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b=VX9GHMPjitYbgUhbD/eOt0yomF/5zLP6SWMvxfHtW0JGPH746SuoFNYGBrDz4lyxT Kga7TpJYKyWu/7LQUo1wg0bN2sNSYJrHEqxF/DU3iYzasJM7t1jv3TiWp8GOtUdWt+ 1r2QSeei00367QX6veNOZzaX7U5NdDI/AkcznfwKnedgUvXacjuWgyHo6Cj5Yj+IO3 y9UBnpl4mkWOe55YEyavsEjXeUOhY/U1Fv2wS8RWIwRBGAfcEMsHWcxm8PXrkNWqHd IioLQheZphLpXPxRvD4/DNUA/bkUBMsMlp1SSQKG1v8sw/OGVTVgnaDjfzwblbh2R/ F8oeo7BD4HFQg== 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 13/16] mm/damon/sysfs: implement probe/weight file Date: Sun, 5 Jul 2026 13:57:35 -0700 Message-ID: <20260705205743.98656-14-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260705205743.98656-1-sj@kernel.org> References: <20260705205743.98656-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 85F26C0003 X-Stat-Signature: df1ctchqkyi3dddi3f35fogq59ktsfyh X-HE-Tag: 1783285079-543597 X-HE-Meta: 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 6yy0tzMr pKwqfp5+ORVAs8UQzPWuNj94z1Vk4P3e3l9oJLxjJHukWJttdT/UwrJq7eCjYkCpjLSSkBhketr+SDzmEWn6/Z1YGxlUe34x23ThKFO4Cyn9DZG99fIHrgPn3390Y/Z8E7rFzVtfH3Wp3MD4SYzIek96On9maKo1PoZy5eP7+7Vrthq2Q2sN12WnuDTsePjJMB9yxoX1KfBzgvUzh0lYYhUq4iMHIAbSmqtlqjM7UycpWKKw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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