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 E1872375F82; Sat, 5 Sep 2026 20:26:43 +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=1788640006; cv=none; b=qOPJrZfVvhHnsyl5pU5LjfiOpivaZj8Ml+mwYqKUgWJ+Vcl5Y6aUM6UF6mtBiRivhiTM0OAecKmmp0S+FSUyyncPwhhqXp9TGy/FwdIQh2RvIYMbNvCRHqYi6SolNZT3xubwTKbVNvwQDm521UBMinSkt+/u2KHsaBpDlth/V2k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788640006; c=relaxed/simple; bh=fKrB/U0Fkc84EdTBQ6P2uNZCoUXlmjMlVMrrxMNAX2w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gdg5JTV6d7ZeyRicBcIoceNJtURmp414boUGnF/U+hRRs1YEH0opMBYljoX+0GPKHHd8BJ2c3QrFZXipbjDve0QCifqnf8ZUwLDXtqyOluKcmLhrazCSqGWkXTWWWn9JA/dSnFx7rSLwcWT9a6v6WmwsCWi3OUPAU8cbEsLPnvM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aX53b0wQ; 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="aX53b0wQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9EF641F00A3E; Sat, 5 Sep 2026 20:26:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788640003; bh=jEjB5+SmYpe1jV4B6kvt1MmnXfzrPfDtBLhTiuYoc8Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=aX53b0wQlWmkYH33AjzoghCYSwYeNkKyLh2Cp0TVS8FyKpcH1FzAdekysPBs664Pr Z+xxdn25A/jB8F3TT0bdqFB9LSVjOtrfTy6XrImNMNCZ6IpoazR68QQKItXFw1jy2T DYNy39vjaVZY3RrVHkcXknODXSG7EnrDOEfO4dZw8joN8MCIExapAX7a/CzVw5/cwi BEuttzVFQN6eRUtWmbdB7BmWTUKMUbHaBUKHfsMEf7cN2RN7s7ZeByqk4o3APXbG6j +io0Su9wnO0j99Mao0ugtSJidQZ2JCMHWyQg9VX/TAGQKSKsKB+rEFoCCJp5QMLyS5 ge4yG90ZNSZaQ== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH 1/5] mm/damon/vaddr: support prep_probes Date: Sat, 5 Sep 2026 13:26:23 -0700 Message-ID: <20260905202634.88102-2-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260905202634.88102-1-sj@kernel.org> References: <20260905202634.88102-1-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