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b=c305JDKtdZwckegZOgZqdHs3w1vbcaGR12vM+XkFcV/Er2btR8k1MWJwb9fycDBus ripuud6obkSso8KB9L4rSdbxUEDoijhQ6ZQeEqY7YkHEqa1o9sDGYm3/7OXwEQd5M/ klXv1oHXsyymGwYXMeJmZfgjmdFxBUuoLBeE7ayixMTskUWotEKil8awTg7GmD/HL8 caBK+U7g8N1zokS88daF3Ki3bb7nfJHPHVbLiAjmo7CbsEtVyd3jzfx21Q+/b+6zu1 YEiwad+2vF1SGqiCWjsk5T1QsmG3UHSgSjFk/MLFNqTB8SgI4hVOkRH7Ky0PmEsbhs eJT+LlfRL+QuQ== 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 v2.2 08/28] mm/damon/paddr: support data attributes monitoring Date: Thu, 14 May 2026 17:44:09 -0700 Message-ID: <20260515004433.128933-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260515004433.128933-1-sj@kernel.org> References: <20260515004433.128933-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: CCA3A4000C X-Stat-Signature: znuw1nt6d4gwxhf8a6ghbt1fjxin8hub X-HE-Tag: 1778805889-251771 X-HE-Meta: U2FsdGVkX19AVSWbIxA6I5AKfyIv3N/MM2l7ELcMx4C9gbDLQzkoGyoxi9tEZeBM7d/9CMuDH1f5s/PqbbYWlWVBeabqW+nD8a4PfX+bbx4TUKoV6YdkmEWB2hg9fYGdqwsnDjdhTwDZg2fKLF41E/0+EhkmI+DrLnhxGdyQ82yk/2hVGSyXA4y2sXK8WifgRGFI2lgB43E4TSkDhd/xa8o8sfLz3B7tSGrQhWPP87JXjwnwGA8+hfntnSJFARD1xx/0Q7Ngf30jYW2PeSL3/hF1oMHAqHZzRG6WFdXJpRK1aL/T3IyVqvUMmmdTS8YqRyqZMR6MVE/bIwPQVGgtsXg27CyshKPrmI9F3zZnCFs8qy4+hkH01b044tDeU5vSs4sjwS7uUNnmalUZide2ToZstW5BBTyzIM5QylgUdOlIXTfTGBzfccZ/cankiQqNJ5hKpkgDsmzalNUzfgISBqJfFCyE3E5IQei+qFglgbGe92eaL2BVBzP723YOrGP+rgEKK7bWxON0QRtfldPZTDl9St8KGpkUborXsjsELp0ac7gL0VuDv35BscKrY5uLNXd9oOwFXAHXcXDJULJVzA7pEltqN2iB3NhGCDdI9drQXmvBry3coyhboE9qGBlV7WSz0avilm+jVQenlYXI+08gjB9b2731vKlaBquzS4OnigDRxbOsrm6uecZMkYOEknfXz23XB6811m70ovvbA5Qi8PGuWiaT1T6YFyUFBomtyvTEnFWPtU+Hhr4x5MnwrDxwedksPUxUj2VY6g03YBtIndnf1WST7IBoKhswZrSpebjR+ZTnR45h+VfS19AEe1VgIgDgjaQr8VWa3cK7WLAR5cuVj87slhs/Xoak7MONfLh6aj5KtClgtR8NuMYIUkHmYsDr90qQXU3Ztu8iSdQsyD2kEO27qXMUzE36jJSqluST4xBWF8x9vjLPrNNO6vjA0ZHL0YDGCxaYIZi 0feudGQK mcLZnnobpCOhdNrneO/o5bueewrPp6XHqtm4wdu+0Kt+NkVYOEyMyiVQT8fGqBqcrzL94qXDvOyvCNBeg2TTM/Lo+zd243hXCueLIIFe/LbVxlVd/4taWLO9T39AJEouF+8ke1CRjx6w0Og9xabYlcS8G1MPgkp+hl//46s78fV7JPSFOAnJLKoFuoyxH2ZPshdk6WgvyI1cQg6Kwq7L9dzQB8I3P+IABiwob 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..493bcca8ff104 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