Hi Tejun, On Tue, Jun 18, 2024 at 11:17:24AM -1000 Tejun Heo wrote: > Implement a new scheduler class sched_ext (SCX), which allows scheduling > policies to be implemented as BPF programs to achieve the following: > I looks like this is slated for v6.12 now? That would be good. My initial experimentation with scx has been positive. I just picked one email, not completely randomly. > - Both enable and disable paths are a bit complicated. The enable path > switches all tasks without blocking to avoid issues which can arise from > partially switched states (e.g. the switching task itself being starved). > The disable path can't trust the BPF scheduler at all, so it also has to > guarantee forward progress without blocking. See scx_ops_enable() and > scx_ops_disable_workfn(). I think, from a supportability point of view, there needs to be a pr_info, at least, in each of these places, enable and disable, with the name of the scx scheduler. It looks like there is at least a pr_error for when one gets ejected due to misbehavior. But there needs to be a record of when such is loaded and unloaded. Thoughts? Cheers, Phil
