From nobody Sun Feb 8 07:25:30 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 204C853387; Mon, 19 Feb 2024 19:44:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708371881; cv=none; b=HMoFCH7zIeQ4yGssXZhKzGR/fx7MxfbD8qQuPsdZN9pPr9AxIRj3ejqTypPhtFHDYjsFde2wxnru2Wv+QmvkEoCNhTi/1eHUn/t4TJ5nUPNd0jXk0NVxPJ9H0VsGYTBdXIaObgxbzK0Wny1Z9qKEEZQTqmhAnsrdy5FMG+q5KBM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708371881; c=relaxed/simple; bh=rzYXRY+0g/n7Kn4lIsgWKL7FZXy8S0J6qwcWKx/b2nA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ZD/ZosR/v+vzS35IeOV0NvOYRYkDTsaqv3ztLckLgjnu82j7KGJqLn43O0JsBVk5u7zAXbudsTN+mLOMjy5ZQWyL6jFEDLgrOrb8PdnbOII6ZfY2r8+QGeUW0cC15uP5F2yckzZ3V7nrCYIbN3S9s8ZrhHtydr5b7Pthf7G2x2w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JmCv8hem; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JmCv8hem" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 41180C433B2; Mon, 19 Feb 2024 19:44:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708371880; bh=rzYXRY+0g/n7Kn4lIsgWKL7FZXy8S0J6qwcWKx/b2nA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JmCv8hemCSNgYrpk0Ff5mzvIxAHJ3jIHrdLuTVvCYP2smFXiNdJFrxas2R7s6aMTD VXDPpBUJN1p9KGnKN2lVRQ/qZxTQqQbnmdTl45LhAcXXZnWRkT/PWxRl/Rn7EXbTlx tQg8ZSSuCxUKk8kMw17YYl0Tey2AkJGW2D6FtYmyx2TkXUvbs87nrMyKTfgLAUTq3m HJcMUTNmM7XsPbJ5dVn9ZbBde4zoPcfekCrT886UNpCuAjstpOzlo8qqbu1WS0bXmF Ho0ojO1mPVMNxv90T0GcCt6rjzs1y3XRdPEdSztpAHgGZ0bLTYY3rbpscgrkFAR+zj D+AhW7SDqDk2A== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 03/20] mm/damon/sysfs: implement a kdamond command for updating schemes' effective quotas Date: Mon, 19 Feb 2024 11:44:14 -0800 Message-Id: <20240219194431.159606-4-sj@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240219194431.159606-1-sj@kernel.org> References: <20240219194431.159606-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Implement yet another kdamond 'state' file input command, namely 'update_schemes_effective_quotas'. If it is written, the 'effective_bytes' files of the kdamond will be updated to provide the current effective size quota of each scheme in bytes. Signed-off-by: SeongJae Park --- mm/damon/sysfs-common.h | 4 ++++ mm/damon/sysfs-schemes.c | 20 ++++++++++++++++++++ mm/damon/sysfs.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 56 insertions(+) diff --git a/mm/damon/sysfs-common.h b/mm/damon/sysfs-common.h index ec0703e1e90b..5a1ac15fb2f8 100644 --- a/mm/damon/sysfs-common.h +++ b/mm/damon/sysfs-common.h @@ -61,3 +61,7 @@ int damon_sysfs_schemes_clear_regions( =20 void damos_sysfs_set_quota_scores(struct damon_sysfs_schemes *sysfs_scheme= s, struct damon_ctx *ctx); + +void damos_sysfs_update_effective_quotas( + struct damon_sysfs_schemes *sysfs_schemes, + struct damon_ctx *ctx); diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index dd46b2db5455..9d90e7b757b7 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -1930,6 +1930,26 @@ void damos_sysfs_set_quota_scores(struct damon_sysfs= _schemes *sysfs_schemes, } } =20 +void damos_sysfs_update_effective_quotas( + struct damon_sysfs_schemes *sysfs_schemes, + struct damon_ctx *ctx) +{ + struct damos *scheme; + int schemes_idx =3D 0; + + damon_for_each_scheme(scheme, ctx) { + struct damon_sysfs_quotas *sysfs_quotas; + + /* user could have removed the scheme sysfs dir */ + if (schemes_idx >=3D sysfs_schemes->nr) + break; + + sysfs_quotas =3D + sysfs_schemes->schemes_arr[schemes_idx++]->quotas; + sysfs_quotas->effective_sz =3D scheme->quota.esz; + } +} + static struct damos *damon_sysfs_mk_scheme( struct damon_sysfs_scheme *sysfs_scheme) { diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 678de97fcc88..cc2d88a901f4 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -1019,6 +1019,11 @@ enum damon_sysfs_cmd { * regions */ DAMON_SYSFS_CMD_CLEAR_SCHEMES_TRIED_REGIONS, + /* + * @DAMON_SYSFS_CMD_UPDATE_SCHEMES_EFFECTIVE_QUOTAS: Update the + * effective size quota of the scheme in bytes. + */ + DAMON_SYSFS_CMD_UPDATE_SCHEMES_EFFECTIVE_QUOTAS, /* * @NR_DAMON_SYSFS_CMDS: Total number of DAMON sysfs commands. */ @@ -1035,6 +1040,7 @@ static const char * const damon_sysfs_cmd_strs[] =3D { "update_schemes_tried_bytes", "update_schemes_tried_regions", "clear_schemes_tried_regions", + "update_schemes_effective_quotas", }; =20 /* @@ -1375,6 +1381,29 @@ static int damon_sysfs_commit_schemes_quota_goals( return 0; } =20 +/* + * damon_sysfs_upd_schemes_effective_quotas() - Update schemes effective q= uotas + * sysfs files. + * @kdamond: The kobject wrapper that associated to the kdamond thread. + * + * This function reads the schemes' effective quotas of specific kdamond a= nd + * update the related values for sysfs files. This function should be cal= led + * from DAMON callbacks while holding ``damon_syfs_lock``, to safely acces= s the + * DAMON contexts-internal data and DAMON sysfs variables. + */ +static int damon_sysfs_upd_schemes_effective_quotas( + struct damon_sysfs_kdamond *kdamond) +{ + struct damon_ctx *ctx =3D kdamond->damon_ctx; + + if (!ctx) + return -EINVAL; + damos_sysfs_update_effective_quotas( + kdamond->contexts->contexts_arr[0]->schemes, ctx); + return 0; +} + + /* * damon_sysfs_cmd_request_callback() - DAMON callback for handling reques= ts. * @c: The DAMON context of the callback. @@ -1437,6 +1466,9 @@ static int damon_sysfs_cmd_request_callback(struct da= mon_ctx *c, bool active, case DAMON_SYSFS_CMD_CLEAR_SCHEMES_TRIED_REGIONS: err =3D damon_sysfs_clear_schemes_regions(kdamond); break; + case DAMON_SYSFS_CMD_UPDATE_SCHEMES_EFFECTIVE_QUOTAS: + err =3D damon_sysfs_upd_schemes_effective_quotas(kdamond); + break; default: break; } --=20 2.39.2