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From: Muchun Song In-Reply-To: <20230724094354.90817-28-zhengqi.arch@bytedance.com> Date: Wed, 26 Jul 2023 15:27:13 +0800 Cc: Andrew Morton , david@fromorbit.com, tkhai@ya.ru, Vlastimil Babka , Roman Gushchin , djwong@kernel.org, Christian Brauner , "Paul E. McKenney" , tytso@mit.edu, steven.price@arm.com, cel@kernel.org, Sergey Senozhatsky , yujie.liu@intel.com, gregkh@linuxfoundation.org, 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 Content-Transfer-Encoding: 7bit Message-Id: <8A1603B9-570E-45DE-9597-90C3E2825A7A@linux.dev> References: <20230724094354.90817-1-zhengqi.arch@bytedance.com> <20230724094354.90817-28-zhengqi.arch@bytedance.com> To: Qi Zheng X-Migadu-Flow: FLOW_OUT X-Stat-Signature: et1wmd73e4dm4damuwfq55hgnxdnuau4 X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: C760018000C X-Rspam-User: X-HE-Tag: 1690356476-17941 X-HE-Meta: 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 tOgZRAr7 uPW45ZIJ9y0uctf2PoLxr+nef4fdQyQnVk4cKFevRicA/5HJSli5+d+1VSTvdl5lYrvwnTn8C8+NZy4rl0n+LQArURsoj2rqtvYRWoCvF/6MAw7MPTM6KJY95Bh0XLtW2dsYLKEW+u8xxncrGx00N2qTBd2Y50wQ1JZcrf+Ws/BldzJ0lL4x42I+FKaOTP/HyYL4tyZyOx28s3Ur0cKuM4CklcMwRwX409PdraK9HrdPH4NxQ2sEIMP9o8OS5NiIKzZdGhBRvVbTz/h63UtM83rNfJmv59q2hXhOb5QaqGeAHSLA= 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 Jul 24, 2023, at 17:43, Qi Zheng wrote: > > In preparation for implementing lockless slab shrink, use new APIs to > dynamically allocate the md-raid5 shrinker, 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 r5conf. > > Signed-off-by: Qi Zheng Reviewed-by: Muchun Song