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| author | SeongJae Park <sj@kernel.org> | 2025-12-16 11:01:15 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-01-21 06:24:43 +0300 |
| commit | 83a741b9742505bda70e6cd82dc5cb32baf5e16c (patch) | |
| tree | e73cb228f50ac0799c948f5176dc0176e4fa77ff | |
| parent | 4a6ceb7c9744c69546d4ca43b7bd308f4db0927b (diff) | |
| download | linux-83a741b9742505bda70e6cd82dc5cb32baf5e16c.tar.xz | |
mm/damon/sysfs-schemes: introduce nr_snapshots damos stat file
Introduce a new DAMON sysfs interface file for exposing the newly added
DAMOS stat, nr_snapshots. The file has the name same to the stat name
(nr_snapshots) and placed under the damos stat sysfs directory.
Link: https://lkml.kernel.org/r/20251216080128.42991-3-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
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: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/damon/sysfs-schemes.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index b52fc3b45b30..b7fcd7590ab3 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -204,6 +204,7 @@ struct damon_sysfs_stats { unsigned long sz_applied; unsigned long sz_ops_filter_passed; unsigned long qt_exceeds; + unsigned long nr_snapshots; }; static struct damon_sysfs_stats *damon_sysfs_stats_alloc(void) @@ -265,6 +266,15 @@ static ssize_t qt_exceeds_show(struct kobject *kobj, return sysfs_emit(buf, "%lu\n", stats->qt_exceeds); } +static ssize_t nr_snapshots_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->nr_snapshots); +} + static void damon_sysfs_stats_release(struct kobject *kobj) { kfree(container_of(kobj, struct damon_sysfs_stats, kobj)); @@ -288,6 +298,9 @@ static struct kobj_attribute damon_sysfs_stats_sz_ops_filter_passed_attr = static struct kobj_attribute damon_sysfs_stats_qt_exceeds_attr = __ATTR_RO_MODE(qt_exceeds, 0400); +static struct kobj_attribute damon_sysfs_stats_nr_snapshots_attr = + __ATTR_RO_MODE(nr_snapshots, 0400); + static struct attribute *damon_sysfs_stats_attrs[] = { &damon_sysfs_stats_nr_tried_attr.attr, &damon_sysfs_stats_sz_tried_attr.attr, @@ -295,6 +308,7 @@ static struct attribute *damon_sysfs_stats_attrs[] = { &damon_sysfs_stats_sz_applied_attr.attr, &damon_sysfs_stats_sz_ops_filter_passed_attr.attr, &damon_sysfs_stats_qt_exceeds_attr.attr, + &damon_sysfs_stats_nr_snapshots_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_stats); @@ -2762,6 +2776,7 @@ void damon_sysfs_schemes_update_stats( sysfs_stats->sz_ops_filter_passed = scheme->stat.sz_ops_filter_passed; sysfs_stats->qt_exceeds = scheme->stat.qt_exceeds; + sysfs_stats->nr_snapshots = scheme->stat.nr_snapshots; } } |