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b=TwTHbYD0GHARWC1RgNnGp1Xz90K/OzzCFZa5sFhLp0BnrB6O1hF4P75yI6JrM6jGL YE5eYgwqsMQcdrieFDZ1nMbymu0ZSxBlPoP34Il6Kk1pjZqz7iDoec4Sq4MeROGm3y ki99IrLSIu56dMBu4fji0P6BFnZoL2ds2HEvsaMiasGd783981K7srP/qqOqFjaUH9 6OKixbVsf5ZZeeHLqLCY3YofmbAqNin0aM+fkIG9nCKDn8tzxvFH/wsVUK+tvGViyU oJNI/0elOF1oXbm9zXvfa8utm2EciLB+4h0zHFCIynsZz70N6xQKjiyqyKWDrCrP+8 NnqT4Og++DG+Q== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.1 08/28] mm/damon/paddr: support data attributes monitoring Date: Thu, 14 May 2026 07:08:41 -0700 Message-ID: <20260514140904.119781-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260514140904.119781-1-sj@kernel.org> References: <20260514140904.119781-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: A8C29120010 X-Stat-Signature: migbdddunf1o4kn6ccn7cphhojfj6axm X-Rspam-User: X-HE-Tag: 1778767761-441172 X-HE-Meta: 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 35Pq1EdJ QfkOG/L2y/O/lgectHpRA/cZw0KnHNnPClxU5XfbZId0kVc2LJnjdj59idurf+8ZK+HT1fYB1FVhR8+JWVhJVcwx904qIK3OZi3qhRj+HHCKTps2prKPA9r27Q8ogNR1ndb90aFgItXDHCTO5IyylPn7MkZov3QSjldHErV0scjsALk/B+CRg1FnzTJYZw7m4hfCFhX3fY2ac9hatFIfXv57pcFq1gg57xFuS Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement and register damon_operations->apply_probes() callback to support data attributes monitoring. Signed-off-by: SeongJae Park --- mm/damon/paddr.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index c4738cd5e221e..e60af2cbc1089 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 damon_probe *p) +{ + struct damon_filter *f; + struct folio *folio; + bool pass = true; + + folio = damon_get_folio(PHYS_PFN(pa)); + damon_for_each_filter(f, p) { + if (damon_pa_filter_match(f, folio)) { + pass = f->allow; + break; + } + pass = !f->allow; + } + if (folio) + folio_put(folio); + 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; + + damon_for_each_probe(p, ctx) { + phys_addr_t pa; + + pa = damon_pa_phys_addr(r->sampling_addr, + ctx->addr_unit); + if (damon_pa_filter_pass(pa, p)) + r->probe_hits[i]++; + i++; + } + } + } +} + /* * 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