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b=Sjf5pZe0cBh5aXrpjcORrXx6Zd8i8sFTWDQPNJeNj9Px/IoUTwdOzDRKar3U+wdBJ 14QVa7N8/vbm0uaB/PfvoMQxKgLOPhvcltWO/eftrGRi9cAp5d78xjj1UuQ8q6sJw5 R4+utRwuGK64K6aEaYxMnIkLbevWyeW7lGqldzFoZwgVlrgiEIXJub/XGQ4zn8t0Mc 4sNjlU418Q6tfjcAjPDEbzmpgmTQxvwbpyvTzl9wBefL9406dqwDLO4fwVufI4AVWZ 2V/XxZ8zMp19QiFp4elOPhc93T9VaR6Xvfu/m2MBCJdzPf5S9ycDTJccgItNvHoks9 nIIayvn7bjv8g== 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 v2.1 09/28] mm/damon/sysfs: implement probes dir Date: Thu, 14 May 2026 07:08:42 -0700 Message-ID: <20260514140904.119781-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260514140904.119781-1-sj@kernel.org> References: <20260514140904.119781-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: n4xtnre9ue6rczy5pafbicpcpkhysure X-Rspamd-Queue-Id: 6FF831C0014 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1778767762-152707 X-HE-Meta: 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 rXqs42Al 0mOQHIz2sY/AjdiqmIJSX53s4Qow4SToRF5D5Gf/UEHbliIR2oMfh2Zh33viEtKmXphopYjbam6+KDsnstfAPdT09dxtrLRJd2AL4FlvBvHLKoXrOTNfZjUG9RBYtCtHkNxbu9TeLnD5kWF/AiLeHZ4qu7IPR3ygaMSOPZ9nfDaIi9AcLURWG+1UMGpUB+XARRV1kiobj6Ovw2eb0N0I5jUQKXqPusVBhl8XZO4bNl19c9qU= 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 d5863cc33d230..ccd19fc062f31 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