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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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 8C695140006 X-Stat-Signature: 79kjmqi8obappzzd4fhg7wa3w919gcg3 X-HE-Tag: 1788720266-736038 X-HE-Meta: U2FsdGVkX1/5y5MrlmRyg/4jowRZs/Cw1H0RflVexY3iM8MX28J3okwyRBuwcQf3YvwKpb93+fexcJ8fXs6ZxKZ6GSRoYnYYJ+7ze255SeQqwh4RGPRRcHUFBnX1p3tOFfopm+NY0YaevJhNYtftMMntJUC+e3ND082jRB7dQohges2mmB9LP+fYTLSshi3diRD4YUirnMVaiNi/Y3rYNTaH9gjUZ5UxaFYlu3EVdd92cmas2Yeg401XuQ/2c0fD1WaSLFezlpj6i4pG4JvVR5yveQTAubEmTFRZZi/X1I92Gtybn37Bc/VBRLwhK2O8LOc1XwUV7YT6HPeLy9AZboa32Z+El0ug5zJ7DK5kVq2rEzDoGUHGjlqERIB+J7socYqosQMUPv3i7th0v85Q5yW30567j+3oSNKwcvSMU7F1t/cqY4g+q6CiyAc5KYcrNUjls/kSbQ1Z7KEyQzYYJ6LygdKBsWLnOXqIN1f7ZRH2UcpkXCVaKZ19BWrvZDoaVVOXbrDZN04IN4uFWAkBuhYh+uS1nNaeOXE6c1yDfEY5D5bM5RcCqZozXEVcXgmWEVWVL+Si91nBFSDNMobubkzzgwLJd2TiLIPwgOQeLr5pKg2o/+YvvGYVeKvL4AXJfvp7OS1zoRsKY8co6OT8CyNpxOOM0Q7DlRGKnXyks0pk+FJryHNMs6JYMZNRNv1TKFZPO4dcjUJMvhXmbm8Mo6QddlY4FvDOTu1Y18JgHvVIZSIBDxZ7cAw/LsulhROfQJZIAedsEuR7X60iTModHzwvdmaKFabDep4bl5YWh2VgGE8AQ1o5XP9mr2iY5HIwLuurbhIbatzZlKS9y3RqeymOezIpv59hJZmRMo57iiZK5//ELJOOQn7RgTpD2vMkm9tlEwA+QE1i1kHoQTC4mw6eRUst22YVdphvUaqXt7wQXeMd0CCT3u1bEmIJe/ETqHh7S9TlSB+UcKtW5ro FE5F6Jpc lzbGHTZskVkqs04UOV4U7fQCahTqT9bjcEmnigT+GhGF6ctqD1HrzENBYyx8jj8xGGAJMWGqH9Z2VcJvsP+KFRCYHa+7+0CuQlIu+tZA+BBekJdFolsVBXbr1XSs7FyaHC4IZFFOdn/6DCtr/4lUr1CsmqVkmNurQgcbxMPAkdZjFKwAtQMOCvMwCHeuZ8/zfdD+ARha1dAseJG2AsO3u8VF6RwBjXfpHnTTyw6QjflgVOPMvvOWsyI/jTan2fBR2o0dZXF6TOhqjSONy225DAymCrw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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