diff options
| author | SeongJae Park <sj@kernel.org> | 2026-05-18 16:41:05 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-05-28 21:31:14 -0700 |
| commit | e806fd5be7f1083acbfc067999ed54184da0ac22 (patch) | |
| tree | f270cbf7a2aed22b359560a6500ff3182559319f /mm | |
| parent | 02a858a6157ef019b7c80253d286dc6a1e687d7d (diff) | |
| download | linux-next-history-e806fd5be7f1083acbfc067999ed54184da0ac22.tar.gz | |
mm/damon/sysfs-schemes: implement probe/hits file
Implement sysfs file for showing the per-region per-probe hits count.
Link: https://lore.kernel.org/20260518234119.97569-18-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 | 41 |
1 files changed, 34 insertions, 7 deletions
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 7e21e78d77512..e25f4824b72fd 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -16,11 +16,27 @@ struct damos_sysfs_probe { struct kobject kobj; + unsigned char hits; }; -static struct damos_sysfs_probe *damos_sysfs_probe_alloc(void) +static struct damos_sysfs_probe *damos_sysfs_probe_alloc(unsigned char hits) { - return kzalloc_obj(struct damos_sysfs_probe); + struct damos_sysfs_probe *probe; + + probe = kzalloc_obj(*probe); + if (!probe) + return NULL; + probe->hits = hits; + return probe; +} + +static ssize_t hits_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct damos_sysfs_probe *probe = container_of(kobj, + struct damos_sysfs_probe, kobj); + + return sysfs_emit(buf, "%hhu\n", probe->hits); } static void damos_sysfs_probe_release(struct kobject *kobj) @@ -31,9 +47,19 @@ static void damos_sysfs_probe_release(struct kobject *kobj) kfree(probe); } +static struct kobj_attribute damos_sysfs_probe_hits_attr = + __ATTR_RO_MODE(hits, 0400); + +static struct attribute *damos_sysfs_probe_attrs[] = { + &damos_sysfs_probe_hits_attr.attr, + NULL, +}; +ATTRIBUTE_GROUPS(damos_sysfs_probe); + static const struct kobj_type damos_sysfs_probe_ktype = { .release = damos_sysfs_probe_release, .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damos_sysfs_probe_groups, }; /* @@ -64,7 +90,7 @@ static void damos_sysfs_probes_rm_dirs(struct damos_sysfs_probes *probes) } static int damos_sysfs_probes_add_dirs(struct damos_sysfs_probes *probes, - struct damon_ctx *ctx) + struct damon_ctx *ctx, struct damon_region *region) { struct damon_probe *probe; struct damos_sysfs_probe **probes_arr; @@ -86,7 +112,7 @@ static int damos_sysfs_probes_add_dirs(struct damos_sysfs_probes *probes, struct damos_sysfs_probe *sys_probe; int err; - sys_probe = damos_sysfs_probe_alloc(); + sys_probe = damos_sysfs_probe_alloc(region->probe_hits[i]); if (!sys_probe) { damos_sysfs_probes_rm_dirs(probes); return -ENOMEM; @@ -150,7 +176,8 @@ 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_ctx *ctx) + struct damon_ctx *ctx, + struct damon_region *dregion) { struct damos_sysfs_probes *probes = damos_sysfs_probes_alloc(); int err; @@ -161,7 +188,7 @@ static int damos_sysfs_region_add_dirs( ®ion->kobj, "probes"); if (err) goto fail; - err = damos_sysfs_probes_add_dirs(probes, ctx); + err = damos_sysfs_probes_add_dirs(probes, ctx, dregion); if (err) goto fail; @@ -3140,7 +3167,7 @@ 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, ctx)) + if (damos_sysfs_region_add_dirs(region, ctx, r)) goto out; list_add_tail(®ion->list, &sysfs_regions->regions_list); |