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 E67C3545D95; Wed, 9 Sep 2026 14:04:17 +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=1788962659; cv=none; b=pmUNDkefiUt83o46s6ZxKajDLh1zENIc7alTqLVXEMuJ4odv7xRwYkHJs8CYSqcPm9xglwwLxRmBG83zOn3QNyLyfnOy1xIsXzZ8EGH/6/ZdyFVR8bN0DqOFgmMFANd/ss2AhAYcIIwepmT/h/A5mik0zypOAEsoeLgJRBQcCLA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788962659; c=relaxed/simple; bh=6XNabZx0rdT/us2xD8F3Yx1aNqF1vaFNgfnZgADOfSk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YgGeIU29aH/hc4tLk4r1QdNS51pHwMaAFHA9uKqEWzDH+YDfwVGG2MY8LkSxnptrNQH2SILmTQ65tUZ60nKv5Pp0X+EFl0oRNnmnqQum1jTwfi0B5SBgCNIx/PyGf1D1d7IAa6k4s2LKcU7OkDV3mzUg3JVPAkQjjQOANQPv8Eg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=L2y1dlMu; 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="L2y1dlMu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0E3EC1F00ADF; Wed, 9 Sep 2026 14:04:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788962657; bh=ljZqDnomsr/PzAJ3OgMACOqJ7QipPXHSesCap1Ut72A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=L2y1dlMuE1ixFnYJgeWuEsNa0dHmIaaRkNfYW4OozjKIFHFiLRMh/P1LhSWsqnfns bMnpWg+MZ6hPnCLw3TLsTaIqAW0Ek3iPAcHqrz2r7SX7uEljBcquT53jY2ZbkGX3Wt 4haLBzVPRGdcmA1JFJ4ZxcJkX6ULPYWFF4BeW9scwBUJknirN1KDkhdmQwN4jkBjK+ sl69H66rhyAvRFtivWso31yMuxp4UwoSUcTbKa5VURMN8+WgV1jKiT7bV6eaXHfpDD MGdhFnZqLPt9yCUnr4ov4Z9d4OJbluXNWBpoWh1XBcsnzvKxsrFzbBdjJ0RxKsv+wd nVW+Y+BCH3Piw== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH REPOST 4/5] mm/damon/vaddr: extend apply_probes() for hugetlb Date: Wed, 9 Sep 2026 07:04:06 -0700 Message-ID: <20260909140408.104699-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260909140408.104699-1-sj@kernel.org> References: <20260909140408.104699-1-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