From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3D045C25B75 for ; Wed, 15 May 2024 05:57:39 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 384206B010B; Wed, 15 May 2024 01:57:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 331526B010D; Wed, 15 May 2024 01:57:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 013566B03D0; Wed, 15 May 2024 01:57:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id DA30C6B03CE for ; Wed, 15 May 2024 01:57:33 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 7E891403F2 for ; Wed, 15 May 2024 05:57:33 +0000 (UTC) X-FDA: 82119573186.20.4BC76CC Received: from mailout2.w1.samsung.com (mailout2.w1.samsung.com [210.118.77.12]) by imf15.hostedemail.com (Postfix) with ESMTP id 2A459A000A for ; Wed, 15 May 2024 05:57:29 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=samsung.com header.s=mail20170921 header.b=q4A3cBzV; spf=pass (imf15.hostedemail.com: domain of da.gomez@samsung.com designates 210.118.77.12 as permitted sender) smtp.mailfrom=da.gomez@samsung.com; dmarc=pass (policy=none) header.from=samsung.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1715752650; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=seKa6sjLynK9cdKjqPABBz7tIQiUkhLa6rE9aIXSk0U=; b=wVa7zW0FvM7pG2PAozIHfI9TQAerGxZ73Vd+8zki7l+HlpceGyY1MlgtplOEFFSX8FxLQ3 f1bKXl0hGXa9XUZud1CwM237+Z7SJ7E3W4bRm1zvaHnRXrdYZTtmawKmunmYyZHxq9KZvU XVx2QoRV1UsI2zZex5ChY4o2Ns0Pu0k= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=samsung.com header.s=mail20170921 header.b=q4A3cBzV; spf=pass (imf15.hostedemail.com: domain of da.gomez@samsung.com designates 210.118.77.12 as permitted sender) smtp.mailfrom=da.gomez@samsung.com; dmarc=pass (policy=none) header.from=samsung.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1715752650; a=rsa-sha256; cv=none; b=KVCB2A6cvKm+ITtufHfdXBVu/eKo7nPZFSmBV/Ze9aPTfIzTcAwLMflsC8UaELEVznmXPI SftCuTQJ26XCNACX/3SFX9YpHhsQ+GquO5YUshWs2Nk0aGRuhfxmc93g5eyOcDvRfMgFEg okKRCtVjEnkVYRh0OlTLD2kSXnWlJUQ= Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout2.w1.samsung.com (KnoxPortal) with ESMTP id 20240515055727euoutp02e89172cfb60de710a73d3930cc909aff~Pk-FiJmEr1334513345euoutp02O for ; Wed, 15 May 2024 05:57:27 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout2.w1.samsung.com 20240515055727euoutp02e89172cfb60de710a73d3930cc909aff~Pk-FiJmEr1334513345euoutp02O DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1715752648; bh=seKa6sjLynK9cdKjqPABBz7tIQiUkhLa6rE9aIXSk0U=; h=From:To:CC:Subject:Date:In-Reply-To:References:From; b=q4A3cBzVn9KE2ydc+PwPCpAz6s/hUrGumb4IqYJW7f4Ed9Y3y7Eg2TL0CNMlxnV+N aV/2w1EHQIxJYkiie0OXg73ruCyKvawmsL0Qa8iNP1M+YkbXf1ybCmfIGNQb360oDW 8fRKS8sJ+PtJ9+0mqjKHY9TJhGyK9/GrYMbiDH1M= Received: