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b=hGYojE+shBdtvikrnxOfsrT13b1eW4VMwiFxQ17DjbE9RTrpRNiUYBW/ItmCHLxZf 8vbHrJ9JMniWgT88pKw9bErJFBu0oR+x6KbKek2PUZD23r6BC4YgY/N9t6IQYISKk8 TLomoYIVsPz4nVsw+I7+7arQ2y8l2/MLM/kuQpflJbNYy8C+4tvLcQTViY+eu5p8yK rSCVpCHjQ0M6j0TAUGtN+8OTQihDSO7/JZj1wyol/PgcT8nUoP3ZrzGoXixLtzJwFX IJcnqNWrKShJLSqFfuUIVNcIDcJM+l3acjpfqXcEiRoExOieJwDhOZRhI05caqF+ZN v7O8gBKKB6rLw== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v3 09/28] mm/damon/sysfs: implement probes dir Date: Sat, 16 May 2026 11:36:50 -0700 Message-ID: <20260516183712.81393-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260516183712.81393-1-sj@kernel.org> References: <20260516183712.81393-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: BA11F40011 X-Stat-Signature: x8n6wj4qduo5ctzupx8kjfgagk7g8715 X-HE-Tag: 1778956648-915225 X-HE-Meta: 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 aXoOOzQt /kcNu+D0oZZalN+cUACxwbiitPbnqLueh65MUTbNE/CdjqoGxzPMw1qVzDKGi/HnFqIhbysoKDEfYjT0z1coXYa6BFQWsFs88iVXvySOmVG5omWL6XgMWgNO65ISKVQZDmWCeGaC4d4hfacbKQfaKQXXaKpAGhEWvkCYZhgS6oqHyoD7kM+dW4SKfp7lPTA0Zsf6J9U8Gdnt64LEE0yqpAltVZ8dKf+MgdrpsujaTuCHUVqM= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement sysfs directory that can be used by the users to install data probes. Signed-off-by: SeongJae Park --- mm/damon/sysfs.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index eefa959aa30ae..5f3b253f50ebf 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -747,6 +747,35 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { .default_groups = damon_sysfs_intervals_groups, }; +/* + * probes directory + */ + +struct damon_sysfs_probes { + struct kobject kobj; +}; + +static struct damon_sysfs_probes *damon_sysfs_probes_alloc(void) +{ + return kzalloc_obj(struct damon_sysfs_probes); +} + +static void damon_sysfs_probes_release(struct kobject *kobj) +{ + kfree(container_of(kobj, struct damon_sysfs_probes, kobj)); +} + +static struct attribute *damon_sysfs_probes_attrs[] = { + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_probes); + +static const struct kobj_type damon_sysfs_probes_ktype = { + .release = damon_sysfs_probes_release, + .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damon_sysfs_probes_groups, +}; + /* * monitoring_attrs directory */ @@ -755,6 +784,7 @@ struct damon_sysfs_attrs { struct kobject kobj; struct damon_sysfs_intervals *intervals; struct damon_sysfs_ul_range *nr_regions_range; + struct damon_sysfs_probes *probes; }; static struct damon_sysfs_attrs *damon_sysfs_attrs_alloc(void) @@ -771,6 +801,7 @@ static int damon_sysfs_attrs_add_dirs(struct damon_sysfs_attrs *attrs) { struct damon_sysfs_intervals *intervals; struct damon_sysfs_ul_range *nr_regions_range; + struct damon_sysfs_probes *probes; int err; intervals = damon_sysfs_intervals_alloc(5000, 100000, 60000000); @@ -799,8 +830,22 @@ static int damon_sysfs_attrs_add_dirs(struct damon_sysfs_attrs *attrs) if (err) goto put_nr_regions_intervals_out; attrs->nr_regions_range = nr_regions_range; + + probes = damon_sysfs_probes_alloc(); + if (!probes) { + err = -ENOMEM; + goto put_nr_regions_intervals_out; + } + err = kobject_init_and_add(&probes->kobj, + &damon_sysfs_probes_ktype, &attrs->kobj, "probes"); + if (err) + goto put_probes_out; + attrs->probes = probes; return 0; +put_probes_out: + kobject_put(&probes->kobj); + attrs->probes = NULL; put_nr_regions_intervals_out: kobject_put(&nr_regions_range->kobj); attrs->nr_regions_range = NULL; @@ -817,6 +862,7 @@ static void damon_sysfs_attrs_rm_dirs(struct damon_sysfs_attrs *attrs) kobject_put(&attrs->nr_regions_range->kobj); damon_sysfs_intervals_rm_dirs(attrs->intervals); kobject_put(&attrs->intervals->kobj); + kobject_put(&attrs->probes->kobj); } static void damon_sysfs_attrs_release(struct kobject *kobj) -- 2.47.3