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 4B124C5AD49 for ; Thu, 29 May 2025 11:33:46 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id B28DE6B0139; Thu, 29 May 2025 07:33:45 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id AB2366B013A; Thu, 29 May 2025 07:33:45 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9A0A86B013B; Thu, 29 May 2025 07:33:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 736E46B0139 for ; Thu, 29 May 2025 07:33:45 -0400 (EDT) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id E5201C0133 for ; Thu, 29 May 2025 11:33:44 +0000 (UTC) X-FDA: 83495735568.28.5CE2F4F Received: from mailout4.samsung.com (mailout4.samsung.com [203.254.224.34]) by imf16.hostedemail.com (Postfix) with ESMTP id DF928180003 for ; Thu, 29 May 2025 11:33:41 +0000 (UTC) Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=samsung.com header.s=mail20170921 header.b=Ts6YCJmj; dmarc=pass (policy=none) header.from=samsung.com; spf=pass (imf16.hostedemail.com: domain of kundan.kumar@samsung.com designates 203.254.224.34 as permitted sender) smtp.mailfrom=kundan.kumar@samsung.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1748518422; a=rsa-sha256; cv=none; b=lv97kNfmKsGvzHlOZ520ND85NLeesH9KcaiGGA1YMA0c0tQ5wFHNRa9aZwnRwbPUrpVgSg Y9dDtsVV6DgVLm+Zbubr8bI5JXQ8GSd5jKlHI2UFeIqmp8RUVLUY6BDYOdysgpETRRNTlL vCY+LaREkVp5k5kRZ9dcZOzM11P37XU= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=pass header.d=samsung.com header.s=mail20170921 header.b=Ts6YCJmj; dmarc=pass (policy=none) header.from=samsung.com; spf=pass (imf16.hostedemail.com: domain of kundan.kumar@samsung.com designates 203.254.224.34 as permitted sender) smtp.mailfrom=kundan.kumar@samsung.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1748518422; 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=y+nkfIOt+3+fBahE/FTnqxhgbR0oamTFyjGP5NPPufo=; b=s48k1ce6TQugngCWIx9YXiRjVNF84XonOHkbCvOe30f9tV8HsH//liT23rvws5bxyB7AZd ZuY++WOs0RSoPNit/3cuJHwEORRRYYRloaUwVt3Em+qrOVatSlur6Gqhd7GbPo/ju8rnO5 G9uyVKXZXbFvc0QLx8QDeAh+eLX6WpY= Received: from epcas5p3.samsung.com (unknown [182.195.41.41]) by mailout4.samsung.com (KnoxPortal) with ESMTP id 20250529113338epoutp049499e4fa646c4438a5a1a98b335792fc~D-DzUx-SB2607626076epoutp04D for ; Thu, 29 May 2025 11:33:38 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout4.samsung.com 20250529113338epoutp049499e4fa646c4438a5a1a98b335792fc~D-DzUx-SB2607626076epoutp04D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1748518418; bh=y+nkfIOt+3+fBahE/FTnqxhgbR0oamTFyjGP5NPPufo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ts6YCJmjPWjasO0VospUwjxr823S5DCJ0B/nK1nXpt8i+nYK1U+qsXOEVM8hd67Um QXLl5bxMflnDcLN74eUL4Y08XqYwiHBv4b06ElIqDdCid297crZaqYHpnyzzyqIY2y JrasquQ9L2o2lS0EhaqXd6xZI9j62DzNfez58xys= Received: from epsnrtp03.localdomain (unknown [182.195.42.155]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPS id 20250529113337epcas5p3f024c11a53bffeb67f7425b656519dc7~D-DyuRv7L3109531095epcas5p3L; Thu, 29 May 2025 11:33:37 +0000 (GMT) Received: from epcas5p2.samsung.com (unknown [182.195.38.174]) by epsnrtp03.localdomain (Postfix) with ESMTP id 4b7PQ808lcz3hhT7; Thu, 29 May 2025 11:33:36 +0000 (GMT) Received: from epsmtrp2.samsung.com (unknown [182.195.40.14]) by epcas5p4.samsung.com (KnoxPortal) with ESMTPA id 20250529113232epcas5p4e6f3b2f03d3a5f8fcaace3ddd03298d0~D-C11dWKS0832408324epcas5p4m; Thu, 29 May 2025 11:32:32 +0000 (GMT) Received: from epsmgmcp1.samsung.com (unknown [182.195.42.82]) by epsmtrp2.samsung.com (KnoxPortal) with ESMTP id 20250529113232epsmtrp2605620ed3bb7cb2547eb5f0a4dc89991~D-C10gkfG3187631876epsmtrp2N; Thu, 29 May 2025 11:32:32 +0000 (GMT) X-AuditID: b6c32a52-41dfa70000004c16-e4-683845d00f0d Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgmcp1.samsung.com (Symantec Messaging Gateway) with SMTP id 95.82.19478.0D548386; Thu, 29 May 2025 20:32:32 +0900 (KST) Received: from localhost.localdomain (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20250529113228epsmtip2fac518f078939caf5955dd6c606fa5b7~D-Cx_RSE_2424224242epsmtip2v; Thu, 29 May 2025 11:32:28 +0000 (GMT) From: Kundan Kumar To: jaegeuk@kernel.org, chao@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, miklos@szeredi.hu, agruenba@redhat.com, trondmy@kernel.org, anna@kernel.org, akpm@linux-foundation.org, willy@infradead.org, mcgrof@kernel.org, clm@meta.com, david@fromorbit.com, amir73il@gmail.com, axboe@kernel.dk, hch@lst.de, ritesh.list@gmail.com, djwong@kernel.org, dave@stgolabs.net, p.raghav@samsung.com, da.gomez@samsung.com Cc: linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, gfs2@lists.linux.dev, linux-nfs@vger.kernel.org, linux-mm@kvack.org, gost.dev@samsung.com, Kundan Kumar , Anuj Gupta Subject: [PATCH 04/13] writeback: affine inode to a writeback ctx within a bdi Date: Thu, 29 May 2025 16:44:55 +0530 Message-Id: <20250529111504.89912-5-kundan.kumar@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250529111504.89912-1-kundan.kumar@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrGIsWRmVeSWpSXmKPExsWy7bCSvO4FV4sMg56b4hbb1u1mt5izfg2b xYV1qxktWnf+Z7FomvCX2WL13X42i9eHPzFanJ56lsliyyV7i/eXtzFZrL65htFiy7F7jBaX n/BZ7J7+j9Xi5oGdTBYrVx9lspg9vZnJ4sn6WcwWW798ZbW4tMjdYs/ekywW99b8Z7W4cOA0 q8WNCU8ZLZ7t3shs8XlpC7vFwVMd7Baf5gINOf/3OKvF7x9z2BzkPE4tkvDYOesuu8fmFVoe l8+Wemxa1cnmsenTJHaPEzN+s3i82DyT0WP3gs9MHrtvNrB5nLtY4fF+31U2j74tqxg9ps6u 9ziz4Ai7x4ppF5kChKK4bFJSczLLUov07RK4Mvrf7mIp2M5dMeXuCfYGxuucXYycHBICJhI7 zzezdTFycQgJbGeUaHq1jAkiISOx++5OVghbWGLlv+fsEEUfGSUeNWwFSnBwsAnoSvxoCgWJ iwjcZJY4d/YMWAOzwD9Gid2vdEBsYQE/iW8t51hAbBYBVYkn19ewg9i8ArYSWx9+YYdYIC8x 89J3MJtTwE5i0ZKvjCC2EFDN0ptrWSDqBSVOznzCAjFfXqJ562zmCYwCs5CkZiFJLWBkWsUo mlpQnJuem1xgqFecmFtcmpeul5yfu4kRnBS0gnYwLlv/V+8QIxMH4yFGCQ5mJRHeJnuzDCHe lMTKqtSi/Pii0pzU4kOM0hwsSuK8yjmdKUIC6YklqdmpqQWpRTBZJg5OqQYmxpfaGhdVIziz TKao3eiztPVfdav36KOd9b6V83kzPh6OWi784W2iYkLX9XnCVw1YLUNqPrXU7nRhnx5s43/u w/s9d2vP+srpP2qW8N//K1Zn9dVFTE0cQo5+qZWOV6rqHJdJyzc2BCacVJ7ynf/4/4BTv9bf Xi91+HvHpZ7b0rU6bjtnrWm+5fB0t+q+Od31M+T7tQIl9uzaX7hKVs3DXXtB1gb+t02xoVNK 