Hi Oliver, Thanks again for your help previously with running the tests in [1]. There have been some other clean ups so I've rebased that patch [2] and created a separate branch in percpu#depop-batching [3]. Could you please run aim9.sync_disk_rw.ops_per_sec against percpu#depop-batching? [1] https://lore.kernel.org/lkml/20210427073448.GD32408@xsang-OptiPlex-9020/ [2] https://lore.kernel.org/lkml/20210419225047.3415425-5-dennis@xxxxxxxxxx/ [3] https://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu.git/log/?h=depop-batching Thanks, Dennis