from eusmges1new.samsung.com (unknown [203.254.199.242]) by eucas1p1.samsung.com (KnoxPortal) with ESMTP id 20240515055727eucas1p1cce4046f8f5533c6eea17fae56ae77c7~Pk-FRrwRp2649226492eucas1p1m; Wed, 15 May 2024 05:57:27 +0000 (GMT) Received: from eucas1p2.samsung.com ( [182.198.249.207]) by eusmges1new.samsung.com (EUCPMTA) with SMTP id 48.BC.09624.7CE44466; Wed, 15 May 2024 06:57:27 +0100 (BST) Received: from eusmtrp1.samsung.com (unknown [182.198.249.138]) by eucas1p2.samsung.com (KnoxPortal) with ESMTPA id 20240515055727eucas1p2413c65b8b227ac0c6007b4600574abd8~Pk-E2YLc31177811778eucas1p2O; Wed, 15 May 2024 05:57:27 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20240515055727eusmtrp12a11692dcfa90fab16fe695c42ed0ffa~Pk-E1UwJs0390703907eusmtrp1z; Wed, 15 May 2024 05:57:27 +0000 (GMT) X-AuditID: cbfec7f2-c11ff70000002598-4f-66444ec7cb92 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id E6.F1.09010.7CE44466; Wed, 15 May 2024 06:57:27 +0100 (BST) Received: from CAMSVWEXC01.scsc.local (unknown [106.1.227.71]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20240515055727eusmtip2fc68020aac0eb188bacb160d886bb72a~Pk-EpQJBJ1596015960eusmtip2L; Wed, 15 May 2024 05:57:27 +0000 (GMT) Received: from CAMSVWEXC02.scsc.local (2002:6a01:e348::6a01:e348) by CAMSVWEXC01.scsc.local (2002:6a01:e347::6a01:e347) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 15 May 2024 06:57:26 +0100 Received: from CAMSVWEXC02.scsc.local ([::1]) by CAMSVWEXC02.scsc.local ([fe80::3c08:6c51:fa0a:6384%13]) with mapi id 15.00.1497.012; Wed, 15 May 2024 06:57:26 +0100 From: Daniel Gomez To: "hughd@google.com" , "akpm@linux-foundation.org" , "willy@infradead.org" , "jack@suse.cz" , "mcgrof@kernel.org" CC: "linux-mm@kvack.org" , "linux-xfs@vger.kernel.org" , "djwong@kernel.org" , "Pankaj Raghav" , "dagmcr@gmail.com" , "yosryahmed@google.com" , "baolin.wang@linux.alibaba.com" , "ritesh.list@gmail.com" , "lsf-pc@lists.linux-foundation.org" , "david@redhat.com" , "chandan.babu@oracle.com" , "linux-kernel@vger.kernel.org" , "brauner@kernel.org" , Daniel Gomez Subject: [PATCH 03/12] shmem: move folio zero operation to write_begin() Thread-Topic: [PATCH 03/12] shmem: move folio zero operation to write_begin() Thread-Index: AQHapozDwSlh4G2vDEmdcsveZO13yA== Date: Wed, 15 May 2024 05:57:25 +0000 Message-ID: <20240515055719.32577-4-da.gomez@samsung.com> In-Reply-To: <20240515055719.32577-1-da.gomez@samsung.com> Accept-Language: en-US, en-GB Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [106.210.248.161] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrEKsWRmVeSWpSXmKPExsWy7djP87rH/VzSDOZeUrGYs34Nm8X/vccY LV4f/sRocemonMXZvt9sFl/X/2K2uPyEz+Lppz4Wi9nTm5ksLu+aw2Zxb81/Votdf3awW+x7 