From nobody Mon Feb 9 07:11:20 2026 Received: from relayaws-01.paragon-software.com (relayaws-01.paragon-software.com [35.157.23.187]) (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 61E3C245020; Fri, 26 Dec 2025 17:43:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=35.157.23.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766771011; cv=none; b=rmztD891aokpNYVrmTj0JNKYMl+fcLzNM4iB/jAnCrg1hsqSu3rnkruMxh7HyNQzIYei0lJ+yOpdd5KdlFHzjlilx0aJnkcPcLuFRvzR4KgCm2iJQ3wMEtqmlL66VSFoB+G7yIS92kOAzydXnIRf3bPxTOacByh/h5zHABHEDnU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766771011; c=relaxed/simple; bh=xFEeWeWR3+IeCOZe2kO6e6pmsusoXLogDMrmzCK0nUE=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=XW75eY22zGYzJxlNw7Ybqsnib+YIa7mX9ZWsPfFUOfE4WZgJqyWMKGJvsTZbjXpyJXyrSDilzPW0kCVspYiKBM+Lr9YuCa9qSPW3/txCI3x3SRrPcrrUneloPVK3SgSbcGOSjsHIZVF05nSXccO2FxgxDoVMfLZe7bewvjwgLUA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=paragon-software.com; spf=pass smtp.mailfrom=paragon-software.com; dkim=pass (1024-bit key) header.d=paragon-software.com header.i=@paragon-software.com header.b=ehm53CMR; arc=none smtp.client-ip=35.157.23.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=paragon-software.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=paragon-software.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=paragon-software.com header.i=@paragon-software.com header.b="ehm53CMR" Received: from relayfre-01.paragon-software.com (unknown [176.12.100.13]) by relayaws-01.paragon-software.com (Postfix) with ESMTPS id 50B161D1D; Fri, 26 Dec 2025 17:40:19 +0000 (UTC) Authentication-Results: relayaws-01.paragon-software.com; dkim=pass (1024-bit key; unprotected) header.d=paragon-software.com header.i=@paragon-software.com header.b=ehm53CMR; dkim-atps=neutral Received: from dlg2.mail.paragon-software.com (vdlg-exch-02.paragon-software.com [172.30.1.105]) by relayfre-01.paragon-software.com (Postfix) with ESMTPS id 98FA32267; Fri, 26 Dec 2025 17:43:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=paragon-software.com; s=mail; t=1766771007; bh=U92v8ZLmSxuCCgcK3nfja+cZW+fYx8Wdi27Vm0CmqN8=; h=From:To:CC:Subject:Date; b=ehm53CMRAESqiWhzlB2mC7LaG6OO6L/Y9Qbnyin1tJgcQy+MnXorQxsISdNgQOECw MA+oT8qP3yWJtym4nZzp/Kf0rzlNGNFFvNjFmrQb7rRNJ5o59yDPDr/SrUhrRI0uI6 z4Z/QlM8UFb5x/dAqpmjVCeOmdQyuCpMVSgM0wKI= Received: from localhost.localdomain (172.30.20.178) by vdlg-exch-02.paragon-software.com (172.30.1.105) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.7; Fri, 26 Dec 2025 20:43:26 +0300 From: Konstantin Komarov To: CC: , , Konstantin Komarov Subject: [PATCH] fs/ntfs3: zero-fill folios beyond i_valid in ntfs_read_folio() Date: Fri, 26 Dec 2025 18:43:16 +0100 Message-ID: <20251226174317.15884-1-almaz.alexandrovich@paragon-software.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: vobn-exch-01.paragon-software.com (172.30.72.13) To vdlg-exch-02.paragon-software.com (172.30.1.105) Content-Type: text/plain; charset="utf-8" Handle ntfs_read_folio() early when the folio offset is beyond i_valid by zero-filling the folio and marking it uptodate. This avoids needless I/O and locking, improves read performance. Signed-off-by: Konstantin Komarov --- fs/ntfs3/inode.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index 1319b99dfeb4..ace9873adaae 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -723,6 +723,19 @@ static int ntfs_read_folio(struct file *file, struct f= olio *folio) struct address_space *mapping =3D folio->mapping; struct inode *inode =3D mapping->host; struct ntfs_inode *ni =3D ntfs_i(inode); + loff_t vbo =3D folio_pos(folio); + + if (unlikely(is_bad_ni(ni))) { + folio_unlock(folio); + return -EIO; + } + + if (ni->i_valid <=3D vbo) { + folio_zero_range(folio, 0, folio_size(folio)); + folio_mark_uptodate(folio); + folio_unlock(folio); + return 0; + } =20 if (is_resident(ni)) { ni_lock(ni); --=20 2.43.0