@@ -286,6 +286,8 @@ struct damos_watermarks {
* @sz_tried: Total size of regions that the scheme is tried to be applied.
* @nr_applied: Total number of regions that the scheme is applied.
* @sz_applied: Total size of regions that the scheme is applied.
+ * @sz_ops_filter_passed:
+ * Total bytes that passed ops layer-handled DAMOS filters.
* @qt_exceeds: Total number of times the quota of the scheme has exceeded.
*
* "Tried an action to a region" in this context means the DAMOS core logic
@@ -310,6 +312,7 @@ struct damos_stat {
unsigned long sz_tried;
unsigned long nr_applied;
unsigned long sz_applied;
+ unsigned long sz_ops_filter_passed;
unsigned long qt_exceeds;
};
@@ -1362,13 +1362,15 @@ static bool damos_skip_charged_region(struct damon_target *t,
}
static void damos_update_stat(struct damos *s,
- unsigned long sz_tried, unsigned long sz_applied)
+ unsigned long sz_tried, unsigned long sz_applied,
+ unsigned long sz_ops_filter_passed)
{
s->stat.nr_tried++;
s->stat.sz_tried += sz_tried;
if (sz_applied)
s->stat.nr_applied++;
s->stat.sz_applied += sz_applied;
+ s->stat.sz_ops_filter_passed += sz_ops_filter_passed;
}
static bool __damos_filter_out(struct damon_ctx *ctx, struct damon_target *t,
@@ -1586,7 +1588,7 @@ static void damos_apply_scheme(struct damon_ctx *c, struct damon_target *t,
r->age = 0;
update_stat:
- damos_update_stat(s, sz, sz_applied);
+ damos_update_stat(s, sz, sz_applied, sz_ops_filter_passed);
}
static void damon_do_apply_schemes(struct damon_ctx *c,
Implement a new per-DAMOS scheme statistic field, namely sz_ops_filter_passed, using the changed damon_operations->apply_scheme() interface. It counts total bytes of memory that given DAMOS action tried to be applied, and passed the operations layer handled region-internal filters of the scheme. DAMON API users can access it using DAMON-internal safe access features such as damon_call() and/or damos_walk(). Signed-off-by: SeongJae Park <sj@kernel.org> --- include/linux/damon.h | 3 +++ mm/damon/core.c | 6 ++++-- 2 files changed, 7 insertions(+), 2 deletions(-)