From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A1A9EC04A94 for ; Wed, 2 Aug 2023 21:48:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231331AbjHBVsU (ORCPT ); Wed, 2 Aug 2023 17:48:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232709AbjHBVrp (ORCPT ); Wed, 2 Aug 2023 17:47:45 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E67614488 for ; Wed, 2 Aug 2023 14:46:57 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6282461B4D for ; Wed, 2 Aug 2023 21:46:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B765DC433C7; Wed, 2 Aug 2023 21:46:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1691012814; bh=kBv80qQC/O/o5kPpv71k7LgUPk4HS4fQUKeP1OU7Rhk=; h=Date:To:From:Subject:From; b=sCNbpKh8UJwa38CV4AbUXDJZw3GgQFPvm58F8ZfRfyTq5h7zCrjMKXb0MmJQjLS2E XhHeN8sobji/XD4O7za1CxDkVJUWLomiPXEyWbe753jaZz7CJzB/Qy+yUUzFHUBwpD AmLJqVgNDMdnXz5UUgCLvOuVPAzZBt1A2HvoWUX8= Date: Wed, 02 Aug 2023 14:46:54 -0700 To: mm-commits@vger.kernel.org, shuah@kernel.org, corbet@lwn.net, sj@kernel.org, akpm@linux-foundation.org From: Andrew Morton Subject: + docs-admin-guide-mm-damon-usage-update-for-tried_regions-total_bytes.patch added to mm-unstable branch Message-Id: <20230802214654.B765DC433C7@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: Docs/admin-guide/mm/damon/usage: update for tried_regions/total_bytes has been added to the -mm mm-unstable branch. Its filename is docs-admin-guide-mm-damon-usage-update-for-tried_regions-total_bytes.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/docs-admin-guide-mm-damon-usage-update-for-tried_regions-total_bytes.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: SeongJae Park Subject: Docs/admin-guide/mm/damon/usage: update for tried_regions/total_bytes Date: Wed, 2 Aug 2023 21:32:21 +0000 Update the DAMON usage document for newly added schemes/.../tried_regions/total_bytes file and the update_schemes_tried_bytes command. Link: https://lkml.kernel.org/r/20230802213222.109841-6-sj@kernel.org Signed-off-by: SeongJae Park Cc: Jonathan Corbet Cc: Shuah Khan Signed-off-by: Andrew Morton --- Documentation/admin-guide/mm/damon/usage.rst | 42 ++++++++++------- 1 file changed, 27 insertions(+), 15 deletions(-) --- a/Documentation/admin-guide/mm/damon/usage.rst~docs-admin-guide-mm-damon-usage-update-for-tried_regions-total_bytes +++ a/Documentation/admin-guide/mm/damon/usage.rst @@ -87,7 +87,7 @@ comma (","). :: │ │ │ │ │ │ │ filters/nr_filters │ │ │ │ │ │ │ │ 0/type,matching,memcg_id │ │ │ │ │ │ │ stats/nr_tried,sz_tried,nr_applied,sz_applied,qt_exceeds - │ │ │ │ │ │ │ tried_regions/ + │ │ │ │ │ │ │ tried_regions/total_bytes │ │ │ │ │ │ │ │ 0/start,end,nr_accesses,age │ │ │ │ │ │ │ │ ... │ │ │ │ │ │ ... @@ -127,14 +127,18 @@ in the state. Writing ``commit`` to the user inputs in the sysfs files except ``state`` file again. Writing ``update_schemes_stats`` to ``state`` file updates the contents of stats files for each DAMON-based operation scheme of the kdamond. For details of the -stats, please refer to :ref:`stats section `. Writing -``update_schemes_tried_regions`` to ``state`` file updates the DAMON-based -operation scheme action tried regions directory for each DAMON-based operation -scheme of the kdamond. Writing ``clear_schemes_tried_regions`` to ``state`` -file clears the DAMON-based operating scheme action tried regions directory for -each DAMON-based operation scheme of the kdamond. For details of the -DAMON-based operation scheme action tried regions directory, please refer to -:ref:`tried_regions section `. +stats, please refer to :ref:`stats section `. + +Writing ``update_schemes_tried_regions`` to ``state`` file updates the +DAMON-based operation scheme action tried regions directory for each +DAMON-based operation scheme of the kdamond. Writing +``update_schemes_tried_bytes`` to ``state`` file updates only +``.../tried_regions/total_bytes`` files. Writing +``clear_schemes_tried_regions`` to ``state`` file clears the DAMON-based +operating scheme action tried regions directory for each DAMON-based operation +scheme of the kdamond. For details of the DAMON-based operation scheme action +tried regions directory, please refer to :ref:`tried_regions section +`. If the state is ``on``, reading ``pid`` shows the pid of the kdamond thread. @@ -406,13 +410,21 @@ stats by writing a special keyword, ``up schemes//tried_regions/ -------------------------- +This directory initially has one file, ``total_bytes``. + When a special keyword, ``update_schemes_tried_regions``, is written to the -relevant ``kdamonds//state`` file, DAMON creates directories named integer -starting from ``0`` under this directory. Each directory contains files -exposing detailed information about each of the memory region that the -corresponding scheme's ``action`` has tried to be applied under this directory, -during next :ref:`aggregation interval `. The -information includes address range, ``nr_accesses``, and ``age`` of the region. +relevant ``kdamonds//state`` file, DAMON updates the ``total_bytes`` file so +that reading it returns the total size of the scheme tried regions, and creates +directories named integer starting from ``0`` under this directory. Each +directory contains files exposing detailed information about each of the memory +region that the corresponding scheme's ``action`` has tried to be applied under +this directory, during next :ref:`aggregation interval +`. The information includes address range, +``nr_accesses``, and ``age`` of the region. + +Writing ``update_schemes_tried_bytes`` to the relevant ``kdamonds//state`` +file will only update the ``total_bytes`` file, and will not create the +subdirectories. The directories will be removed when another special keyword, ``clear_schemes_tried_regions``, is written to the relevant _ Patches currently in -mm which might be from sj@kernel.org are mm-damon-core-initialize-damo_filter-list-from-damos_new_filter.patch mm-damon-core-test-add-a-test-for-damos_new_filter.patch mm-damon-sysfs-schemes-implement-damos-tried-total-bytes-file.patch mm-damon-sysfs-implement-a-command-for-updating-only-schemes-tried-total-bytes.patch selftests-damon-sysfs-test-tried_regions-total_bytes-file.patch docs-abi-damon-update-for-tried_regions-total_bytes.patch docs-admin-guide-mm-damon-usage-update-for-tried_regions-total_bytes.patch