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 D4E143A63EF; Sat, 5 Sep 2026 20:26:44 +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=1788640007; cv=none; b=AOH7EXRnPpYOUir/D9VC7l/ibH9RwAo1N+RQWXtvRz/V+1VNyjqLFWrEzYCKBmPZ9meY8YXznXyDmLKfTjxvK12maw36urAkSYS88SVlt0ueA0UGAximYlRmtAGEqHjs0ZV2oPTKGYIM24mmnZfzXImUathcsXrbbdvsVHNqIzk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788640007; c=relaxed/simple; bh=6XNabZx0rdT/us2xD8F3Yx1aNqF1vaFNgfnZgADOfSk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZTrY9dq2ke9VxUINVWiQxpSg9GjNxJalsEoey2XwD2O6SCFlV3FoIY6d8WMemPtxN8g/8rkP5jn2SdtC1/PxuG4CC8EJfyxEGDKx2GKBhc2pgRu4nx6wHBKrzxMHC0gAxPn94zipa9O+1BuB4kBiQyWr3Q9X9jfHL8okAivzq2c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XELRf4FU; 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="XELRf4FU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 96B591F00A3D; Sat, 5 Sep 2026 20:26:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788640004; bh=ljZqDnomsr/PzAJ3OgMACOqJ7QipPXHSesCap1Ut72A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=XELRf4FUAPre6yzEWl2c6/aeh5N/93qZx0vzARRXYRzgW4uThZBQHwN8ykfTwn/Ed 6sf+5Walh50v4Ew0nnhwoRDh7bFlp+OeLpYtIl1nSGIYaRU5UFGNZs7sUntx12/BZG Iv8pO3SkeL/2XjeJQSa5/wnr34PKCbu/PMsJw8L0f4wmY0q4O2dJ0R6limZ2d4kgaj ksbdHFPI6PZkUHbWca4XE+QhhqMro5iuvLAMhlMNqhwlxUfzSte3XSh9uQ3280GYBz g6PLd5YDXIYeBxd0woGysm21P5Kz1vHxwO5LfYScELTGrCbjLVZQYMXx5dGQoHHzy9 gF7uC82LlAv6w== 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 4/5] mm/damon/vaddr: extend apply_probes() for hugetlb Date: Sat, 5 Sep 2026 13:26:26 -0700 Message-ID: <20260905202634.88102-5-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) does not support hugetlb pages in apply_probes. Extend it for hugetlb pages. Signed-off-by: SJ Park --- mm/damon/vaddr.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c index 7c548ec0cf6b5..45239f05e113b 100644 --- a/mm/damon/vaddr.c +++ b/mm/damon/vaddr.c @@ -598,6 +598,34 @@ static int damon_va_probe_pmd_entry(pmd_t *pmd, unsigned long addr, return 0; } +#ifdef CONFIG_HUGETLB_PAGE +static int damon_va_probe_hugetlb_entry(pte_t *pte, unsigned long hmask, + unsigned long addr, unsigned long end, struct mm_walk *walk) +{ + struct damon_va_probe_walk_private *priv = walk->private; + struct hstate *h = hstate_vma(walk->vma); + struct folio *folio; + spinlock_t *ptl; + pte_t entry; + + ptl = huge_pte_lock(h, walk->mm, pte); + entry = huge_ptep_get(walk->mm, addr, pte); + if (!pte_present(entry)) + goto out; + + folio = pfn_folio(pte_pfn(entry)); + folio_get(folio); + damon_va_probe_folio(priv->ctx, priv->r, folio); + folio_put(folio); + +out: + spin_unlock(ptl); + return 0; +} +#else +#define damon_va_probe_hugetlb_entry NULL +#endif /* CONFIG_HUGETLB_PAGE */ + static void __damon_va_apply_probes(struct damon_ctx *ctx, struct mm_struct *mm, struct damon_region *r) { @@ -607,7 +635,7 @@ static void __damon_va_apply_probes(struct damon_ctx *ctx, }; struct mm_walk_ops damon_probe_walk_ops = { .pmd_entry = damon_va_probe_pmd_entry, - .hugetlb_entry = NULL, + .hugetlb_entry = damon_va_probe_hugetlb_entry, }; unsigned long addr = r->sampling_addr; -- 2.47.3