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b=p4ICceRAbBffvDG9myKtbeCFfZMPjBeJhpxt40NJZFu8JcOfWccI1H5xfmFfVqlo/ wQHeO4Ujlv2DgLvLN+P5JtHVzOiPqwLPKW+yXXqi8soEVkfkagqyAXrpJUTyHdEtrh f3Hpdz2yIbLx8ZIXPW79UCk/2pFIsRHyKtUxWLEaDrcyD686rW2BKQ9De4WjS3OR5o oVEL7bKuBrGh5DEHh2xKzSHY/UZZeinXYafPw4SWBo4VzulEiXEQeW6Xh0qpmnUSGp n57NMdQCq0g9jWpgqaJCrG/jfIvC90pXmkx9jj6w1Ef4M5yeJhd0Ljd2kOyaIZnB3D uWs8X7p7PnbSw== 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 08/28] mm/damon/paddr: support data attributes monitoring Date: Tue, 12 May 2026 07:36:23 -0700 Message-ID: <20260512143645.113201-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260512143645.113201-1-sj@kernel.org> References: <20260512143645.113201-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: E171214000F X-Stat-Signature: 88qoj6gjmxottucnmoskezob6kbyxc8u X-HE-Tag: 1778596621-602995 X-HE-Meta: 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 WMP8+F5B cKWFUNzYlod9UW6atsd01gZpHpBCUagmgeCvWrJupNg9yRlXj2uTUdY1PCSF1v/ZXFku/Ytbdoyt/SKe85I+QvwWCZDFSJR6eKTecbapaty2eOgH6pnG1k4t8cyn071dJNtRR28PO4upZ9CyBzk2UHDfSPs78UbUu1m69VzdPIbHjNALKWSmp40bBobqYyxl1BEljMOX/EfYDNegqaQLHGw4k4/IcxwypsHQGrQej4lZbJOw= 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