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 8E944301493; Sun, 26 Apr 2026 20:52:37 +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=1777236757; cv=none; b=UlNJEsen+4ZTUlhCx5ulOerwI5cTy2Hx0l4vq92weJaFHM42oMxmvSehQ/fRZBHLoRyhliAcrcQfNGjiNIX8II9G4AzjVc0LTBx4ye810s612yjJYHlNstp67+4qYtDjWglqLpWbpmAaXVVwAYBDx60ZMLikHD2vuR7XrWW/0B8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777236757; c=relaxed/simple; bh=HJ0qb7oUAaoxmDsZao082N7cLDcGDLFu+2qQv2Gc5Gs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=j4Q4jR7MHUhWI6HisnCduqzIEMEA+UWSdbPVsD3YWfFSmc5UcI5xWZO5p8Kpl0/1NE71BAbPwdTj1ZlwtDy/k25G61PJCMdtoNBvhuWoQkZ9f2GE//9roumUN1ZjKR/VwNhR7FBSksTGYj4R68qyKStWGRgJDocyR7fNPmkbsc0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S/0Ya48K; 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="S/0Ya48K" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39A56C2BCAF; Sun, 26 Apr 2026 20:52:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777236757; bh=HJ0qb7oUAaoxmDsZao082N7cLDcGDLFu+2qQv2Gc5Gs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S/0Ya48KYKkrK37e94LOhSRnzfxTxt14tjEDmMpyuAEmdpPr/MpPbp3Isb6DiSJlG g023Jo+R7gYbNW7X5FYNE+ZkLLBl2BVuudJpdDT9G7/fdjtnr2YXsnfxAe1gX+fGVS 8iPf1vJepsINzLzdF1A7JjG/87G8eJwktjsszHJMtGh27ztaUdbdfm9E3X3e/QF3l8 iKi5CFIv+zuO6tMx9EAIYnp28uyWShjISOa5Ro7I3cafTL0JL2e4B39oB7Mcar64fu i+8YqOLe/2oacF8dnDUBtGdKfRuASXeEekr5PlNfxqi+pQd9/fyxS9M1w773Vc9p6D PZX8TQfQRSVxw== 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 08/19] mm/damon/paddr: support data attributes monitoring Date: Sun, 26 Apr 2026 13:52:09 -0700 Message-ID: <20260426205222.93895-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260426205222.93895-1-sj@kernel.org> References: <20260426205222.93895-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org 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 | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index 5cdcc5037cbc1..cacfbf774ca4f 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -120,6 +120,50 @@ static unsigned int damon_pa_check_accesses(struct damon_ctx *ctx) return max_nr_accesses; } +static bool damon_pa_filter_pass(phys_addr_t pa, struct damon_probe *p) +{ + struct damon_filter *f; + bool default_pass = true; + + damon_for_each_filter(f, p) { + bool matched = false; + + if (f->type == DAMON_TEST_TYPE_ANON) { + struct folio *folio = damon_get_folio(PHYS_PFN(pa)); + + if (folio) + matched = folio_test_anon(folio); + } + if (matched) + return f->allow; + default_pass = !f->allow; + } + return default_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 +415,7 @@ 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