669F8dWEHT5oeuRToNYFL8XJAmsESlNDik8cbtJhX/z1RaVsxrv8pXZnuo8/0f82J85j89Lw aXMFUu/dL+59co9fRfCcfOs1p1xm+bU8bxfqVaW+X5i/s1OvfBnf7MPfzv5XYinOSDTUYi4q TgQA1ASJpnkDAAA= X-CMS-MailID: 20250529113232epcas5p4e6f3b2f03d3a5f8fcaace3ddd03298d0 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P cpgsPolicy: CPGSC10-542,Y X-CFilter-Loop: Reflected X-CMS-RootMailID: 20250529113232epcas5p4e6f3b2f03d3a5f8fcaace3ddd03298d0 References: <20250529111504.89912-1-kundan.kumar@samsung.com> X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: DF928180003 X-Stat-Signature: bc1ibubjto7x4pnahqu3mprjhm7r3k1d X-Rspam-User: X-HE-Tag: 1748518421-646769 X-HE-Meta: U2FsdGVkX19OtztEZAauE7eVOQ5wdbp2ZjNChyDwwxBlbKv6uLSSH1rpvOSLIQeaO+MFTCf285xqf4PIWpqRh6p7oJtR/bkbBOjUsDlkVwDVIryr2w4q5SEPIUvLJgAkQFAK43OfL3kRxb5I9FC1Jq/tAPrZg9aU9sQnqmdZY1uHWYZ5gBjBTpLvVS1NpjOkrYcLj2R2iFBaovRAVNFPT6yqrvYjeVgX4DHOGGapKId7sDoczJqOm/mw0LuxACd+aozqqJBb3yOrKv2oon+aCGPWL0/JR/jd9XmUb/8sDSOQa+15CQX43MJIoTWXNmbEB0YeAnXR8cFTa+WmaqVfFzSkT5EMQcc6BiEyNu9UNZDbGvosESy1R80yCBV5DGSxfm+yqw+XzbIZf5ECuumjNs0R5CAKydaGY25TgAyIg50PSPqUYDzCgtEsdwJ0Bzf9xgWRwZpzaVJj9OI76Tf/c41v2QNYqY+WPnTB6e8gAKGd+CDNWHXEBYpBhBwVwR6v+sfAM9zrAK5wbDfP9AWQF4bZnkB/WxjhAVLrWJ6D2rmXiFtOG1FfH+tuvDh3K6mumulLoURwnwBGJ6Oh+s1qjn9JNWHNLVik9IB/Fzned5eiOR7dIga10hH5X9WaD5fTxUJjpr5MwaABacBQhP5GwCv1iqMQbtyAMCpYWUiUokHzlxZozy1poHj3ORJkXuNibiXhPpYQQ8EfX/euzdxTUyWOGuB6FCS6DRwtHPkxNwqEVLyDJvctsW9JsYlow2mqyBz2LXp79HMmKA1Dmllu0M4cjXVtPF7ffJOcnXkOTzwk+UK5gzxnmMClTxozEEP5WqzTzrArIwPUvF5/LBrRTBJmE/8pOXX9aGgSmzs2e+crV/kHgy1lQtjTVcI1h1bNfn/lmeiRuAWgOpLPmEcvpiMgyQz9CYuPc4OrnLfPlUqWO/OrbbqWIz0hPpCgr38uCfjE2c62C6NvgRb6pvs 6y8z2xcl 5ic5WJ8unW/D3x5GKcIdJagw/g2I962Gx8JLg1pcR7j2fHvw7Y581Ao6uSgJMgZ5yDEEX 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: Affine inode to a writeback context. This helps in minimizing the filesytem fragmentation due to inode being processed by different threads. Signed-off-by: Kundan Kumar Signed-off-by: Anuj Gupta Suggested-by: Ritesh Harjani (IBM) --- fs/fs-writeback.c | 3 ++- include/linux/backing-dev.h | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 0959fff46235..9529e16c9b66 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -265,7 +265,8 @@ void __inode_attach_wb(struct inode *inode, struct folio *folio) { struct backing_dev_info *bdi = inode_to_bdi(inode); struct bdi_writeback *wb = NULL; - struct bdi_writeback_ctx *bdi_writeback_ctx = bdi->wb_ctx_arr[0]; + struct bdi_writeback_ctx *bdi_writeback_ctx = + fetch_bdi_writeback_ctx(inode); if (inode_cgwb_enabled(inode)) { struct cgroup_subsys_state *memcg_css; diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h index fbccb483e59c..30a812fbd488 100644 --- a/include/linux/backing-dev.h +++ b/include/linux/backing-dev.h @@ -157,7 +157,7 @@ fetch_bdi_writeback_ctx(struct inode *inode) { struct backing_dev_info *bdi = inode_to_bdi(inode); - return bdi->wb_ctx_arr[0]; + return bdi->wb_ctx_arr[inode->i_ino % bdi->nr_wb_ctx]; } #ifdef CONFIG_CGROUP_WRITEBACK -- 2.25.1