From patchwork Tue Feb 22 17:00:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: SeongJae Park X-Patchwork-Id: 12755686 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 09063C433FE for ; Tue, 22 Feb 2022 17:01:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7AB128D0003; Tue, 22 Feb 2022 12:01:13 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 73A5B8D0005; Tue, 22 Feb 2022 12:01:13 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5F9968D0003; Tue, 22 Feb 2022 12:01:13 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0125.hostedemail.com [216.40.44.125]) by kanga.kvack.org (Postfix) with ESMTP id 505BE8D0001 for ; Tue, 22 Feb 2022 12:01:13 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 08D4D9F84D for ; Tue, 22 Feb 2022 17:01:13 +0000 (UTC) X-FDA: 79171031226.15.2046836 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by imf22.hostedemail.com (Postfix) with ESMTP id 15A28C0014 for ; Tue, 22 Feb 2022 17:01:11 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id EF41BCE138F; Tue, 22 Feb 2022 17:01:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6580C340F3; Tue, 22 Feb 2022 17:01:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1645549267; bh=39aGM7NlOoLZpgmNi6MB1SzF9U7sSJm7tFXEV8C9jgk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PpeSxOdgieBpb2HuJ2xeqElm5eBKelijp+KKuEHrsZVQf2uVih8WkryyO5VjnHslG xhG1Ipx94wrXOt3k5GiH+oaL0ai0Cna2OdVMpphGkNqNdWOaZeMxcfRgIiIkbXJywM oBjAO3qVoJMEqj8h5XU6/LVZjYyvQV0NI/p4Kqv+4eJaeb/ZYI/+0vPVAhICqC6DQg kOlyjy6cELoOpT54nyXNx29QZMFk6U3y9JYG9ZBv5Wrzbp6m6OY6WwDiLaUd7a1yOr iPtvNslEfFykVS0lHm0JT5Vp9sK52Xf+GwJDvQaADFJPn9AUKLgmevv+v/hU6QKMFC vtoGfRQLae27w== From: SeongJae Park To: akpm@linux-foundation.org Cc: corbet@lwn.net, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, SeongJae Park Subject: [PATCH 1/3] Docs/vm/damon: Call low level monitoring primitives the operations Date: Tue, 22 Feb 2022 17:00:58 +0000 Message-Id: <20220222170100.17068-2-sj@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220222170100.17068-1-sj@kernel.org> References: <20220222170100.17068-1-sj@kernel.org> Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=PpeSxOdg; dmarc=pass (policy=none) header.from=kernel.org; spf=pass (imf22.hostedemail.com: domain of sj@kernel.org designates 145.40.73.55 as permitted sender) smtp.mailfrom=sj@kernel.org X-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 15A28C0014 X-Stat-Signature: 6hqmnqranr84zxtgwke15tefyykd3bdq X-HE-Tag: 1645549271-967803 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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. Signed-off-by: SeongJae Park --- Documentation/vm/damon/design.rst | 24 ++++++++++++------------ Documentation/vm/damon/faq.rst | 2 +- 2 files changed, 13 insertions(+), 13 deletions(-) diff --git a/Documentation/vm/damon/design.rst b/Documentation/vm/damon/design.rst index 210f0f50efd8..c406983aeb31 100644 --- a/Documentation/vm/damon/design.rst +++ b/Documentation/vm/damon/design.rst @@ -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 diff --git a/Documentation/vm/damon/faq.rst b/Documentation/vm/damon/faq.rst index 11aea40eb328..dde7e2414ee6 100644 --- a/Documentation/vm/damon/faq.rst +++ b/Documentation/vm/damon/faq.rst @@ -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.