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b=ueKhhBVwMR6jMZ/LjOfl2hzJDOZPBed2629Gzm+zgB5LaZGOehI0gdnBKtA0+zysQ 33ZS7ayJPnmmPZQzJjJwPO09V3faxejpoTHFXc7Rhdr4cl8wFI6QUHiHhJZmECpwN2 7PSx+FC8sheHDpSo5lVoW6ECe12Adv8nD2QaQHOU/qowWvqpJt9uB8Id4mjt/kMLGy /u6iekceO4NoCKCWW63K+wTdhxwzEjjLae0LyyrVKhxXKCndCrRpq3RORjrthiRfgD qoahDN5BJ9AXJh9A2m2948iD+gpr+7SEhd/vqMOvN9HnfpRQlWt3wSj1uuvrr4cDuB xMss2r93Zyp1w== 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 09/19] mm/damon/sysfs: implement probes dir Date: Sun, 26 Apr 2026 13:52:10 -0700 Message-ID: <20260426205222.93895-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260426205222.93895-1-sj@kernel.org> References: <20260426205222.93895-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 8F6754000B X-Stat-Signature: uzejcfbcztq5n9b6juwi5wgf6b188nyf X-Rspam-User: X-HE-Tag: 1777236758-544745 X-HE-Meta: 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 T7wwvpyn cqakL8V8UWx3vkbZzF03KwQpkv1rMg6/qPTOZ4xwrc3j1J/Lh0yd/P3qZzpthfCEvoCYaOG05vVAtwQByWeht9lDtRKZsHWmAxF5B1oZaBcrhurrvOMT0tbzMY2Ns5zCdmMcNo+3doCCs/ySlHXR6bXKIFDiUwJXHuq1sVPk0r/g8oWiRniKb0XOBsqm0kGIgyDkLAmcolXtprtUPni5rl/7ymnIloOLRLnciMfIgax36GLs= 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