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b=JTA9vo/O0Xr5kznzHrfK+9YrtR3JWfTICJHBHiwShjW6hCG/dT20uJsCq5m/tawNn iwMD6ihHE/CtmV7T11aplUeNxneg89abq9jdcoxRW0/ZfhxUIoY7DFjOQ810fYQ5NY 6OwxIRRH8U7bqrOyWa43q5JV3Rt5oqmZ9NHbysNdOoe3CI7fkpL07vjF81eq0NMcDH qCM8W0G6d9VoDRj41HICy3O/9GmMAKZYY7fx1V2IfKOuxexCiUiwViKkhFDbC3JhIk UmpKZxj2NWZ9Vnk1YLN4FVKXtVxaYIq3j0gVgqfeo/TGPbeQcZAOFWJL/OUr0I1wAD 0PLrySLWvYgXQ== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , 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 Message-ID: <20260518234119.97569-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260518234119.97569-1-sj@kernel.org> References: <20260518234119.97569-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: C6922A0009 X-Stat-Signature: xwkxz5suw81ic1rdst87kzmbiig5jqpc X-Rspam-User: X-HE-Tag: 1779147687-998301 X-HE-Meta: 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 oXpqCWze tRmAqIQ2I6O+C695PzOu6E7voUn4fRpitMNqhFO28G5OOoN3P0Kip99uW/3sjlQkCfwZI+4jU0V8tG2DtB1qpPE7XEfX5fF/Rk5ZbGZC7M0ZPpgmURXB1BcmYPz880HBCgK6kBzqMiActfwJWm38RMh/soatGZ2cb+iZM2dC6xYuGX1fdUJWGAQ+zIgCkMPpsMXwc9GE82qJT/A9jAKmhrx2j++0nBJiqyEhiPJ2EYB/l168= 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..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