On Tue, Jan 10, 2023 at 10:43:56AM +0800, Hillf Danton wrote: > On 9 Jan 2023 11:12:49 -0300 Marcelo Tosatti <mtosatti@xxxxxxxxxx> > > > > Yes, but if you do not return to userspace, then the per-CPU vm > > statistics can be dirty indefinitely. > > Could you specify the reasons for failing to return to userspace, > given it is undesired intereference for the shepherd to queue work > on the isolated CPUs. Any system call that takes longer than the threshold to sync vmstats. Or a long running kernel thread, for example: https://stackoverflow.com/questions/65111483/long-running-kthread-and-synchronize-net
