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b=X3w8+4T1W3iNDJnRNOsh+A55B+RcmvuWDBMe5TonS+ne5qofWDudjhSrVuME5OyFz Qs7KPBG5AuG8LmcJIx4LNnGVkWApeaRCiu6NLQfZhZGzHuC4aDM8GsBxzH7BeKBR0d 6agISdRkDPWbMlCHnNGHaDHp6hIi6cD28HI3LDRc/OjY6uDOVz79woxAaROzms4/P5 XotRF9QgDLkJ+u36QxqffkICMVbvQ3/EWp/IYbaGPT6lqxCuJQ60cCtWKhm+Tl+lwp D3QgnGfvuwTQetjowQg4J9O0tvyKea5Dp944AUHWu8ercaFSi7zNUqm84Njbxd9RvJ 8AOd0eKYx6Hgw== 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 v3 08/28] mm/damon/paddr: support data attributes monitoring Date: Sat, 16 May 2026 11:36:49 -0700 Message-ID: <20260516183712.81393-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260516183712.81393-1-sj@kernel.org> References: <20260516183712.81393-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 5288D10000B X-Stat-Signature: zxxwht1bj1j439wg7498k9bcr8z7u4za X-HE-Tag: 1778956648-872814 X-HE-Meta: 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 kBnnKbOR 1zBA26KcO64C31I9Ojbu6JtLa6Ihz/XOuVPbTX2Ap0qbcvNxbEfsPTDERd+Wb/Sev72TETChXouj1AoL4UqOK29GemhY0WDg06PY3qx3iHjM8yg74xYCNNsi9Xprv1qA756n7yasqtJ8qd1jOkZbj4CwU5pxKWI0maFwW0P6DYnuSD8ioReRwlH8mxsogLnIZg5Dqm1+sUPkVZuH2N4XZuAFFiB3ItBnd3lZdj9rJePJ+NNo= 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 5cdcc5037cbc1..81780b05c175e 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