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b=I8zVs/ck7Bg7BtG7kEZLqI6rs0Oo0A07j0/cTzcoDGXKtRDkOl0ob3zWdfbg64CLE hKwnZLNo1No2WgaUCsvI6qV8Gmah6VCi7U3Jhf35LrKleChJySgl2u9v7TRARtbdag nnmV92+xmHF6+0XJJ9KVoYXEnKjjeeV1RpO7TyzdqRiQiIQDcPXH05MHX1M7tKuq7E Xp4URpN6fGNvcmAJJw0TYWRxNbBsa01ytMeJbuBzBA6qZt89cvkkdMV9dzDbV2x3AE S8YSGM0f3cA7NFjYormjyTFwpCzsotikv9Jvb9b2Ky51AP8NkUDbCuIlaQJoS4lKdI +IGtNzzQaDgmA== 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 v2.2 09/28] mm/damon/sysfs: implement probes dir Date: Thu, 14 May 2026 17:44:10 -0700 Message-ID: <20260515004433.128933-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260515004433.128933-1-sj@kernel.org> References: <20260515004433.128933-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 4258E40004 X-Stat-Signature: r4tp3f7m61xdgx31i5pz9ns3c6i1whr4 X-Rspam-User: X-HE-Tag: 1778805890-913789 X-HE-Meta: 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 EvZtEhOe zlHQcQ/1xieEiffCYB1NOvLSbMDqDqUEOO4WQZR1PWEZ0uasJHDIkshVYbX1iqIGfzkg7F07yXvXNfkKcyszmY6B3lIqFC28VyYTsVM7lSur3nXIGq4Mof5Dt0jPjAjy12qVwdIXxiQkGc0LRi9Ubf6851cWEtItoNmp1LuxjXm5QkFzwZAc1876+8jL4Wk0Z+U2R35wWfIJq/6xrVsSGxgNe7nMuigSgYkRa 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