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b=eRj3FgSGn0QTuJ4QtADEn6UIsfBkFbNKw1QGeKV170zq2UZZUtpuMFxtI7Bu6gB+j duhpkUPWlGHjjibjtIaZqpwvh8i8J0TGl0mcFno0V1HQNdTxh2xCGvPAAtGj1wl05Y pwYj14brGvx13Fikk2FvZ4uj2nw8lTXWm8+FukXlrqsKTvS7psYO1OY8gHvCebp0F9 um0MZTICJlSEovyZJ+0LicqDLejx0BGzLZjh0XXXEaFClDBSYFXD8BDA8WeZA0XnE3 fr9DNSYyITyMGpUIHh9LmyGnLnBIUkfOy1f99wZrsR12Eqr/qVpk2Sdej8Tb+EVvw8 EUbVDg4/KY1ww== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 15/28] mm/damon/sysfs-schemes: implement tried_regions//probes/ Date: Mon, 18 May 2026 16:41:03 -0700 Message-ID: <20260518234119.97569-16-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-Rspam-User: X-Rspamd-Queue-Id: D01281C000D X-Rspamd-Server: rspam04 X-Stat-Signature: txjeba17ea5y431ra8gytrxmihz57rkd X-HE-Tag: 1779147689-47640 X-HE-Meta: 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 6FMjQyr6 apeo8EFXgHQUGq3v1knXtAZqmJ5Jacxd/PyPaYQ+3Xh/ILNBC4OnEXDJ5tycl9ZTY3gsNqP7kABWcdpiPtcLgRUiKxcpuekE3+445+BWA1zpehAvwMWdr1pl/4u7My0eIKudoRAmxF6tJef/LbOzbd5xIokrSAvFCl+f2y/KE+p36U0Ih5+u4dtpPFo0DzATt3MhY6gVJA/pi/tN59SW76CGwraf9J8wCJZ2lwFW9tfwrkHt1fooV60JWdPWjmw/2j66aArsfX4+UiX/mQRz7RfaMcg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement a sysfs directory for showing the per-region probe hit counts. It is named 'probes/' and located under the DAMOS tried region directory. Signed-off-by: SeongJae Park --- mm/damon/sysfs-schemes.c | 67 +++++++++++++++++++++++++++++++++++++--- 1 file changed, 63 insertions(+), 4 deletions(-) diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 0d3021db0b99b..3b66c3a757b2a 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -10,6 +10,32 @@ #include "sysfs-common.h" +/* + * probes directory + */ + +struct damos_sysfs_probes { + struct kobject kobj; +}; + +static struct damos_sysfs_probes *damos_sysfs_probes_alloc(void) +{ + return kzalloc_obj(struct damos_sysfs_probes); +} + +static void damos_sysfs_probes_release(struct kobject *kobj) +{ + struct damos_sysfs_probes *probes = container_of(kobj, + struct damos_sysfs_probes, kobj); + + kfree(probes); +} + +static const struct kobj_type damos_sysfs_probes_ktype = { + .release = damos_sysfs_probes_release, + .sysfs_ops = &kobj_sysfs_ops, +}; + /* * scheme region directory */ @@ -20,6 +46,7 @@ struct damon_sysfs_scheme_region { unsigned int nr_accesses; unsigned int age; unsigned long sz_filter_passed; + struct damos_sysfs_probes *probes; struct list_head list; }; @@ -34,10 +61,36 @@ static struct damon_sysfs_scheme_region *damon_sysfs_scheme_region_alloc( sysfs_region->ar = region->ar; sysfs_region->nr_accesses = region->nr_accesses_bp / 10000; sysfs_region->age = region->age; + sysfs_region->probes = NULL; INIT_LIST_HEAD(&sysfs_region->list); return sysfs_region; } +static int damos_sysfs_region_add_dirs( + struct damon_sysfs_scheme_region *region) +{ + struct damos_sysfs_probes *probes = damos_sysfs_probes_alloc(); + int err; + + if (!probes) + return -ENOMEM; + err = kobject_init_and_add(&probes->kobj, &damos_sysfs_probes_ktype, + ®ion->kobj, "probes"); + if (err) { + kobject_put(&probes->kobj); + return err; + } + + region->probes = probes; + return 0; +} + +static void damos_sysfs_region_rm_dirs( + struct damon_sysfs_scheme_region *region) +{ + kobject_put(®ion->probes->kobj); +} + static ssize_t start_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { @@ -163,6 +216,7 @@ static void damon_sysfs_scheme_regions_rm_dirs( struct damon_sysfs_scheme_region *r, *next; list_for_each_entry_safe(r, next, ®ions->regions_list, list) { + damos_sysfs_region_rm_dirs(r); list_del(&r->list); kobject_put(&r->kobj); regions->nr_regions--; @@ -2995,12 +3049,17 @@ void damos_sysfs_populate_region_dir(struct damon_sysfs_schemes *sysfs_schemes, if (kobject_init_and_add(®ion->kobj, &damon_sysfs_scheme_region_ktype, &sysfs_regions->kobj, "%d", - sysfs_regions->nr_regions)) { - kobject_put(®ion->kobj); - return; - } + sysfs_regions->nr_regions)) + goto out; + if (damos_sysfs_region_add_dirs(region)) + goto out; + list_add_tail(®ion->list, &sysfs_regions->regions_list); sysfs_regions->nr_regions++; + return; + +out: + kobject_put(®ion->kobj); } int damon_sysfs_schemes_clear_regions( -- 2.47.3