From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 440DB3ACF10; Sun, 6 Sep 2026 18:44:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788720266; cv=none; b=SQl9CbJwbPowud9xy8TqTwcljH3PTjKWUUK06jbMV/DbwEbyde7TbEV0a+APdGsAYnFDTpUllqj1pyYi011z8SUTvrPQdIowUzABvsyLX3ZVr3rRBPY8jDRr1EF51ZFpkBrJ7ZdnSavkmy0Jio/gE82cXASinp0TS9xwwFDCyO8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788720266; c=relaxed/simple; bh=fKrB/U0Fkc84EdTBQ6P2uNZCoUXlmjMlVMrrxMNAX2w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NCZ8z9v2PtAs7YkAPMJcSlVGtZFadMf4WFmTVXPrYjy2a4S+aE1yZtla6TvSXDqHT0JY9R/oPz0FqaxMcvGCN06RZOsJjUsYLXXDfCqAvuw3vuujQd1+2S12Uq5o1wRrXIbFu9qyB5wsz/SVWmqLixuHMG09XdklLOqm7uplQug= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=j8NOewHF; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="j8NOewHF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0F101F00A3E; Sun, 6 Sep 2026 18:44:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788720264; bh=jEjB5+SmYpe1jV4B6kvt1MmnXfzrPfDtBLhTiuYoc8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=j8NOewHFOLvGTEYMvInpqpNqWqgOutYCTrLtaJbMOQ0c6Kv+ulJX47s6aHjniDJf9 hGqEzySajML7VpB2LxEjY0rzYfF12PeIlBHsUtP98bth/cQDA4wWWVwrMQyXiD5+0n JX/PwHr0OxVKphCAsnkjA8tFlrgC495L3qwcvg/mbvaoFQn6dE03iv10sHABYB/Pia K7F2zp2RB9QZ/RrBHzvMp33QplPQHAOdtqMaAZmxz1DDmsKLcjot7sq9F5+xSBu21/ Jp7VEdAd8VWKYYkOaxiRjHyqPQJSEuvAwDE8bTECGzJCLPkQFXZbNQpPu9dYQzL411 OsnjI61STtyCg== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 1/5] mm/damon/vaddr: support prep_probes Date: Sun, 6 Sep 2026 11:44:11 -0700 Message-ID: <20260906184417.96621-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260906184417.96621-1-sj@kernel.org> References: <20260906184417.96621-1-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 DAMON virtual address space operation set (vaddr) is not supporting prep_probes. Add the support. Signed-off-by: SJ Park --- mm/damon/vaddr.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index af9e1b82454cc..20f4784f17817 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -483,6 +483,45 @@ static unsigned int damon_va_check_accesses(struct damon_ctx *ctx) return max_nr_accesses; } +static void damon_va_prep_probe_region(struct damon_ctx *ctx, + struct mm_struct *mm, struct damon_region *r, + struct damon_probe *probe) +{ + struct damon_prep *p; + + damon_for_each_prep(p, probe) { + switch (p->action) { + case DAMON_PREP_SET_PGIDLE: + damon_va_mkold(mm, r->sampling_addr); + break; + default: + break; + } + } +} + +static void damon_va_prep_probes(struct damon_ctx *ctx, bool set_samples) +{ + struct damon_target *t; + struct mm_struct *mm; + struct damon_region *r; + struct damon_probe *p; + + damon_for_each_target(t, ctx) { + mm = damon_get_mm(t); + if (!mm) + continue; + 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_va_prep_probe_region(ctx, mm, r, p); + } + mmput(mm); + } +} + static bool damos_va_filter_young_match(struct damos_filter *filter, struct folio *folio, struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pmd_t *pmdp) @@ -911,6 +950,7 @@ static int __init damon_va_initcall(void) .update = damon_va_update, .prepare_access_checks = damon_va_prepare_access_checks, .check_accesses = damon_va_check_accesses, + .prep_probes = damon_va_prep_probes, .target_valid = damon_va_target_valid, .cleanup_target = damon_va_cleanup_target, .apply_scheme = damon_va_apply_scheme, -- 2.47.3