From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 00F144314AC; Mon, 6 Jul 2026 14:19:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783347567; cv=none; b=KvNyvYqIrCN0CF87sYpN0VTY7xjAU5CQJ7NiSBeErbRjmXIht0CTy/oEhT1ihxMox+gcAbtkkGWG+E2xl9cIEAIXLP12ILSJl0JiJa/pZsaakj7DHA2jkgDIUMTJNH89zex56QYPTF/Mxh7D3U4lo4zb1subV1eK+JdCqW3Prnk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783347567; c=relaxed/simple; bh=1qK22Wmyg+VPePlHBItbL0HDLucjvkb0yd+RYmjadoI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=btKqLtLsV58ZhoXiOanugesDyTtqoZQ+qKNpl7AidlUD05vyWXKNNN2olrGQdurVrfb5yRQd9MH8Avj/bhttfnKtKTO3X6B0UGIBXTKSB+JEGikfmiUARNyib9Bf8YPmXVGZocHO2RqzMzV06i27T8vouLI1zT3MZrxqfAwiC24= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lCFQU98w; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lCFQU98w" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F8101F000E9; Mon, 6 Jul 2026 14:19:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783347564; bh=yJOHjYArtxH1+/qkwlfdh08BuCLZ4ONkiqi8cM2xmzA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=lCFQU98whh3Z83+9WS/sIOLJTtgnuUq+PXZYs5xCChKyY/Eqs6kxZmUqLRXSf2eK6 eN6urGj6dYEJS2/ncuE1JfATWN3U97Oeqeue+GZlcinVbTMFJiG4KNMXNoWR7c88M5 joOd3LCCjYi1j8iohJdvPShDaItsQ9k0PBYhX2HGFCo3XbUPm8yfyKSmw98Nd6gZvd 6xoPlgXgSV6iFf83o12lFUnz1dLKIcJmz8jZ1S/U2qFnzIYMmh3MbccCIAbfl6FBHu bDfRhUpFxARcwbA39yy9UL4JJTRt4pkTnUiPzbHjyHOPMQs7dmUcYQed6LDHgBdUy3 B1M701CGBv4+Q== 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 v1.1 13/16] mm/damon/sysfs: implement probe/weight file Date: Mon, 6 Jul 2026 07:19:07 -0700 Message-ID: <20260706141912.88445-14-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260706141912.88445-1-sj@kernel.org> References: <20260706141912.88445-1-sj@kernel.org> Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement a new sysfs file, 'weight', under probe directory. Users will be able to set the probe weight and enable the attributes only monitoring using it. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 6d7e36c9e509d..b5fe036f78015 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -1065,6 +1065,7 @@ static const struct kobj_type damon_sysfs_filters_ktype = { struct damon_sysfs_probe { struct kobject kobj; + unsigned int weight; struct damon_sysfs_filters *filters; }; @@ -1100,12 +1101,35 @@ static void damon_sysfs_probe_rm_dirs(struct damon_sysfs_probe *probe) } } +static ssize_t weight_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct damon_sysfs_probe *probe = container_of(kobj, + struct damon_sysfs_probe, kobj); + + return sysfs_emit(buf, "%u\n", probe->weight); +} + +static ssize_t weight_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_probe *probe = container_of(kobj, + struct damon_sysfs_probe, kobj); + int err = kstrtouint(buf, 0, &probe->weight); + + return err ? err : count; +} + static void damon_sysfs_probe_release(struct kobject *kobj) { kfree(container_of(kobj, struct damon_sysfs_probe, kobj)); } +static struct kobj_attribute damon_sysfs_probe_weight_attr = + __ATTR_RW_MODE(weight, 0600); + static struct attribute *damon_sysfs_probe_attrs[] = { + &damon_sysfs_probe_weight_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_probe); @@ -1965,6 +1989,7 @@ static int damon_sysfs_set_probes(struct damon_ctx *ctx, return -ENOMEM; damon_add_probe(ctx, p); sys_probe = sys_probes->probes_arr[i]; + p->weight = sys_probe->weight; err = damon_sysfs_set_probe(p, sys_probe); if (err) return err; -- 2.47.3