vZfZ4saEp4wWB091sFv8/gGU3b4r0kHQY+esu+weCzaVemxeoeWxaVUnm8emT5PYPU7M+M3i sfOhpcfkG8sZPT4+vcXi8X7fVTaPMwuOsHt83iQXwBPFZZOSmpNZllqkb5fAlXHrzD+mgueC FZt/LWNsYLzP18XIySEhYCLxYsNC5i5GLg4hgRWMEjPaFrGBJIQEvjBK9J2QhEh8ZpR4N+U0 M0zH8uYLUEXLGSV+n+KCK5r7azMjhHOGUWLOoh9QzkpGiXtvbrCCtLAJaErsO7mJHSQhInCb UeLpqTNgDrPASVaJP5t3soBUCQt4SKz79gKsQ0TAX2LHs1dMELaexJELC8GWswioSkxd9wfs KF4BS4kPi/8zgticAlYSd+d/BathFJCVeLTyFzuIzSwgLnHryXwmiCcEJRbN3gP1kJjEv10P 2SBsHYmz158wQtgGEluX7mOBsJUl1r9rY4KYoydxY+oUNghbW2LZwtdQNwhKnJz5hAXkGQmB nVwS92+3QC1zkdjway3UAmGJV8e3sEPYMhKnJ/ewTGDUnoXkvllIdsxCsmMWkh0LGFlWMYqn lhbnpqcWG+allusVJ+YWl+al6yXn525iBCbL0/+Of9rBOPfVR71DjEwcjIcYJTiYlUR4RdKc 04R4UxIrq1KL8uOLSnNSiw8xSnOwKInzqqbIpwoJpCeWpGanphakFsFkmTg4pRqYmCYlvmqf 2BX/pKslgLO6o3D+ueP/jUIWslu7zrafwJwVIyN3+5Xdwo3MzForZyTs1PqUvzrn0Vr9uTrq Xr2zzJScuravuZKjYJPMZtBx8tBRj6ZamfW3pj070K5R93kWB4+AXtIza7WnsY6Pzit5BDG8 mJxxZfqLKlfPCAmvaUa7Z6+IfXxmW3DNDtUJ3+989vwSbCk//37y2n034uOZHZRqXTZsN8yb /ForqPfdnG95fk0v/2Y25m45cJAnsXr1OoVlb84Kd54uOPElTm3PkY/X1bu4Vh67vKPN9dTB vTHvi1rao/k7/A0Z7Ot4g92P1AizfOrZfzGmsKBFa/PGlk2H7wS4qS1+W6+ya91eJZbijERD Leai4kQA+VA/VwUEAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrPKsWRmVeSWpSXmKPExsVy+t/xe7rH/VzSDF4e4rSYs34Nm8X/vccY LV4f/sRocemonMXZvt9sFl/X/2K2uPyEz+Lppz4Wi9nTm5ksLu+aw2Zxb81/Votdf3awW+x7 vZfZ4saEp4wWB091sFv8/gGU3b4r0kHQY+esu+weCzaVemxeoeWxaVUnm8emT5PYPU7M+M3i sfOhpcfkG8sZPT4+vcXi8X7fVTaPMwuOsHt83iQXwBOlZ1OUX1qSqpCRX1xiqxRtaGGkZ2hp oWdkYqlnaGwea2VkqqRvZ5OSmpNZllqkb5egl3HrzD+mgueCFZt/LWNsYLzP18XIySEhYCKx vPkCWxcjF4eQwFJGid72uUwQCRmJjV+uskLYwhJ/rnVBFX1klHj1eyIzhHOGUeLPpkZWCGcl o8Tpno9sIC1sApoS+05uYgdJiAjcZpR4euoMmMMscJJV4sDpz+wgVcICHhLrvr0AWyIi4Cux cstfFghbT+LIhYVgk1gEVCWmrvvDDGLzClhKfFj8nxHEFgKyL73aDmZzClhJ3J3/FayeUUBW 4tHKX2DzmQXEJW49mQ/1kIDEkj3nmSFsUYmXj/9BPacjcfb6E0YI20Bi69J9LBC2ssT6d21M EHP0JG5MncIGYWtLLFv4GuoeQYmTM5+wTGCUnoVk3SwkLbOQtMxC0rKAkWUVo0hqaXFuem6x kV5xYm5xaV66XnJ+7iZGYMrbduznlh2MK1991DvEyMTBeIhRgoNZSYRXJM05TYg3JbGyKrUo P76oNCe1+BCjKTCMJjJLiSbnA5NuXkm8oZmBqaGJmaWBqaWZsZI4r2dBR6KQQHpiSWp2ampB ahFMHxMHp1QDU7DFr4ynt03ZQ3pmz/l8xSdR4nEwv8OhrRldjYnsFks9VMR7Hk6Tnrt5kuTy v/wd/51LljyQmLDNyX6lY+KDpPiq3fx/nc9N8bMP4LitsN2qvfzDPF4RVpWaG1P6tzziVI10 eyT/R5DzT8oPXdEj0zZwMR14JndEe6Hw+RcbJrqWzWDyu3TJ6MW0Po3MeI/G2mSNC5FuUhtO NK7lWZ0nnPnwfkco55RkbUau8OKNkRm9mxfafH8SkX0vYAVX/3TuujN3V0Q+f/n1M//Nizlx uw6cqV0sGN8dLJjAMmWxPqdXvAvf77AdzSuVFhn/Tp5xq2JLq1GlQ4iPQvRDnb/VShvXRztM Xy48YU+l0b56JZbijERDLeai4kQAdnZNzAIEAAA= X-CMS-MailID: 20240515055727eucas1p2413c65b8b227ac0c6007b4600574abd8 X-Msg-Generator: CA X-RootMTR: 20240515055727eucas1p2413c65b8b227ac0c6007b4600574abd8 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20240515055727eucas1p2413c65b8b227ac0c6007b4600574abd8 