  The address range
+type asks the start and end addresses of the range.  The DAMON monitoring
+target type asks the index of the target from the context's monitoring targets
+list.  Hence, users can apply specific schemes to only anonymous pages,
+non-anonymous pages, pages of specific cgroups, all pages excluding those of
+specific cgroups, pages in specific address range, pages in specific DAMON
+monitoring targets, and any combination of those.
+
+To handle filters efficiently, the address range and DAMON monitoring target
+type filters are handled by the core layer, while others are handled by
+operations set.  If a memory region is filtered by a core layer-handled filter,
+it is not counted as the scheme has tried to the region.  In contrast, if a
+memory regions is filtered by an operations set layer-handled filter, it is
+counted as the scheme has tried.  The difference in accounting leads to changes
+in the statistics.
 
 
 Application Programming Interface
-- 
2.25.1