diff options
| author | SeongJae Park <sj@kernel.org> | 2026-05-18 16:41:04 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-05-28 21:31:14 -0700 |
| commit | 02a858a6157ef019b7c80253d286dc6a1e687d7d (patch) | |
| tree | 19ada083b97fec8f6f096edfcc31cc97590e69b5 /mm | |
| parent | 3b41c52a428586642534c08fab57cd7b863c4f51 (diff) | |
| download | linux-next-history-02a858a6157ef019b7c80253d286dc6a1e687d7d.tar.gz | |
mm/damon/sysfs-schemes: implement probe dir
Implement sysfs directory for showing per-probe hits count of each region.
Link: https://lore.kernel.org/20260518234119.97569-17-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/damon/sysfs-schemes.c | 101 |
1 files changed, 95 insertions, 6 deletions
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 3b66c3a757b2a..7e21e78d77512 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -11,11 +11,39 @@ #include "sysfs-common.h" /* + * probe directory + */ + +struct damos_sysfs_probe { + struct kobject kobj; +}; + +static struct damos_sysfs_probe *damos_sysfs_probe_alloc(void) +{ + return kzalloc_obj(struct damos_sysfs_probe); +} + +static void damos_sysfs_probe_release(struct kobject *kobj) +{ + struct damos_sysfs_probe *probe = container_of(kobj, + struct damos_sysfs_probe, kobj); + + kfree(probe); +} + +static const struct kobj_type damos_sysfs_probe_ktype = { + .release = damos_sysfs_probe_release, + .sysfs_ops = &kobj_sysfs_ops, +}; + +/* * probes directory */ struct damos_sysfs_probes { struct kobject kobj; + struct damos_sysfs_probe **probes_arr; + int nr; }; static struct damos_sysfs_probes *damos_sysfs_probes_alloc(void) @@ -23,6 +51,60 @@ static struct damos_sysfs_probes *damos_sysfs_probes_alloc(void) return kzalloc_obj(struct damos_sysfs_probes); } +static void damos_sysfs_probes_rm_dirs(struct damos_sysfs_probes *probes) +{ + struct damos_sysfs_probe **probes_arr = probes->probes_arr; + int i; + + for (i = 0; i < probes->nr; i++) + kobject_put(&probes_arr[i]->kobj); + probes->nr = 0; + kfree(probes_arr); + probes->probes_arr = NULL; +} + +static int damos_sysfs_probes_add_dirs(struct damos_sysfs_probes *probes, + struct damon_ctx *ctx) +{ + struct damon_probe *probe; + struct damos_sysfs_probe **probes_arr; + int i = 0; + + damon_for_each_probe(probe, ctx) + i++; + + if (!i) + return 0; + + probes_arr = kmalloc_objs(*probes_arr, i); + if (!probes_arr) + return -ENOMEM; + probes->probes_arr = probes_arr; + + i = 0; + damon_for_each_probe(probe, ctx) { + struct damos_sysfs_probe *sys_probe; + int err; + + sys_probe = damos_sysfs_probe_alloc(); + if (!sys_probe) { + damos_sysfs_probes_rm_dirs(probes); + return -ENOMEM; + } + err = kobject_init_and_add(&sys_probe->kobj, + &damos_sysfs_probe_ktype, &probes->kobj, "%d", + i); + if (err) { + kobject_put(&sys_probe->kobj); + damos_sysfs_probes_rm_dirs(probes); + return err; + } + probes_arr[i++] = sys_probe; + probes->nr++; + } + return 0; +} + static void damos_sysfs_probes_release(struct kobject *kobj) { struct damos_sysfs_probes *probes = container_of(kobj, @@ -67,7 +149,8 @@ static struct damon_sysfs_scheme_region *damon_sysfs_scheme_region_alloc( } static int damos_sysfs_region_add_dirs( - struct damon_sysfs_scheme_region *region) + struct damon_sysfs_scheme_region *region, + struct damon_ctx *ctx) { struct damos_sysfs_probes *probes = damos_sysfs_probes_alloc(); int err; @@ -76,18 +159,24 @@ static int damos_sysfs_region_add_dirs( return -ENOMEM; err = kobject_init_and_add(&probes->kobj, &damos_sysfs_probes_ktype, ®ion->kobj, "probes"); - if (err) { - kobject_put(&probes->kobj); - return err; - } + if (err) + goto fail; + err = damos_sysfs_probes_add_dirs(probes, ctx); + if (err) + goto fail; region->probes = probes; return 0; + +fail: + kobject_put(&probes->kobj); + return err; } static void damos_sysfs_region_rm_dirs( struct damon_sysfs_scheme_region *region) { + damos_sysfs_probes_rm_dirs(region->probes); kobject_put(®ion->probes->kobj); } @@ -3051,7 +3140,7 @@ void damos_sysfs_populate_region_dir(struct damon_sysfs_schemes *sysfs_schemes, &sysfs_regions->kobj, "%d", sysfs_regions->nr_regions)) goto out; - if (damos_sysfs_region_add_dirs(region)) + if (damos_sysfs_region_add_dirs(region, ctx)) goto out; list_add_tail(®ion->list, &sysfs_regions->regions_list); |