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b=t6WNwwQvGd4KqutwoIYQ2sBnmm/3oYmk78Mtm6HYhHckxSakRl4ARm0b7uwRfd/Ko v8Uv67OlLLlrEflPV7ZJiJ1MV/BofNocP6xoPRfR/xmHvzc+Pb2WKh9cDJZdqPUVeJ SusGM1c1eAfrXbLfEuhrqUCBwDYI02hqlbrgipo3Rwp1MNoQUEfwZjY2xuTJsqBGm3 uuL5uJ2iruOrcbPQkz4WT5mikUeF2dg4jVkBQpcegkKtrBuw3SYsK1rM4f/HUG153h n/E7SG/EFG1trclw1lyF+JBTwXNLIo1fNV2IpFJwo5t0k6siz97SValGPt9HPLE4gs +McRVtnOb/Xjw== 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 09/28] mm/damon/sysfs: implement probes dir Date: Tue, 12 May 2026 07:36:24 -0700 Message-ID: <20260512143645.113201-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260512143645.113201-1-sj@kernel.org> References: <20260512143645.113201-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 0CD96A000F X-Stat-Signature: e4ja56zq5y4yaewh7yq4txrxtswzp1wk X-Rspam-User: X-HE-Tag: 1778596621-439629 X-HE-Meta: U2FsdGVkX19cZkIRhsqmAbRalcraZOxIWifAQDa/tutAmz1lGdKxXNR57Vk16FbBpyaW2pnevgv8NC4JxqELOKtOw4ciEFPBoUlni68sV9w20OeiS/zzAj7Ndc2LUwMM/myN9KQvVoDYmoWx4931blDVL+J02pChyXLl8FgIJu0ytCqWyrbkxlGgE/oiFNxaKCvIgppVWFsVFbMBDqCKTQwQPhBMybIk+SYo4pKr5Zt54q34P+Ht6hG9etSYIX/21dYPvOq68QAb+mcF3uhAIbemcETD66l5T8BtAEByXmipZy7amzLqtfRAd0peBc+GB5SbBMA5OqaP1hFGC8N/BeEPYv0/wpqfFdK5iCU0+SWAQV42IbIdCblQV+GtRPwjE/i5IZFRNDuutqKMFUt1Hwne9M8nQ2KQaIZN+mJD2HxSqxKCw/VLNEzEkGgx5rczNUtvJ3OZ/Ag7Y0MGS2qGRYvllvIxnchzUT0jEsi11Yla4KJ83QAij6SRCNjjS6KUM/v+K2OEVBzin9Og0MZK7vondSJKLd3LLRpKOWigTbzVl5dc+XB32TlttAjPSosJpbqJUzN9Y6AgFUoHvElCluVqAtkFFWbsmYrJxJe2cIInkZGaF3J1RN2ngwUVDxX+Qzy+vwIA9G4axs9Vani1ULULitiXVdr1H7Y2HKjhM8Age3PtbQ5t9Sz/yDMXZC2rPhxuttHNUCXnl4HMfVXd5GQl1j+v5DFuPNNhS/CraJ4pLgMmDxV/fviBNoMvxwtznzEBL1gabt2z/zi6IdxbEBuVrj8hINCTU6UJGb1ZVBwtaum9EoQzVb7YEOIhhfDi4h0WjFeV1F8+hyWlmNTUv/pXIObKhwVik8SPkhgiDTiTgHZc722SQlHVvcJ+qMaPLFthmyyPWq89dpxorcy2abJzn/lD/CJfwcpIiUUCjbxiNTDsqcWNAm9JKCcyTBWCPzG/fHZaWIUmCBSZnJU /Xb9jwv6 z2ljj0AUrYOK7r9iReQsXkSS9TInkkSC+ZfzIKIpGJ7L0C0mEQCqZojK8GbKxsXbGHUTrr5Ng924Lqve4spMRt7RUPz25NtIbXYn4jDyMry1fxTxVR46YmONLi01jlsGx157jHpHCvmbOQ6occAV+voIMNg4A7wlDDDe17zuVhjZaaJgQpVCW3M40hWx8DsgHiD213OVHR0+x4JawLplxN0uozHTdarXk6c/3sXD7tKwMYMU= 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