References: <20240515055719.32577-1-da.gomez@samsung.com> X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 2A459A000A X-Stat-Signature: w4f4e1kewax8zax5wsy1ngsgp17j8x5s X-HE-Tag: 1715752649-956496 X-HE-Meta: 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 xjdXQfyx SIBpG2IK0kUixxmPy6faKeZHEt4Gzo6mhe08kju6j2jGwGW3FROX2lkqfjQMAOGIYaUkI6GOC5Hmfa4mgsvkSDsGdJ2uo0RDBFvYrvg//fbrp9SLvw4KryiSX7RxUgNsqduOPRVtULxoWLemIdZbe2rNwhv8/ox+Ij6xPgMFH2OuLsH7NBrL7KHC4ifWuFjWM1AKclNtYt+ZIip0h/dPg1O8uCsvLQrhJDFDIcrng7NxJUzAJJD701xsEZ1cPmVp0dZ/BQlPgA/8scg/2zlRm5OJ004RFj/GQxKwz X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Simplify zero out operation by moving it from write_end() to the write_begin(). If a large folio does not have any block uptodate when we first get it, zero it out entirely. Signed-off-by: Daniel Gomez --- mm/shmem.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/mm/shmem.c b/mm/shmem.c index 4818f9fbd328..86ad539b6a0f 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -149,6 +149,14 @@ static inline bool sfs_is_fully_uptodate(struct folio = *folio) return bitmap_full(sfs->state, i_blocks_per_folio(inode, folio)); } =20 +static inline bool sfs_is_any_uptodate(struct folio *folio) +{ + struct inode *inode =3D folio->mapping->host; + struct shmem_folio_state *sfs =3D folio->private; + + return !bitmap_empty(sfs->state, i_blocks_per_folio(inode, folio)); +} + static inline bool sfs_is_block_uptodate(struct shmem_folio_state *sfs, unsigned int block) { @@ -239,6 +247,15 @@ static void sfs_free(struct folio *folio, bool force) kfree(folio_detach_private(folio)); } =20 +static inline bool shmem_is_any_uptodate(struct folio *folio) +{ + struct shmem_folio_state *sfs =3D folio->private; + + if (folio_test_large(folio) && sfs) + return sfs_is_any_uptodate(folio); + return folio_test_uptodate(folio); +} + static void shmem_set_range_uptodate(struct folio *folio, size_t off, size_t len) { @@ -2872,6 +2889,9 @@ shmem_write_begin(struct file *file, struct address_s= pace *mapping, if (ret) return ret; =20 + if (!shmem_is_any_uptodate(folio)) + folio_zero_range(folio, 0, folio_size(folio)); + *pagep =3D folio_file_page(folio, index); if (PageHWPoison(*pagep)) { folio_unlock(folio); @@ -2894,13 +2914,6 @@ shmem_write_end(struct file *file, struct address_sp= ace *mapping, if (pos + copied > inode->i_size) i_size_write(inode, pos + copied); =20 - if (!folio_test_uptodate(folio)) { - if (copied < folio_size(folio)) { - size_t from =3D offset_in_folio(folio, pos); - folio_zero_segments(folio, 0, from, - from + copied, folio_size(folio)); - } - } shmem_set_range_uptodate(folio, 0, folio_size(folio)); folio_mark_dirty(folio); folio_unlock(folio); --=20 2.43.0