diff options
| author | SeongJae Park <sj@kernel.org> | 2026-05-18 16:40:56 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-05-28 21:31:12 -0700 |
| commit | abd3285d0b3d3f125c0d414e63392a89fd3e177f (patch) | |
| tree | ac02aaee2b50ecc9f142ca1449afb53dbc461ed5 /mm | |
| parent | e7dabe295bf49df308958caa9ea37992d5a7fd06 (diff) | |
| download | linux-next-history-abd3285d0b3d3f125c0d414e63392a89fd3e177f.tar.gz | |
mm/damon/paddr: support data attributes monitoring
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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/damon/paddr.c | 62 |
1 files changed, 62 insertions, 0 deletions
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, |