From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5AF88C61DD6 for ; Tue, 1 Sep 2026 04:35:12 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A69156B00EE; Tue, 1 Sep 2026 00:34:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9EF256B00F5; Tue, 1 Sep 2026 00:34:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5CEDA6B00F6; Tue, 1 Sep 2026 00:34:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 1A1E66B00F0 for ; Tue, 1 Sep 2026 00:34:32 -0400 (EDT) Received: from smtpin30.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 9DCAB1602B3 for ; Tue, 1 Sep 2026 04:34:30 +0000 (UTC) X-FDA: 85163927100.30.909E9C8 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf31.hostedemail.com (Postfix) with ESMTP id 14FAF20002 for ; Tue, 1 Sep 2026 04:34:28 +0000 (UTC) Authentication-Results: imf31.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=mdDh3UTq; spf=pass (imf31.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1788237269; b=urWu520mihrXwQC2hQD2zjdEZaxsN38ndj8xBO2qz7Jl3e1Hx0WkHnUA4V4Yuqrjr1e8my SMJ+KUgddBPfZ0jyXBGhszOu9q51JdbyKZAy72UiH4tne1PqmEKPmQZcvLU0qv+MjlXYAU Bm959txtvVncBNFFCT0qxpmsFsMvgqc= ARC-Authentication-Results: i=1; imf31.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=mdDh3UTq; spf=pass (imf31.hostedemail.com: domain of sj@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1788237269; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=OpyWxBrGaST77vm6YyG0Qbwcf9E6DAqPTZr9W1qgAUU=; b=CZ1cc89ky/xFFDm+4izO8d95fV7uilTjZvt7reaVhICUZNCWjUFhXD5rNSsWwHAiXVp2+m OvUDYme6gelCWMO9+48In+b/93N0DnKfQtgIfbc9EzdDBOdZ5f/BbSV0WhgtAwHQmQttTi CIwoTXUw3xClx+qu7tuHdASorzPk+uw= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id A7436602C5; Tue, 1 Sep 2026 04:34:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 382991F00ACA; Tue, 1 Sep 2026 04:34:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788237268; bh=OpyWxBrGaST77vm6YyG0Qbwcf9E6DAqPTZr9W1qgAUU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=mdDh3UTqfrDhR7uBGv/FI05EnOJmHfyawvr+M1N0YN28ZIXhcm6e4UmmUvwN6/sIS RK79G41zR+Gqh0QpHT9MGwojDAmVH6kMk3iOnupR9pMbwVG+HgkOEEQLOtRrZDhO6r aVes3UwJfL8tWIEdfx5Cs02LfPJqS5XjJj34WvuIUOJfFIUfP1U/q7MGpO1NJu+8CB 2ozfeuYy2ZIZj/CGgtz9erURMlYZGsZQWF7B6yXb5avGCnrvjtBW55UjP7N8Z6hPdO vurrv/20EULnHR1IHl5KqzYnWGgcwe1DHyi9t+cXx98zAi3wU4ENrsBS35FebqHjr5 +Q/IOKB2YsiRA== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 08/17] mm/damon/paddr: support damon_prep Date: Mon, 31 Aug 2026 21:34:04 -0700 Message-ID: <20260901043417.2165-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260901043417.2165-1-sj@kernel.org> References: <20260901043417.2165-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 14FAF20002 X-Stat-Signature: sjnee9irufg1wyxm663tfjabboef3358 X-HE-Tag: 1788237268-205512 X-HE-Meta: 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 0v003Ue+ ORCB1G92xCEaXTfzRpQqlGlqtRpoDzepuOi5DHXOlMscz70q3nsOfceE/+w6EyYZHEPFuccRCPgOgkSZtDzxVhBAydrdNAeUveUluRctaFxzs1Jy/F52cgziRlE4b/8zPFfKhsow+sEEyBFl/PNJdv9x004LDLhpfNJwkq6q1p9UFrjlJVjcr7iLT1+o0fuAU/q4CM+A/nIvMEJH/Gg8wlLnMrk1ITVXvN1+xtP8dSQgwjkcj62j2a0lY+ZPb0bMjTFEdMQlbS2IuiJ+RCh4zjf4Awg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement damon_operations->prep_probes() callback. Support the only existing prep action, DAMON_PREP_SET_PGIDLE in a way similar to what it was doing for the access check preparation: unset page table accessed bits and set PG_Idle flag. Reuse the function for the access check preparation. Signed-off-by: SJ Park --- mm/damon/paddr.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c index 6f756f8493894..c1e7d7a4f40df 100644 --- a/mm/damon/paddr.c +++ b/mm/damon/paddr.c @@ -105,6 +105,40 @@ static unsigned int damon_pa_check_accesses(struct damon_ctx *ctx) return max_nr_accesses; } +static void damon_pa_prep_probes_region(struct damon_region *r, + struct damon_probe *probe, struct damon_ctx *ctx) +{ + struct damon_prep *p; + + damon_for_each_prep(p, probe) { + switch (p->action) { + case DAMON_PREP_SET_PGIDLE: + damon_pa_mkold(damon_pa_phys_addr(r->sampling_addr, + ctx->addr_unit)); + break; + default: + break; + } + } +} + +static void damon_pa_prep_probes(struct damon_ctx *ctx, bool set_samples) +{ + struct damon_target *t; + struct damon_region *r; + struct damon_probe *p; + + damon_for_each_target(t, ctx) { + damon_for_each_region(r, t) { + if (set_samples) + r->sampling_addr = damon_rand(ctx, r->ar.start, + r->ar.end); + damon_for_each_probe(p, ctx) + damon_pa_prep_probes_region(r, p, ctx); + } + } +} + static bool damon_pa_filter_match(struct damon_filter *filter, struct folio *folio) { @@ -448,6 +482,7 @@ static int __init damon_pa_initcall(void) .update = NULL, .prepare_access_checks = damon_pa_prepare_access_checks, .check_accesses = damon_pa_check_accesses, + .prep_probes = damon_pa_prep_probes, .apply_probes = damon_pa_apply_probes, .target_valid = NULL, .apply_scheme = damon_pa_apply_scheme, -- 2.47.3