Hi, When rebasing my qgroup + balance optimization patches, I found one very obvious performance regression for balance. For normal 4G subvolume, 16 snapshots, balance workload, v4.20 kernel only takes 3s to relocate a metadata block group, while for v5.0-rc1, I don't really know how it will take as it hasn't finished yet. And the most important part is, this happens when quota is *DISABLED*!!! I'm bisecting for this regression, but if there are some users trying latest rc kernel, please be aware of this regression. Thanks, Qu
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