From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794774545; b=nApIS1wbuDrAh4R1dWjWEeoAWwgqSBsgdI+4wgvSykZ3SfOnDCJRCnHwuZHaU0Nn4aT+ q6wFhNps2eTpEO/V44XCEW4T9PMO2z549RrhPvSTBPXeZOypsWL1H57048iO6soZ2jzHo CS7xviFBl4UpOmmnZJlkZD2Db7Axw89RrnaopKEvDHGgB645bHFKc2i3Qv2S8Twr4RaOq zKfbSmkG1Wwl35ruL5v22QaUcXgHNONGWolEOa+NKF3i5jHqVflzhgdz1WP9jX+wnNXXe D8VX7QT+VAhXXIPPn9bt6awtSa67xu2+PsJlUOsgvpl5ADkYfquSgmDHvGTpGgOWMjQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794774545; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=kHhnYqoQe1EhM4f5cyc2l4mme4lRuHhy4MnQ2nEOlUo=; b=C7OSVlJBIHr0wu27AtkVFiDZtt50bsLlSBscTYtDIU2O0kj+3nmuy1NV6z5bM4qgvsiL IyadW0hsJLRPKEOfxItAgm2wWf1v7zR7Zjiq8W7OVikA1d+TOKAVVvbO9SVh073976/0X v+IrDAvJofvLyc6RfHXPQhQd2G2yxAEdQwAvdI6WdR2yzgrs0USbzhdckJnPxf6g0IX6e cC0/0rNOpJOxeMX46yw17cu+SE557Hdf9Kz7L6hoRIwq9zRPLfeVH2U+Et0DpUJLCxdvo v6HnyR7b8Tm/OsYHQ3S9CXUzQuyYYgTEzJ7Lbq6smy6yeXQJIMfmGYNjmOvBcuniMvQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=F15rwd+e; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3CD24606A33E; Sun, 15 Nov 2026 20:29:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=F15rwd+e Received: by smtp.kernel.org (Postfix) with ESMTPSA id E64D91F000C5; Sun, 15 Nov 2026 20:29:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794774545; bh=kHhnYqoQe1EhM4f5cyc2l4mme4lRuHhy4MnQ2nEOlUo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=F15rwd+eNBmEdxKDvcq79WoITIDzqtjdcCDeOwCKWxl2vA+qUQRLN2PyoBkxx2Ew/ kxUdqtSObKxnO2ciG89vsMy4ZqqUDl4fEET9UBKjUHmwBKnCQXrsqtoqYuloliNqtf lFqKOqRGOgvktbb1nxnyg6mypGimnQZ44268AzS7tweaGlifbWVWxh9a2a51VgxoCX QHbB9rydPYKIulC388SnyrTBwC9lRqEbCxnIRBq8vhPAG+qnT0zjbrRmsBfnwUaYtH +b4jSYU60s1yp0XY+SVhr/GIrESqU8HGBryAdZKVz7nGQFvYqtRkz70l3jqDN+TMzm NrmqOJbo8VdWA== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 08/27] mm/damon/sysfs: implement report producer type and state files Date: Sun, 15 Nov 2026 12:28:26 -0800 Message-ID: <20261115202849.99134-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261115202849.99134-1-sj@kernel.org> References: <20261115202849.99134-1-sj@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement report_type and producer_state files under the report producer directory. The type file receives the type of the reports that the producer will generate and submit to DAMON. The producer_state file enables and disables the producer. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 7c6bc30c12125..7cdbe2fedf7d8 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -2983,6 +2983,8 @@ static const struct kobj_type damon_sysfs_kdamonds_ktype = { struct damon_sysfs_producer { struct kobject kobj; + enum damon_report_type report_type; + bool enabled; }; static struct damon_sysfs_producer *damon_sysfs_producer_alloc(void) @@ -2990,6 +2992,77 @@ static struct damon_sysfs_producer *damon_sysfs_producer_alloc(void) return kzalloc_obj(struct damon_sysfs_producer); } +struct damon_sysfs_report_type_name { + enum damon_report_type type; + char *name; +}; + +static const struct damon_sysfs_report_type_name +damon_sysfs_report_type_names[] = { +}; + +static ssize_t report_type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_producer *producer = container_of(kobj, + struct damon_sysfs_producer, kobj); + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_report_type_names); i++) { + const struct damon_sysfs_report_type_name *type_name; + + type_name = &damon_sysfs_report_type_names[i]; + if (type_name->type == producer->report_type) + return sysfs_emit(buf, "%s\n", type_name->name); + } + return -EINVAL; +} + +static ssize_t report_type_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_producer *producer = container_of(kobj, + struct damon_sysfs_producer, kobj); + ssize_t ret = -EINVAL; + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_report_type_names); i++) { + const struct damon_sysfs_report_type_name *type_name; + + type_name = &damon_sysfs_report_type_names[i]; + if (sysfs_streq(buf, type_name->name)) { + producer->report_type = type_name->type; + ret = count; + break; + } + } + return ret; +} + +static ssize_t producer_state_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_producer *producer = container_of(kobj, + struct damon_sysfs_producer, kobj); + + return sysfs_emit(buf, "%s\n", producer->enabled ? "on" : "off"); +} + +static ssize_t producer_state_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_producer *producer = container_of(kobj, + struct damon_sysfs_producer, kobj); + + if (sysfs_streq(buf, "on")) + producer->enabled = true; + else if (sysfs_streq(buf, "off")) + producer->enabled = false; + else + return -EINVAL; + return count; +} + static void damon_sysfs_producer_release(struct kobject *kobj) { struct damon_sysfs_producer *producer = container_of(kobj, @@ -2997,7 +3070,14 @@ static void damon_sysfs_producer_release(struct kobject *kobj) kfree(producer); } +static struct kobj_attribute damon_sysfs_producer_report_type_attr = + __ATTR_RW_MODE(report_type, 0600); +static struct kobj_attribute damon_sysfs_producer_producer_state_type_attr = + __ATTR_RW_MODE(producer_state, 0600); + static struct attribute *damon_sysfs_producer_attrs[] = { + &damon_sysfs_producer_report_type_attr.attr, + &damon_sysfs_producer_producer_state_type_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_producer); -- 2.47.3