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mm/damon/syfs-schemes: implement per-scheme filter-passed bytes stat

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Add a new DAMON sysfs interface file under scheme stat directory, namely
'sz_ops_filter_passed'.  It represents total bytes that passed
region-internal DAMOS filters of the scheme that handled by the DAMON
operations set layer.

Link: https://lkml.kernel.org/r/20250106193401.109161-9-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2025-01-06 11:33:53 -08:00
committed by Andrew Morton
parent 60fa9355a6
commit 9caac9d55f
1 changed files with 16 additions and 0 deletions
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16
mm/damon/sysfs-schemes.c
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@@ -188,6 +188,7 @@ struct damon_sysfs_stats {
unsigned long sz_tried;
unsigned long nr_applied;
unsigned long sz_applied;
unsigned long sz_ops_filter_passed;
unsigned long qt_exceeds;
};
@@ -232,6 +233,15 @@ static ssize_t sz_applied_show(struct kobject *kobj,
return sysfs_emit(buf, "%lu\n", stats->sz_applied);
}
static ssize_t sz_ops_filter_passed_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct damon_sysfs_stats *stats = container_of(kobj,
struct damon_sysfs_stats, kobj);
return sysfs_emit(buf, "%lu\n", stats->sz_ops_filter_passed);
}
static ssize_t qt_exceeds_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@@ -258,6 +268,9 @@ static struct kobj_attribute damon_sysfs_stats_nr_applied_attr =
static struct kobj_attribute damon_sysfs_stats_sz_applied_attr =
__ATTR_RO_MODE(sz_applied, 0400);
static struct kobj_attribute damon_sysfs_stats_sz_ops_filter_passed_attr =
__ATTR_RO_MODE(sz_ops_filter_passed, 0400);
static struct kobj_attribute damon_sysfs_stats_qt_exceeds_attr =
__ATTR_RO_MODE(qt_exceeds, 0400);
@@ -266,6 +279,7 @@ static struct attribute *damon_sysfs_stats_attrs[] = {
&damon_sysfs_stats_sz_tried_attr.attr,
&damon_sysfs_stats_nr_applied_attr.attr,
&damon_sysfs_stats_sz_applied_attr.attr,
&damon_sysfs_stats_sz_ops_filter_passed_attr.attr,
&damon_sysfs_stats_qt_exceeds_attr.attr,
NULL,
};
@@ -2077,6 +2091,8 @@ void damon_sysfs_schemes_update_stats(
sysfs_stats->sz_tried = scheme->stat.sz_tried;
sysfs_stats->nr_applied = scheme->stat.nr_applied;
sysfs_stats->sz_applied = scheme->stat.sz_applied;
sysfs_stats->sz_ops_filter_passed =
scheme->stat.sz_ops_filter_passed;
sysfs_stats->qt_exceeds = scheme->stat.qt_exceeds;
}
}