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Wed, 13 Sep 2023 17:03:05 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id ITUhJUnrAWXbLgAAMHmgww (envelope-from ); Wed, 13 Sep 2023 17:03:05 +0000 Date: Wed, 13 Sep 2023 19:03:03 +0200 From: David Sterba To: Qi Zheng Cc: 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, muchun.song@linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Muchun Song , Chris Mason , Josef Bacik , David Sterba , Alexander Viro , linux-btrfs@vger.kernel.org Subject: Re: [PATCH v6 38/45] fs: super: dynamically allocate the s_shrink Message-ID: <20230913170303.GT20408@twin.jikos.cz> Reply-To: dsterba@suse.cz References: <20230911094444.68966-1-zhengqi.arch@bytedance.com> <20230911094444.68966-39-zhengqi.arch@bytedance.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230911094444.68966-39-zhengqi.arch@bytedance.com> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) X-Rspam-User: X-Stat-Signature: 4yzuhptzexowktwwkn69jad5hdwo9hcp X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 30CBD4002B X-HE-Tag: 1694624587-1051 X-HE-Meta: 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 E9d1Y/h5 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 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 Mon, Sep 11, 2023 at 05:44:37PM +0800, 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 > via 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 > CC: Chris Mason > CC: Josef Bacik > CC: David Sterba Acked-by: David Sterba