Hi Tejun, On Wed, Aug 07, 2024 at 09:26:28AM -1000 Tejun Heo wrote: > Hello, Phil. > > On Wed, Aug 07, 2024 at 03:11:08PM -0400, Phil Auld wrote: > > 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. > > Yeap and great to hear. > > > 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. > > Sure, that's not difficult. Will do so soon. Thanks! That would be helpful. I was going to offer a patch but wanted to ask first in case there was history. But if you are willing to do it that's even better :) Cheers, Phil > > Thanks. > > -- > tejun > --
