From mboxrd@z Thu Jan 1 00:00:00 1970 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 893B058105; Mon, 19 Feb 2024 19:44:47 +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=1708371887; cv=none; b=r6TacEL73/QonReLyR2UYL9sPGdTbDmJ7pBMJXZnAvfN91Z0HzUGFMN5LnpYehdn6aJjjfEEL47Cd53qTZFgYk07Xj4DttExWyoaUrBkcn7uMfBIhx6EezjGfVcDG4u+6fV8iP1veP0Z7BlQDxmXMnCD8OGkNq1ZJueTAHjfmzE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708371887; c=relaxed/simple; bh=CUFUQFRYuN+1nr4LagyWWgpSfoijjUeoeRxWSSISzx0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PeiQHEeFAuCdhUpxDxEGa8/2s8rG0LXCmPgdEhIAfubyfQvD5MCoY23pdwCu0qZStKiAYCBxpRH60N3gODsSLTLirgdlt6TbjN2htQSV7FdFHSu5RtKLZz4FEe/mlbUGKpDdA4KoCGiVmeP7yWVH5tPSudyA7bCR84cfcawm4T4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KOTw5DPt; 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="KOTw5DPt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3ADEC43394; Mon, 19 Feb 2024 19:44:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708371887; bh=CUFUQFRYuN+1nr4LagyWWgpSfoijjUeoeRxWSSISzx0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KOTw5DPtqz7EDT+Ul/z9K5LjGneHPwrOsY/SajlL5Bl2oLIl1awpnenXU//722LAQ 8JExaw7jR+vC9TyifyBA/ng8sJ87t7b37ykCu8xFWt24f0okGZcQbo2GFB8QAWcRXb hysuM2OlpQhwbWAQEH9GUDz/8v1fcgJ51HkbcvsA7C47wkJcaqIZutS2Nu9WPxI0Kj aI43L5ZT+zyPVvcx6ufR2x75e3X0TwFz52dWy9kjcozyTPg7XCbl7QazgclVpk6rRu MQL0doHMyussoB9I/RFG9LiYx5NoGiggqQ3nc542MghmJl7kUZ2K90wbKZqTjJpRHa zSlnawmoY8v3Q== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 14/20] mm/damon/sysfs-schemes: support PSI-based quota auto-tune Date: Mon, 19 Feb 2024 11:44:25 -0800 Message-Id: <20240219194431.159606-15-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: 8bit Extend DAMON sysfs interface to support the PSI-based quota auto-tuning by adding a new file, 'target_metric' under the quota goal directory. Old users don't get any behavioral changes since the default value of the metric is 'user input'. Signed-off-by: SeongJae Park --- mm/damon/sysfs-schemes.c | 42 ++++++++++++++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 7a8a39f2679b..53a90ac678fb 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -826,15 +826,48 @@ static const struct kobj_type damon_sysfs_watermarks_ktype = { struct damos_sysfs_quota_goal { struct kobject kobj; + enum damos_quota_goal_metric metric; unsigned long target_value; unsigned long current_value; }; +/* This should match with enum damos_action */ +static const char * const damos_sysfs_quota_goal_metric_strs[] = { + "user_input", + "some_mem_psi_us", +}; + static struct damos_sysfs_quota_goal *damos_sysfs_quota_goal_alloc(void) { return kzalloc(sizeof(struct damos_sysfs_quota_goal), GFP_KERNEL); } +static ssize_t target_metric_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damos_sysfs_quota_goal *goal = container_of(kobj, + struct damos_sysfs_quota_goal, kobj); + + return sysfs_emit(buf, "%s\n", + damos_sysfs_quota_goal_metric_strs[goal->metric]); +} + +static ssize_t target_metric_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damos_sysfs_quota_goal *goal = container_of(kobj, + struct damos_sysfs_quota_goal, kobj); + enum damos_quota_goal_metric m; + + for (m = 0; m < NR_DAMOS_QUOTA_GOAL_METRICS; m++) { + if (sysfs_streq(buf, damos_sysfs_quota_goal_metric_strs[m])) { + goal->metric = m; + return count; + } + } + return -EINVAL; +} + static ssize_t target_value_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { @@ -880,6 +913,9 @@ static void damos_sysfs_quota_goal_release(struct kobject *kobj) kfree(container_of(kobj, struct damos_sysfs_quota_goal, kobj)); } +static struct kobj_attribute damos_sysfs_quota_goal_target_metric_attr = + __ATTR_RW_MODE(target_metric, 0600); + static struct kobj_attribute damos_sysfs_quota_goal_target_value_attr = __ATTR_RW_MODE(target_value, 0600); @@ -887,6 +923,7 @@ static struct kobj_attribute damos_sysfs_quota_goal_current_value_attr = __ATTR_RW_MODE(current_value, 0600); static struct attribute *damos_sysfs_quota_goal_attrs[] = { + &damos_sysfs_quota_goal_target_metric_attr.attr, &damos_sysfs_quota_goal_target_value_attr.attr, &damos_sysfs_quota_goal_current_value_attr.attr, NULL, @@ -1899,11 +1936,12 @@ static int damos_sysfs_set_quota_score( if (!sysfs_goal->target_value) continue; - goal = damos_new_quota_goal(DAMOS_QUOTA_USER_INPUT, + goal = damos_new_quota_goal(sysfs_goal->metric, sysfs_goal->target_value); if (!goal) return -ENOMEM; - goal->current_value = sysfs_goal->current_value; + if (sysfs_goal->metric == DAMOS_QUOTA_USER_INPUT) + goal->current_value = sysfs_goal->current_value; damos_add_quota_goal(quota, goal); } return 0; -- 2.39.2