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b=ok4/X9zrJPY6LPSYJUCoK93OZvdhLSXsy7mPxMMB4K2c7cRQ0IuvUNKw/Vbr6cuTQ GGkNEW6AL1+4ZbpBIOk/d2/QMqrB2ocmnC8K9PuRvCM7J91yUiYFecvTrlyaIyJG3x 7dgrn0c3gGAQIfmVLQft+ZhvNKKNTl9Mi3AB2hoqRtEwqVAgiQYjPuoGPhBI9d7xf9 pnL+xZ4kY0Jbh2ni5f4T36uxHYBbwTwEUlnO7M0VwhXFMAJG/qOBBTjgMv0WKydYAJ N5NzwGytky/w1QT08ya/feMA5Jg9Tq/4fP4b1inLHruKu9JNcTxrfPUF1ekLZUBlOh HzkiAbBo8k2Ag== 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 v3 4/8] mm/damon/sysfs: add min,max files under probe filter directory Date: Mon, 14 Sep 2026 19:09:23 -0700 Message-ID: <20260915020929.102953-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260915020929.102953-1-sj@kernel.org> References: <20260915020929.102953-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 3E0B720004 X-Stat-Signature: t4mdrah7yxfwzdhbp7z7rn4p8ubc88yx X-Rspam-User: X-HE-Tag: 1789438180-355178 X-HE-Meta: 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 dGfF6olG OsKkWSZpFdGXEZS4HAm7x3yAflEuQUiBUnCRNLOwUqNiSdkmMNHtRtxHqjf305/Yb1kz2wIX522isT+OOzy8sB2ZSZf/2pt0CLGMEJWvZi6ZBDy0qP4C+Te5BKUQGfZo4PZRhYUORMWmhdT39kLwXSk+J3mkMp5VxoK7gKu5LBAejpF9eBCofTqkNzQj+tf0uEBT+LCTldXPZsruEAoctqISlvRMyr9Bo4WqRGnIHvUnuV2g= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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