github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 17:47:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

mm/damon/sysfs-schemes: implement tried_regions/<r>/probes/

Browse Source 
Implement a sysfs directory for showing the per-region probe hit counts. 
It is named 'probes/' and located under the DAMOS tried region directory.

Link: https://lore.kernel.org/20260518234119.97569-16-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>
This commit is contained in:
SeongJae Park 2026-05-18 16:41:03 -07:00 committed by Andrew Morton
parent 24e969aa29
commit b574a82d10
1 changed files with 63 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
mm/damon/sysfs-schemes.c
View File

@ -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,
&region->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(&region->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, &regions->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(&region->kobj,
&damon_sysfs_scheme_region_ktype,
&sysfs_regions->kobj, "%d",
sysfs_regions->nr_regions)) {
kobject_put(&region->kobj);
return;
}
sysfs_regions->nr_regions))
goto out;
if (damos_sysfs_region_add_dirs(region))
goto out;
list_add_tail(&region->list, &sysfs_regions->regions_list);
sysfs_regions->nr_regions++;
return;
out:
kobject_put(&region->kobj);
}
int damon_sysfs_schemes_clear_regions(