From nobody Mon Sep 15 21:02:30 2025 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 73696C61DB3 for ; Tue, 10 Jan 2023 19:05:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239770AbjAJTE6 (ORCPT ); Tue, 10 Jan 2023 14:04:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47100 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239227AbjAJTEJ (ORCPT ); Tue, 10 Jan 2023 14:04:09 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C02ACC4D; Tue, 10 Jan 2023 11:04:08 -0800 (PST) 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 ams.source.kernel.org (Postfix) with ESMTPS id 7ED63B8190F; Tue, 10 Jan 2023 19:04:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9BFFFC433F0; Tue, 10 Jan 2023 19:04:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1673377447; bh=z4OiBFIdAY53y3j04vvpLGBRlRRZlDz1MLs91H9dWgM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RLd4J3G76wYwVxSsaSIQPTKHrZbFVa3HMM1Gckqux+XKZcOj5l6ii9Jr0d5ojGaYb OaFXjgnAYAadqc1LQMKbr/wchU1RcH/S5srEO9WUXaQJQPM+kREfCpLLSMiLMLYf3H gDzFMCliEdHfnyVRMgNQz+xK5d0pqnAsKfUIEaT+Oexsy/K2x/qwH49JiW/wPCMoxr 9g8XpPSA1eSKwJO0CRhxv0rQ6oyzoFAibgVTGMFfGM+PwtytiJ2AY9IwPuYNlmbuFX 2fNEHHLpNzidac6lxcf3Yjhk5+923fksLblXxOfMoVoZtpzL1pk4Nnk8j+L3HhS2GP J9X688D+f9i7Q== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Jonathan Corbet , damon@lists.linux.dev, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/8] Docs/admin-guide/mm/damon/usage: update DAMOS actions/filters supports of each DAMON operations set Date: Tue, 10 Jan 2023 19:03:56 +0000 Message-Id: <20230110190400.119388-5-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230110190400.119388-1-sj@kernel.org> References: <20230110190400.119388-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Supports of each DAMOS action and filters are up to DAMON operations set implementation, but it's not mentioned in detail on the documentation. Update the information on the usage document. Signed-off-by: SeongJae Park --- Documentation/admin-guide/mm/damon/usage.rst | 41 +++++++++++++------- 1 file changed, 28 insertions(+), 13 deletions(-) diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/a= dmin-guide/mm/damon/usage.rst index 3d82ca6a17ff..9237d6a25897 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -279,14 +279,25 @@ The ``action`` file is for setting and getting what a= ction you want to apply to memory regions having specific access pattern of the interest. The keywor= ds that can be written to and read from the file and their meaning are as bel= ow. =20 - - ``willneed``: Call ``madvise()`` for the region with ``MADV_WILLNEED`` - - ``cold``: Call ``madvise()`` for the region with ``MADV_COLD`` - - ``pageout``: Call ``madvise()`` for the region with ``MADV_PAGEOUT`` - - ``hugepage``: Call ``madvise()`` for the region with ``MADV_HUGEPAGE`` - - ``nohugepage``: Call ``madvise()`` for the region with ``MADV_NOHUGEPAG= E`` +Note that support of each action depends on the running DAMON operations s= et +`implementation `. + + - ``willneed``: Call ``madvise()`` for the region with ``MADV_WILLNEED``. + Supported by ``vaddr`` and ``fvaddr`` operations set. + - ``cold``: Call ``madvise()`` for the region with ``MADV_COLD``. + Supported by ``vaddr`` and ``fvaddr`` operations set. + - ``pageout``: Call ``madvise()`` for the region with ``MADV_PAGEOUT``. + Supported by ``vaddr``, ``fvaddr`` and ``paddr`` operations set. + - ``hugepage``: Call ``madvise()`` for the region with ``MADV_HUGEPAGE``. + Supported by ``vaddr`` and ``fvaddr`` operations set. + - ``nohugepage``: Call ``madvise()`` for the region with ``MADV_NOHUGEPAG= E``. + Supported by ``vaddr`` and ``fvaddr`` operations set. - ``lru_prio``: Prioritize the region on its LRU lists. + Supported by ``paddr`` operations set. - ``lru_deprio``: Deprioritize the region on its LRU lists. - - ``stat``: Do nothing but count the statistics + Supported by ``paddr`` operations set. + - ``stat``: Do nothing but count the statistics. + Supported by all operations sets. =20 schemes//access_pattern/ --------------------------- @@ -388,8 +399,8 @@ pages of all memory cgroups except ``/having_care_alrea= dy``.:: echo /having_care_already > 1/memcg_path echo N > 1/matching =20 -Note that filters could be ignored depend on the running DAMON operations = set -`implementation `. +Note that filters are currently supported only when ``paddr`` +`implementation ` is being used. =20 .. _sysfs_schemes_stats: =20 @@ -618,11 +629,15 @@ The ```` is a predefined integer for memory m= anagement actions, which DAMON will apply to the regions having the target access pattern. The supported numbers and their meanings are as below. =20 - - 0: Call ``madvise()`` for the region with ``MADV_WILLNEED`` - - 1: Call ``madvise()`` for the region with ``MADV_COLD`` - - 2: Call ``madvise()`` for the region with ``MADV_PAGEOUT`` - - 3: Call ``madvise()`` for the region with ``MADV_HUGEPAGE`` - - 4: Call ``madvise()`` for the region with ``MADV_NOHUGEPAGE`` + - 0: Call ``madvise()`` for the region with ``MADV_WILLNEED``. Ignored if + ``target`` is ``paddr``. + - 1: Call ``madvise()`` for the region with ``MADV_COLD``. Ignored if + ``target`` is ``paddr``. + - 2: Call ``madvise()`` for the region with ``MADV_PAGEOUT``. + - 3: Call ``madvise()`` for the region with ``MADV_HUGEPAGE``. Ignored if + ``target`` is ``paddr``. + - 4: Call ``madvise()`` for the region with ``MADV_NOHUGEPAGE``. Ignored= if + ``target`` is ``paddr``. - 5: Do nothing but count the statistics =20 Quota --=20 2.25.1