On Fri, Oct 06, 2023 at 12:31:28PM +0200, Mike Galbraith wrote: > On Fri, 2023-10-06 at 10:35 +0200, Marek Szyprowski wrote: > > > > > > Just to note, I've run into this issue on the QEmu's 'arm64/virt' > > platform, not on the Samsung specific hardware. > > It doesn't appear to be arch specific, all I have to do is enable > autogroup, raspberry or x86_64 desktop box, the occasional failure > tripping over task groups, leaving both best and best_left with > identical but not what we're looking for ->min_deadline. OK, autogroups enabled and booted, /debug/sched/debug shows autogroups are indeed in existence. I've ran hackbench and a kernel build, but no whoopsie yet :-( I suppose I'll kick some benchmarks and go make a cup 'o tea or something.