Re: [PATCH 10/24] sched/uclamg: Handle delayed dequeue

Mike Galbraith
2024-09-13T16:40:21Z

On Thu, 2024-09-12 at 16:00 +0200, Mike Galbraith wrote:
>
> Oho, I just hit a pick_eevdf() returns NULL in pick_next_entity() and
> we deref it bug in tip that I recall having seen someone else mention
> them having hit.  LTP was chugging away doing lord knows what when
> evolution apparently decided to check accounts, which didn't go well.

BTW, what LTP was up to was cfs_bandwidth01. I reproduced the crash
using it on master with the full patch set pretty quickly, but rebased
tip 4c293d0fa315 (sans sched/eevdf: More PELT vs DELAYED_DEQUEUE) seems
to be stable.

-Mike