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Re: [PATCH v2 40/47] fs: super: dynamically allocate the s_shrink
- To: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
- From: Muchun Song <muchun.song@xxxxxxxxx>
- Date: Wed, 26 Jul 2023 15:45:56 +0800
- Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, x86@xxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-erofs@xxxxxxxxxxxxxxxx, linux-f2fs-devel@xxxxxxxxxxxxxxxxxxxxx, cluster-devel@xxxxxxxxxx, linux-nfs@xxxxxxxxxxxxxxx, linux-mtd@xxxxxxxxxxxxxxxxxxx, rcu@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, linux-arm-msm@xxxxxxxxxxxxxxx, dm-devel@xxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, linux-bcache@xxxxxxxxxxxxxxx, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, linux-xfs@xxxxxxxxxxxxxxx, linux-btrfs@xxxxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, david@xxxxxxxxxxxxx, tkhai@xxxxx, vbabka@xxxxxxx, roman.gushchin@xxxxxxxxx, djwong@xxxxxxxxxx, brauner@xxxxxxxxxx, paulmck@xxxxxxxxxx, tytso@xxxxxxx, steven.price@xxxxxxx, cel@xxxxxxxxxx, senozhatsky@xxxxxxxxxxxx, yujie.liu@xxxxxxxxx, gregkh@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 26 Jul 2023 07:46:23 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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 <zhengqi.arch@xxxxxxxxxxxxx>
Reviewed-by: Muchun Song <songmuchun@xxxxxxxxxxxxx>
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