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 888F137DAD5; Sun, 13 Sep 2026 17:11:43 +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=1789319504; cv=none; b=A1dxxwNocreNNzXz2JErkf6OXBW75A830o5vCd0741SiQsaVCzxdC9NeSj7wG4N3Ylt+8pmlWhPSb7bu6lmlDXq0BayBOkuy2gVYJ74p4Z5gtPGH0gh/fBV7zqSdg7pCm7yPaBAIVUYdKPfroIHKAW61HHPvuu1e7tAGLpYiS5I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789319504; c=relaxed/simple; bh=KW791MgCtRerwlblO2XlLUV0YVIRvjv/GWAiew+3j6k=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rB6SDlyKcQ1wd1Rav12X+Re6HTYDN+WDanxCGQQM69VeLFMIpCEydH/oFJU07hyzIVEdAtzTMqw1HDJIKYSdkVUlsC91SCxzw0as5yqcGqhJVVCB1dFTcAqjcC4wJVOdg0/QKbvBP3wzpeVMhe2kY13WJTXE/fkbv41kl7ZYgrE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GKMbsFDj; 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="GKMbsFDj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 395611F00899; Sun, 13 Sep 2026 17:11:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789319503; bh=g5VdpOGRYXrXyCrSePa8puxBW/6Uq97itYKIwT0a6WQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=GKMbsFDjsk0u/gctNgobRRhsNbFFlyhomMGdfqv5r6WhRQfy16vAkNgCzshYrdGic YwMbXcfhEwCEUOt2A6dyc1oSTb7Jew697SjPC9FFAVAIT7q6Bv0cDmV1nFQT+hu5TZ Ih0jq27BTVP25eEUy0I58dEiLrpB0iKpM0lnN9YZj2uoOI8CQ3TeLwA68erQ36KQzv KYxAbt38lh8r7In1fxT9VTMZ05hgjJE0affBtB9FHR9g4I0Q1+KgU79UbKOPwsd59g gyzWeGmkBBgMBcr4MH8WQunGxgryZsGqlW1sVaNoUl6c+STZBlGjrrx14Tqs3OJ7WU 7lpC0PxLUpocg== 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 4/8] mm/damon/sysfs: add min,max files under probe filter directory Date: Sun, 13 Sep 2026 10:11:26 -0700 Message-ID: <20260913171133.102366-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260913171133.102366-1-sj@kernel.org> References: <20260913171133.102366-1-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 In future, DAMON sysfs interface will support data attribute probe filter types that have range arguments like the newly added hugepage_size type filter. To prepare such supports, add two new DAMON sysfs files, min and max, under the probe filter directory. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 51fa506c879b0..8e8d89b8ed981 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -975,6 +975,8 @@ struct damon_sysfs_filter { bool matching; bool allow; char *path; + unsigned long range_min; + unsigned long range_max; }; static struct damon_sysfs_filter *damon_sysfs_filter_alloc(void) @@ -1127,6 +1129,44 @@ static ssize_t path_store(struct kobject *kobj, return count; } +static ssize_t min_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + + return sysfs_emit(buf, "%lu\n", filter->range_min); +} + +static ssize_t min_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + int err = kstrtoul(buf, 0, &filter->range_min); + + return err ? err : count; +} + +static ssize_t max_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + + return sysfs_emit(buf, "%lu\n", filter->range_max); +} + +static ssize_t max_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + int err = kstrtoul(buf, 0, &filter->range_max); + + return err ? err : count; +} + static void damon_sysfs_filter_release(struct kobject *kobj) { struct damon_sysfs_filter *filter = container_of(kobj, @@ -1148,11 +1188,19 @@ static struct kobj_attribute damon_sysfs_filter_allow_attr = static struct kobj_attribute damon_sysfs_filter_path_attr = __ATTR_RW_MODE(path, 0600); +static struct kobj_attribute damon_sysfs_filter_min_attr = + __ATTR_RW_MODE(min, 0600); + +static struct kobj_attribute damon_sysfs_filter_max_attr = + __ATTR_RW_MODE(max, 0600); + static struct attribute *damon_sysfs_filter_attrs[] = { &damon_sysfs_filter_type_attr.attr, &damon_sysfs_filter_matching_attr.attr, &damon_sysfs_filter_allow_attr.attr, &damon_sysfs_filter_path_attr.attr, + &damon_sysfs_filter_min_attr.attr, + &damon_sysfs_filter_max_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_filter); -- 2.47.3