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mm/damon/paddr: support data attributes monitoring

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Implement and register damon_operations->apply_probes() callback to
support data attributes monitoring.

Link: https://lore.kernel.org/20260518234119.97569-9-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
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: Shuah Khan <shuah@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park 2026-05-18 16:40:56 -07:00 committed by Andrew Morton
parent 9b1f8c8d01
commit 09acfaced2
1 changed files with 62 additions and 0 deletions
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62
mm/damon/paddr.c
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@ -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,