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| author |   SeongJae Park <sj@kernel.org> | 2025-01-06 11:33:52 -0800 |
|---|---|---|
| committer |   Andrew Morton <akpm@linux-foundation.org> | 2025-01-25 20:22:27 -0800 |
| commit | 60fa9355a6c620f7b727d3fdb433fb6cf714a9b0 (patch) | |
| tree | 24d458f70255f4db05ace63244459a965a42d981 | |
| parent | mm/damon/paddr: report filter-passed bytes back for DAMOS_STAT action (diff) | |
| download | wireguard-linux-60fa9355a6c620f7b727d3fdb433fb6cf714a9b0.tar.xz wireguard-linux-60fa9355a6c620f7b727d3fdb433fb6cf714a9b0.zip | |
mm/damon/core: implement per-scheme ops-handled filter-passed bytes stat
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().
Link: https://lkml.kernel.org/r/20250106193401.109161-8-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>
| -rw-r--r-- | include/linux/damon.h | 3 | ||||
| -rw-r--r-- | mm/damon/core.c | 6 |
2 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/damon.h b/include/linux/damon.h index da003173210f..2a93dbe06ecc 100644 --- a/include/linux/damon.h +++ b/include/linux/damon.h @@ -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; }; diff --git a/mm/damon/core.c b/mm/damon/core.c index c6ccb4825c57..c4ce72a86d81 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -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, |