From: SeongJae Park <sj@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: SeongJae Park <sj@kernel.org>,
damon@lists.linux.dev, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: [PATCH 08/28] mm/damon/paddr: support data attributes monitoring
Date: Mon, 18 May 2026 16:40:56 -0700 [thread overview]
Message-ID: <20260518234119.97569-9-sj@kernel.org> (raw)
In-Reply-To: <20260518234119.97569-1-sj@kernel.org>
Implement and register damon_operations->apply_probes() callback to
support data attributes monitoring.
Signed-off-by: SeongJae Park <sj@kernel.org>
---
mm/damon/paddr.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index c4738cd5e221e..9997c5174ef1b 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -120,6 +120,67 @@ static unsigned int damon_pa_check_accesses(struct damon_ctx *ctx)
return max_nr_accesses;
}
+static bool damon_pa_filter_match(struct damon_filter *filter,
+ struct folio *folio)
+{
+ bool matched = false;
+
+ switch (filter->type) {
+ case DAMON_FILTER_TYPE_ANON:
+ if (!folio) {
+ matched = false;
+ break;
+ }
+ matched = folio_test_anon(folio);
+ break;
+ default:
+ break;
+ }
+ return matched == filter->matching;
+}
+
+static bool damon_pa_filter_pass(phys_addr_t pa, struct folio *folio,
+ struct damon_probe *p)
+{
+ struct damon_filter *f;
+ bool pass = true;
+
+ damon_for_each_filter(f, p) {
+ if (damon_pa_filter_match(f, folio)) {
+ pass = f->allow;
+ break;
+ }
+ pass = !f->allow;
+ }
+ return pass;
+}
+
+static void damon_pa_apply_probes(struct damon_ctx *ctx)
+{
+ struct damon_target *t;
+ struct damon_region *r;
+ struct damon_probe *p;
+
+ damon_for_each_target(t, ctx) {
+ damon_for_each_region(r, t) {
+ int i = 0;
+ phys_addr_t pa;
+ struct folio *folio;
+
+ pa = damon_pa_phys_addr(r->sampling_addr,
+ ctx->addr_unit);
+ folio = damon_get_folio(PHYS_PFN(pa));
+ damon_for_each_probe(p, ctx) {
+ if (damon_pa_filter_pass(pa, folio, p))
+ r->probe_hits[i]++;
+ i++;
+ }
+ if (folio)
+ folio_put(folio);
+ }
+ }
+}
+
/*
* damos_pa_filter_out - Return true if the page should be filtered out.
*/
@@ -371,6 +432,7 @@ static int __init damon_pa_initcall(void)
.update = NULL,
.prepare_access_checks = damon_pa_prepare_access_checks,
.check_accesses = damon_pa_check_accesses,
+ .apply_probes = damon_pa_apply_probes,
.target_valid = NULL,
.apply_scheme = damon_pa_apply_scheme,
.get_scheme_score = damon_pa_scheme_score,
--
2.47.3
next prev parent reply other threads:[~2026-05-18 23:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-18 23:40 [PATCH 00/28] mm/damon: introduce data attributes monitoring SeongJae Park
2026-05-18 23:40 ` [PATCH 01/28] mm/damon/core: introduce struct damon_probe SeongJae Park
2026-05-18 23:40 ` [PATCH 02/28] mm/damon/core: embed damon_probe objects in damon_ctx SeongJae Park
2026-05-18 23:40 ` [PATCH 03/28] mm/damon/core: introduce damon_filter SeongJae Park
2026-05-18 23:40 ` [PATCH 04/28] mm/damon/core: commit probes SeongJae Park
2026-05-18 23:40 ` [PATCH 05/28] mm/damon/core: introduce damon_region->probe_hits SeongJae Park
2026-05-18 23:40 ` [PATCH 06/28] mm/damon/core: introduce damon_ops->apply_probes SeongJae Park
2026-05-18 23:40 ` [PATCH 07/28] mm/damon/core: do data attributes monitoring SeongJae Park
2026-05-18 23:40 ` SeongJae Park [this message]
2026-05-18 23:40 ` [PATCH 09/28] mm/damon/sysfs: implement probes dir SeongJae Park
2026-05-18 23:40 ` [PATCH 10/28] mm/damon/sysfs: implement probe dir SeongJae Park
2026-05-18 23:40 ` [PATCH 11/28] mm/damon/sysfs: implement filters directory SeongJae Park
2026-05-18 23:41 ` [PATCH 12/28] mm/damon/sysfs: implement filter dir SeongJae Park
2026-05-18 23:41 ` [PATCH 13/28] mm/damon/sysfs: implement filter dir files SeongJae Park
2026-05-18 23:41 ` [PATCH 14/28] mm/damon/sysfs: setup probes on DAMON core API parameters SeongJae Park
2026-05-18 23:41 ` [PATCH 15/28] mm/damon/sysfs-schemes: implement tried_regions/<r>/probes/ SeongJae Park
2026-05-18 23:41 ` [PATCH 16/28] mm/damon/sysfs-schemes: implement probe dir SeongJae Park
2026-05-18 23:41 ` [PATCH 17/28] mm/damon/sysfs-schemes: implement probe/hits file SeongJae Park
2026-05-18 23:41 ` [PATCH 18/28] mm/damon: trace probe_hits SeongJae Park
2026-05-18 23:41 ` [PATCH 19/28] selftests/damon/sysfs.sh: test probes dir SeongJae Park
2026-05-18 23:41 ` [PATCH 20/28] Docs/mm/damon/design: document data attributes monitoring SeongJae Park
2026-05-18 23:41 ` [PATCH 21/28] Docs/admin-guide/mm/damon/usage: " SeongJae Park
2026-05-18 23:41 ` [PATCH 22/28] mm/damon/core: introduce DAMON_FILTER_TYPE_MEMCG SeongJae Park
2026-05-18 23:41 ` [PATCH 23/28] mm/damon/paddr: support DAMON_FILTER_TYPE_MEMCG SeongJae Park
2026-05-18 23:41 ` [PATCH 24/28] mm/damon/sysfs: add filters/<F>/path file SeongJae Park
2026-05-18 23:41 ` [PATCH 25/28] mm/damon/sysfs-schemes: move memcg_path_to_id() to sysfs-common SeongJae Park
2026-05-18 23:41 ` [PATCH 26/28] mm/damon/sysfs: setup damon_filter->memcg_id from path SeongJae Park
2026-05-18 23:41 ` [PATCH 27/28] Docs/mm/damon/design: update for memcg damon filter SeongJae Park
2026-05-18 23:41 ` [PATCH 28/28] Docs/admin-guide/mm/damon/usage: " SeongJae Park
2026-05-18 23:53 ` [PATCH 00/28] mm/damon: introduce data attributes monitoring SeongJae Park
2026-05-19 0:54 ` Andrew Morton
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