The patch titled
Subject: Docs/mm/damon/faq: remove old questions
has been added to the -mm mm-unstable branch. Its filename is
docs-mm-damon-faq-remove-old-questions.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-faq-remove-old-questions.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: SeongJae Park <sj@xxxxxxxxxx>
Subject: Docs/mm/damon/faq: remove old questions
Date: Thu, 25 May 2023 21:43:05 +0000
Patch series "Docs/mm/damon: Minor fixes and design doc update".
Some of the DAMON documents are outdated, or having minor typos or grammar
erros. Especially, the design doc has not updated for DAMOS, which is an
important part of DAMON. Fix the minor issues and update documents.
This patch (of 10):
The first two questions of DAMON faqs have raised when DAMON patches were
first submitted. More than one year has passed since DAMON patches get
merged in the mainline, and that kind of questions are not asked nowadays.
Remove the questions.
Link: https://lkml.kernel.org/r/20230525214314.5204-1-sj@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20230525214314.5204-2-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/mm/damon/faq.rst | 23 -----------------------
1 file changed, 23 deletions(-)
--- a/Documentation/mm/damon/faq.rst~docs-mm-damon-faq-remove-old-questions
+++ a/Documentation/mm/damon/faq.rst
@@ -4,29 +4,6 @@
Frequently Asked Questions
==========================
-Why a new subsystem, instead of extending perf or other user space tools?
-=========================================================================
-
-First, because it needs to be lightweight as much as possible so that it can be
-used online, any unnecessary overhead such as kernel - user space context
-switching cost should be avoided. Second, DAMON aims to be used by other
-programs including the kernel. Therefore, having a dependency on specific
-tools like perf is not desirable. These are the two biggest reasons why DAMON
-is implemented in the kernel space.
-
-
-Can 'idle pages tracking' or 'perf mem' substitute DAMON?
-=========================================================
-
-Idle page tracking is a low level primitive for access check of the physical
-address space. 'perf mem' is similar, though it can use sampling to minimize
-the overhead. On the other hand, DAMON is a higher-level framework for the
-monitoring of various address spaces. It is focused on memory management
-optimization and provides sophisticated accuracy/overhead handling mechanisms.
-Therefore, 'idle pages tracking' and 'perf mem' could provide a subset of
-DAMON's output, but cannot substitute DAMON.
-
-
Does DAMON support virtual memory only?
=======================================
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
docs-mm-damon-faq-remove-old-questions.patch
docs-mm-damon-maintainer-profile-fix-typos-and-grammar-errors.patch
docs-mm-damon-design-add-a-section-for-overall-architecture.patch
docs-mm-damon-design-update-the-layout-based-on-the-layers.patch
docs-mm-damon-design-rewrite-configurable-layers.patch
docs-mm-damon-design-add-a-section-for-the-relation-between-core-and-modules-layer.patch
docs-mm-damon-design-add-sections-for-basic-parts-of-damos.patch
docs-mm-damon-design-add-sections-for-advanced-features-of-damos.patch
docs-mm-damon-design-add-a-section-for-damon-core-api.patch
docs-mm-damon-design-add-a-section-for-the-modules-layer.patch
