Re: [PATCH 1/2] sched_ext: Prevent SCX_KICK_WAIT deadlock by serialization

From: Tejun Heo

Date: Sat Mar 28 2026 - 20:21:25 EST


Hello,

I posted an alternative fix here:

https://lore.kernel.org/r/20260329001856.835643-1-tj@xxxxxxxxxx

Instead of serializing the kicks, it defers the wait to a balance callback
which can drop the rq lock and enable IRQs, avoiding the deadlock while
preserving the concurrent kick_wait semantics.

Thanks.

--
tejun