Docs/damon: update outdated term 'regions update interval'

Before DAMON is merged in the mainline, the concept of 'regions update
interval' has generalized to be used as the time interval for update of
any monitoring operations related data structure, but the document has not
updated properly.  This commit updates the document for better
consistency.

Link: https://lkml.kernel.org/r/20220222170100.17068-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: sjp38

Documentation/admin-guide/mm/damon/usage.rst

@@ -47,7 +47,7 @@ Attributes
 ----------
 
 Users can get and set the ``sampling interval``, ``aggregation interval``,
-``regions update interval``, and min/max number of monitoring target regions by
+``update interval``, and min/max number of monitoring target regions by
 reading from and writing to the ``attrs`` file.  To know about the monitoring
 attributes in detail, please refer to the :doc:`/vm/damon/design`.  For
 example, below commands set those values to 5 ms, 100 ms, 1,000 ms, 10 and
@@ -128,8 +128,8 @@ ranges, ``20-40`` and ``50-100`` as that of pid 4242, which is the second one
 
 Note that this sets the initial monitoring target regions only.  In case of
 virtual memory monitoring, DAMON will automatically updates the boundary of the
-regions after one ``regions update interval``.  Therefore, users should set the
-``regions update interval`` large enough in this case, if they don't want the
+regions after one ``update interval``.  Therefore, users should set the
+``update interval`` large enough in this case, if they don't want the
 update.
 
 

Documentation/vm/damon/design.rst

@@ -95,8 +95,8 @@ Address Space Independent Core Mechanisms
 
 Below four sections describe each of the DAMON core mechanisms and the five
 monitoring attributes, ``sampling interval``, ``aggregation interval``,
-``regions update interval``, ``minimum number of regions``, and ``maximum
-number of regions``.
+``update interval``, ``minimum number of regions``, and ``maximum number of
+regions``.
 
 
 Access Frequency Monitoring
@@ -169,6 +169,8 @@ The monitoring target address range could dynamically changed.  For example,
 virtual memory could be dynamically mapped and unmapped.  Physical memory could
 be hot-plugged.
 
-As the changes could be quite frequent in some cases, DAMON checks the dynamic
-memory mapping changes and applies it to the abstracted target area only for
-each of a user-specified time interval (``regions update interval``).
+As the changes could be quite frequent in some cases, DAMON allows the
+monitoring operations to check dynamic changes including memory mapping changes
+and applies it to monitoring operations-related data structures such as the
+abstracted monitoring target memory area only for each of a user-specified time
+interval (``update interval``).