Re: [PATCH] sched_ext: Provide a per-scheduler unique sequence counter
From: Tejun Heo
Date: Mon Sep 30 2024 - 14:33:25 EST
Hello, Andrea.
On Fri, Sep 27, 2024 at 06:59:01PM +0200, Andrea Righi wrote:
...
> @@ -662,6 +662,13 @@ struct sched_ext_ops {
> */
> u64 hotplug_seq;
>
> + /*
> + * enable_seq - unique per-scheduler counter that can be accessed from
> + * user-space to determine if a scheduler (within a specific hierarchy)
> + * has been restarted.
> + */
> + s64 enable_seq;
Let's just make it a global variable for now. When we package up context for
each scheduler instance into a struct, it will get packaged up together.
It's a bit odd to add enable_seq to ops as userspace can't do anything with
it (note that hotplug_seq is different in that it's provided by the
userspace on load).
Thanks.
--
tejun