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b=MS7nR5t2sK3dn3WFELBnQbMSl5v710rVTzQ9QYNt/Gje0Cq41caE7zg2z6zSDF4od G/F8ZIeSUqPMAyiLuCsGT/m/loqW4TQxFq0N05UjUBLGCsbauHKfxSRSeLB7gnZM+o UU3aavsIHZKJ8E0IFAXV0Vr1HnyHK2/Ywbju4iUe4QZ+srTCO5wmrO2f8Aqu5alcmA 4z7moXaTsmn/4kUdnJ1W0puO8ofGBA78ttcFziv9RSD5h0DD4XvaZtHT83DhfAfsdW 4qOmmabgVJ21Sv5IpdntekX/4/CtEYCw7Hbyk0a2OYKfKY89ijAAdZ2/SRhi1odUKt DIolL5YLS/hTg== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 4/8] mm/damon/sysfs: add min,max files under probe filter directory Date: Tue, 15 Sep 2026 07:33:53 -0700 Message-ID: <20260915143359.91472-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260915143359.91472-1-sj@kernel.org> References: <20260915143359.91472-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: p8994r19irptkogb8m3awqypqde677qp X-Rspamd-Queue-Id: 1DB2380008 X-Rspamd-Server: rspam07 X-HE-Tag: 1789482848-92678 X-HE-Meta: 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 ygunt8rn rs+qbhT2NEDDMjIA1nOzjs55HDPmJmZoaMRxUP1TH4kgJ2TZkgXK/e7TxXnaWgUQa279KMXBqd7L0C1gcEP1Hn9sm6DjYrS3uSu+n2pe2vDPHnOboqbMxI8wtQTkOixCsnMg2LWAVT+XmNz4pBXT8dnWWZ44L49lTaFk6hREjhy3Nbo1H46xaK6efKh2J7mnQ7taz/2pMHSZTjfyYKNdCWb8pZ7F5zGpG08FIzloqs2xywb3eUXTeREvJv85VVS4IS4xMzc7pGNSzK2QHL5oS4BzVcDKtsrMfEtvmkNBu2nb5+bLh3m4uczRhb1T+ysB+9s5X 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