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 1FC1BC001DE for ; Wed, 26 Jul 2023 07:46:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9199C6B0071; Wed, 26 Jul 2023 03:46:19 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 8A30A6B0074; Wed, 26 Jul 2023 03:46:19 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 76B806B0075; Wed, 26 Jul 2023 03:46:19 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 652A26B0071 for ; Wed, 26 Jul 2023 03:46:19 -0400 (EDT) Received: from smtpin15.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 2B7A51C9BA6 for ; Wed, 26 Jul 2023 07:46:19 +0000 (UTC) X-FDA: 81052980078.15.3C3E99E Received: from out-30.mta0.migadu.com (out-30.mta0.migadu.com [91.218.175.30]) by imf03.hostedemail.com (Postfix) with ESMTP id 5AEC22000A for ; Wed, 26 Jul 2023 07:46:17 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=PIFD02mp; spf=pass (imf03.hostedemail.com: domain of muchun.song@linux.dev designates 91.218.175.30 as permitted sender) smtp.mailfrom=muchun.song@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1690357577; 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=6QEBEdTPSAaW2OQqcLE7rLGuRZIVN6+LeTsJ4l/CyeM=; b=PYo44zZKmeHc9CXswuknOIH1l2aUyxQGutd4AZhlWEssV8hyBcA4lIxiyz0O0dH17yUI2I 6SGiV+tI6QKVhIsro0UZqdZ7a7SXgB22SoEK8wQksmE0rd3gM6mEI25RhH1fTyHbQULwCW oWG44y1s6SNzdpJaSjeDPpyFAaEq/VQ= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1690357577; a=rsa-sha256; cv=none; b=qjffO9GjdNMHIxtc0/iIoViUVwqB21UyJOe40aEaOaovSQqv07Y8oCzt+8cSLFPKCVSG3h zd0AIjyhO/grcLnVjKwjGBDwwCvxRMV9aONPmW+WwlTWu0r6pAfTUkTLKk+Aca5SOp4bfK 9e0VCGTYGKC3FOR95aq2fWb4hRyMFr4= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=PIFD02mp; spf=pass (imf03.hostedemail.com: domain of muchun.song@linux.dev designates 91.218.175.30 as permitted sender) smtp.mailfrom=muchun.song@linux.dev; dmarc=pass (policy=none) header.from=linux.dev Message-ID: <2eb5ac60-d03f-c770-144c-67c23337a899@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1690357574; h=from:from: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; bh=6QEBEdTPSAaW2OQqcLE7rLGuRZIVN6+LeTsJ4l/CyeM=; b=PIFD02mpMzjRcZ3366WsMtp53hA717Gy3vvuYw5Rhd/AopVnoI+xS2zEoD80dtXmig5iVU e+udj9BpG++3X4I7Xha4OWZFfxbVXmw3wbp6r/NHzIwAOXaSD+OnSfxRqvRN624pP6oj8J xGsejw6XWW8uEiG+p7ecCRE5blMqFKA= Date: Wed, 26 Jul 2023 15:45:56 +0800 MIME-Version: 1.0 Subject: Re: [PATCH v2 40/47] fs: super: dynamically allocate the s_shrink To: Qi Zheng Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, linux-erofs@lists.ozlabs.org, linux-f2fs-devel@lists.sourceforge.net, cluster-devel@redhat.com, linux-nfs@vger.kernel.org, linux-mtd@lists.infradead.org, rcu@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, linux-bcache@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, akpm@linux-foundation.org, david@fromorbit.com, tkhai@ya.ru, vbabka@suse.cz, roman.gushchin@linux.dev, djwong@kernel.org, brauner@kernel.org, paulmck@kernel.org, tytso@mit.edu, steven.price@arm.com, cel@kernel.org, senozhatsky@chromium.org, yujie.liu@intel.com, gregkh@linuxfoundation.org References: <20230724094354.90817-1-zhengqi.arch@bytedance.com> <20230724094354.90817-41-zhengqi.arch@bytedance.com> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Muchun Song In-Reply-To: <20230724094354.90817-41-zhengqi.arch@bytedance.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 5AEC22000A X-Rspam-User: X-Stat-Signature: ojox9ptoscez1emu979daqcxd656696f X-Rspamd-Server: rspam03 X-HE-Tag: 1690357577-307788 X-HE-Meta: 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 HgX1awzA l+VWEXRqxEuVjK5Tm70VvTUg3eGpIq8lYJWa19uqgRBPV3LTTa2gVe/wqM5wvGjbPCNbnQVgb3eZBxGJFxXXctkEYbwIIt9SeVPfYp0qbSQBSUgccoAUnllozurw5lnmww8r0g+x4YPHhumcbVaycMRKv4CmD5rROKUZwoLUCzZKbyBt8rd6jTjogU62bFSDxWHgfyppMKmDR7iA= 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: On 2023/7/24 17:43, Qi Zheng wrote: > In preparation for implementing lockless slab shrink, use new APIs to > dynamically allocate the s_shrink, so that it can be freed asynchronously > using kfree_rcu(). Then it doesn't need to wait for RCU read-side critical > section when releasing the struct super_block. > > Signed-off-by: Qi Zheng Reviewed-by: Muchun Song