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 3476B3C3C0F; 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=1788720267; cv=none; b=HKY6zW5F1bvslQQc6ubsta/9l/zy7zmg27QhF3JrC/6HEek6pfioxNQF1atBkOpSnvATnCXlJsKPy37BGLPVvi89GsjcqUQ38WnyFidIbx7EzvuwXGDvc3DPJYaWE0U9VL3DwYkMM+w/Jl3WdNpG3+g963N9Cxb8t5rDJZjDSN0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788720267; c=relaxed/simple; bh=6XNabZx0rdT/us2xD8F3Yx1aNqF1vaFNgfnZgADOfSk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iq/cp5p4c2vBcYCvtCJTMxC8c2BXAgFEA2Wf3Xy60StpJCLFoyDiTp5wgoDXdDbvkUrlO+LsFY8Bcgp+A6E1/4Sq7u/0ragpelVpET0Ocb6LSSycwROkb+Axh0tYyhpnpBoY8h9RG86xwpVyq4rh3BJ66YyhjYKMO6HZr1+Qv8c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=UQbWV+hl; 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="UQbWV+hl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2E3C1F00ACA; Sun, 6 Sep 2026 18:44:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788720265; bh=ljZqDnomsr/PzAJ3OgMACOqJ7QipPXHSesCap1Ut72A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=UQbWV+hlw1vP2O5XL/zZT6lPjnNM7O1MsGOLh72/QmjDPEoUvAjuL2kB2yemHuDuX htZe3KwQFoIAto4At5KPdjdhTcdaW41ZBRdGx0gundK+lsNHissbNMzSHFYYdKO/nM NEV2lzx5az1U+YdCQxefM9AofJxPVczIKLH8lOG9UWBxrJ0Z3KX13sZhlLqcf6tcCF 4INaBVaMJSBU5BsslNSFCdTZsdeYhACYdMdUTCZfw6KT+5kiEeeXSckmSsmYOEEOgQ 9G0qcI318d3dTsDT8Nq8RtJHDLz19aChc1GL5hjdF1kfyTdUf9larTwQLElO3v/SvB z5aSLBSzbGT9w== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 4/5] mm/damon/vaddr: extend apply_probes() for hugetlb Date: Sun, 6 Sep 2026 11:44:14 -0700 Message-ID: <20260906184417.96621-5-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) 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