---- 在 星期五, 2020-11-13 14:55:46 Chengguang Xu <cgxu519@xxxxxxxxxxxx> 撰写 ---- > Current syncfs(2) syscall on overlayfs just calls sync_filesystem() > on upper_sb to synchronize whole dirty inodes in upper filesystem > regardless of the overlay ownership of the inode. In the use case of > container, when multiple containers using the same underlying upper > filesystem, it has some shortcomings as below. > > (1) Performance > Synchronization is probably heavy because it actually syncs unnecessary > inodes for target overlayfs. > > (2) Interference > Unplanned synchronization will probably impact IO performance of > unrelated container processes on the other overlayfs. > > This series try to implement containerized syncfs for overlayfs so that > only sync target dirty upper inodes which are belong to specific overlayfs > instance. By doing this, it is able to reduce cost of synchronization and > will not seriously impact IO performance of unrelated processes. Hi Miklos, I think this version has addressed all previous issues and comments from Jack and Amir. Have you got time to review this patch series? Thanks, Chengguang
