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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 845F7C001DF for ; Tue, 25 Jul 2023 07:19:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 15CC510E39D; Tue, 25 Jul 2023 07:19:10 +0000 (UTC) X-Greylist: delayed 538 seconds by postgrey-1.36 at gabe; Tue, 25 Jul 2023 03:27:16 UTC Received: from out-20.mta0.migadu.com (out-20.mta0.migadu.com [91.218.175.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id B73F310E150 for ; Tue, 25 Jul 2023 03:27:16 +0000 (UTC) Content-Type: text/plain; charset=us-ascii DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1690255094; 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=keHNwQXyGxB+2fa9SqrEE3DvQ5TME2b5TMHAzSBP2pw=; b=HAeGJ99i5xFhmj3CijzGTxYLYsS22+UCkxr4poXrv7YrVuJ+ys1PsTwIPg8xpWVSxn9zir H57AkKYqiD1vOZNVzVNI7GcU+WBHpxaXuuBnNpw5g5o1ZYYgFiQKUmRNmm30EbXVxytcjf W5muscH4uShV5wnAUhi90ZLbjVnLzlo= MIME-Version: 1.0 Subject: Re: [PATCH v2 02/47] mm: shrinker: remove redundant shrinker_rwsem in debugfs operations X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Muchun Song In-Reply-To: <20230724094354.90817-3-zhengqi.arch@bytedance.com> Date: Tue, 25 Jul 2023 11:17:24 +0800 Content-Transfer-Encoding: 7bit Message-Id: <210C013C-AB14-45BC-AB2E-199FF7F5E523@linux.dev> References: <20230724094354.90817-1-zhengqi.arch@bytedance.com> <20230724094354.90817-3-zhengqi.arch@bytedance.com> To: Qi Zheng X-Migadu-Flow: FLOW_OUT X-Mailman-Approved-At: Tue, 25 Jul 2023 07:19:08 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, djwong@kernel.org, Roman Gushchin , david@fromorbit.com, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, Linux Memory Management List , dm-devel@redhat.com, linux-mtd@lists.infradead.org, cel@kernel.org, x86@kernel.org, steven.price@arm.com, cluster-devel@redhat.com, xen-devel@lists.xenproject.org, linux-ext4@vger.kernel.org, "Paul E. McKenney" , linux-arm-msm@vger.kernel.org, linux-nfs@vger.kernel.org, rcu@vger.kernel.org, linux-bcache@vger.kernel.org, yujie.liu@intel.com, Vlastimil Babka , linux-raid@vger.kernel.org, Christian Brauner , tytso@mit.edu, Greg KH , LKML , linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, Sergey Senozhatsky , netdev , linux-fsdevel@vger.kernel.org, Andrew Morton , linux-erofs@lists.ozlabs.org, linux-btrfs@vger.kernel.org, tkhai@ya.ru Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" > On Jul 24, 2023, at 17:43, Qi Zheng wrote: > > The debugfs_remove_recursive() will wait for debugfs_file_put() to return, > so the shrinker will not be freed when doing debugfs operations (such as > shrinker_debugfs_count_show() and shrinker_debugfs_scan_write()), so there > is no need to hold shrinker_rwsem during debugfs operations. > > Signed-off-by: Qi Zheng Reviewed-by: Muchun Song Thanks.