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From: Muchun Song In-Reply-To: <20230724094354.90817-34-zhengqi.arch@bytedance.com> Date: Wed, 26 Jul 2023 15:41:34 +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, senozhatsky@chromium.org, 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: <042841CB-2C3C-4028-85E5-D3B8BCAAE7F7@linux.dev> References: <20230724094354.90817-1-zhengqi.arch@bytedance.com> <20230724094354.90817-34-zhengqi.arch@bytedance.com> To: Qi Zheng X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: F118C10000A X-Stat-Signature: ioudehkquwg8bsiefca49d5pckzxygxw X-HE-Tag: 1690357336-151004 X-HE-Meta: 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 TjCJ/Mxr VAljUb8YHr+BMBvgV03PYdQs4Rzi7jN+fSj2wN/GyL3rRo10QDv8dUWtgJ0PN2ubqmzn7AHfrNU/My5qnw/uWedZJR/A3qdLzwvwAGPiE2hHffY7JhNQxBNfRHGVDqIiUbM0j9TjXxWczN+JUaegsujTfiQh6vrhai2AMjBe9C44q2qWNoFsLpxYWx5kGXgajDVCfYhFZqickg5jQ1aEBjLsNWaSQFTky6dUX5DNHsfDWnNtDRWdiUt1cTCFBakM/9LrNP5+wfuF7z2vqbjpUgS33n9I6782k/XMaOSF8fZCTzj0= 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 jbd2-journal 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 journal_s. > > Signed-off-by: Qi Zheng Reviewed-by: Muchun Song