Commit 9caac9d5 authored by SeongJae Park's avatar SeongJae Park Committed by Andrew Morton
Browse files

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

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: default avatarSeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 60fa9355

mm/damon/sysfs-schemes.c

+16 −0
Original line number Diff line number Diff line
@@ -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;

	}

}