Commit 561f4fc4 authored by SeongJae Park's avatar SeongJae Park Committed by Linus Torvalds

Docs/vm/damon: call low level monitoring primitives the operations

Patch series "Docs/damon: Update documents for better consistency".

Some of DAMON document are not properly updated for latest version.  This
patchset updates such parts.

This patch (of 3):

DAMON code calls the low level monitoring primitives implementations the
monitoring operations.  The documentation would have no problem at still
calling those primitives implementation because there is no real
difference in the concepts, but making it more consistent with the code
would make it better.  This commit therefore convert sentences in the doc
specifically pointing the implementations of the primitives to call it
monitoring operations.

Link: https://lkml.kernel.org/r/20220222170100.17068-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20220222170100.17068-2-sj@kernel.orgSigned-off-by: default avatarSeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 3213a3c1
......@@ -13,12 +13,13 @@ primitives that dependent on and optimized for the target address space. On
the other hand, the accuracy and overhead tradeoff mechanism, which is the core
of DAMON, is in the pure logic space. DAMON separates the two parts in
different layers and defines its interface to allow various low level
primitives implementations configurable with the core logic.
primitives implementations configurable with the core logic. We call the low
level primitives implementations monitoring operations.
Due to this separated design and the configurable interface, users can extend
DAMON for any address space by configuring the core logics with appropriate low
level primitive implementations. If appropriate one is not provided, users can
implement the primitives on their own.
DAMON for any address space by configuring the core logics with appropriate
monitoring operations. If appropriate one is not provided, users can implement
the operations on their own.
For example, physical memory, virtual memory, swap space, those for specific
processes, NUMA nodes, files, and backing memory devices would be supportable.
......@@ -26,25 +27,24 @@ Also, if some architectures or devices support special optimized access check
primitives, those will be easily configurable.
Reference Implementations of Address Space Specific Primitives
==============================================================
Reference Implementations of Address Space Specific Monitoring Operations
=========================================================================
The low level primitives for the fundamental access monitoring are defined in
two parts:
The monitoring operations are defined in two parts:
1. Identification of the monitoring target address range for the address space.
2. Access check of specific address range in the target space.
DAMON currently provides the implementations of the primitives for the physical
DAMON currently provides the implementations of the operations for the physical
and virtual address spaces. Below two subsections describe how those work.
VMA-based Target Address Range Construction
-------------------------------------------
This is only for the virtual address space primitives implementation. That for
the physical address space simply asks users to manually set the monitoring
target address ranges.
This is only for the virtual address space monitoring operations
implementation. That for the physical address space simply asks users to
manually set the monitoring target address ranges.
Only small parts in the super-huge virtual address space of the processes are
mapped to the physical memory and accessed. Thus, tracking the unmapped
......
......@@ -31,7 +31,7 @@ Does DAMON support virtual memory only?
=======================================
No. The core of the DAMON is address space independent. The address space
specific low level primitive parts including monitoring target regions
specific monitoring operations including monitoring target regions
constructions and actual access checks can be implemented and configured on the
DAMON core by the users. In this way, DAMON users can monitor any address
space with any access check technique.
......
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