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b=RuSV5quIhV0b64AbZG5woewKGNkdF5ETDSlswFfsQrXoh8vBrZC/rS1nhl7rIA/4u dlPVOA6B5zZ1OCWtsWKXx6dmQAQW2ef27EJCzmKdq2IrxwZaOARkO1prRsk+fd12bp ARTVjTAhqcafa5P14ZMMo6Pt0trdOb7C4OnX8sIxtVCca8nQMDiOLk3oxZI0n/hS2L 6Hc9OBqWBMKvCnAU3FDJVXLIjpHg9Sz4s6woapDq/141bGs1Cne8Y8SaHNM61DF7Gi 2xi+VYTj4xyuYxlBapN/PhX12FOyQNDvk7rt82N8BeMxo02EZeoWjaAxQ32QcnB/A/ PMHCeB/zhxIMA== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 09/28] mm/damon/sysfs: implement probes dir Date: Mon, 18 May 2026 16:40:57 -0700 Message-ID: <20260518234119.97569-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260518234119.97569-1-sj@kernel.org> References: <20260518234119.97569-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 3A7D716000B X-Stat-Signature: f45kcua4utm84qzhkypd7fee3q9iegzd X-Rspam-User: X-HE-Tag: 1779147688-337375 X-HE-Meta: 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 rkQUmbgU /sxPmnz5Ke6Q72bkTdkquF9HGu3TrrI/cjFeM5DE4TelWcetYlefUgL2ANNlev2LRrtgDrMfmUDRp4mWXXlsjNgvjMje+zuGsV17WjoBseP2nYZC7KmKDMEnPsgMtqa2ytzdstb/CW8UdkG1mwS7PLv89oncOPZKMhM5nflcEV3pw53SCgHzh6QTM8HIHpRMHBS9Jl7WYVDNx56AX2d1siwzG5BSGPaMeGgMLjqBsiQX3f2k= 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