A report from the LPC sched_ext microconference

Three main topics dominated the discussions Priority inversion and how to handle it in sched_ext: lock holder and lock waiter preemption, time slice extension, and making proxy execution work together with BPF schedulers.

Paravirtualized scheduling: letting the host and guest schedulers cooperate across the VM boundary, with sched_ext as the policy engine on the host.

Device and topology-aware scheduling: using hardware feedback (Intel HFI), device/accelerator locality and cache topology to drive task placement. Priority inversion and how to handle it in sched_ext: lock holder and lock waiter preemption, time slice extension, and making proxy execution work together with BPF schedulers.

Paravirtualized scheduling: letting the host and guest schedulers cooperate across the VM boundary, with sched_ext as the policy engine on the host. Device and topology-aware scheduling: using hardware feedback (Intel HFI), device/accelerator locality and cache topology to drive task placement.