Re: [PATCHSET v12 sched_ext/for-6.20] Add a deadline server for sched_ext tasks

From: Peter Zijlstra

Date: Mon Feb 02 2026 - 14:58:54 EST


On Mon, Feb 02, 2026 at 06:45:29AM -1000, Tejun Heo wrote:
> Hello,
>
> On Mon, Jan 26, 2026 at 10:58:58AM +0100, Andrea Righi wrote:
> > Changes in v12:
> > - Move dl_server execution state reset on stop fix to a separate patch
> > (https://lore.kernel.org/all/20260123161645.2181752-1-arighi@xxxxxxxxxx/)
> > - Removed per-patch changelog (keeping a global changelog here)
> > - Link to v11: https://lore.kernel.org/all/20260120215808.188032-1-arighi@xxxxxxxxxx/
>
> Peter, Ingo, this patchset has been around the block for a long time and the
> remaining deadline and debug patches are reviewed and seem fairly isolated.

They're in well enough shape to merge I suppose, although I think
there's still a few issues to fix.

Notably I think it would be good to not have the scx_server consume dl
bandwidth if scx isn't enabled. And I wonder about that start condition.

> Given that the patchset addresses an on-going issue, I'd prefer to land the
> series before the merge window. If you want to route 1-3 (or the whole
> series) through sched/core, please let me know. Otherwise, I can them
> through sched_ext tree.

They seem to apply without issue to tip/sched/core, so if that works for
you I suppose I can stick them all in.