From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 59486342CB4; Sat, 16 May 2026 18:37:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778956647; cv=none; b=h2bl0N6AQFsYkZt4+7tdHm7vhrQCo0lbIDvLXcR0OCVTqDQEAAHmTD8jmwbPAtXPZxE1/8P93n+jDSqhqQmw/CpwlL4UWY24p8bEcm4J3JJpaDIirYBgV1d2OUiu/TOHSaxPhkLWqgEdYb3XMiHJJ6kPg7pgb/US4Zfp6QXEWxg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778956647; c=relaxed/simple; bh=YUEUEwyNL9PReREavu4cR4f44O9YYFDKrNpJr/Ooyz0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qbIU3Ovpu+QEvk9eBeZp/oVkZapQKgbCEGBG49MF+qn/MO24QGJoxF1eP6ECk/lGdxu9tyAhRzJtcSD/tgQtlT26QbEwbzp7ZtVMNomTrxJjE/gK9lPzZz8s4i9nGxFoYOznuwzStMMhqsTSLRxaTtkDLUidLKcyx9L8atTlB0w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=X3w8+4T1; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="X3w8+4T1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 127B2C2BCC7; Sat, 16 May 2026 18:37:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1778956647; bh=YUEUEwyNL9PReREavu4cR4f44O9YYFDKrNpJr/Ooyz0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; 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> Precedence: bulk X-Mailing-List: damon@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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