Hi Jon, On 07/03/25 11:40, Jon Hunter wrote: > Hi Juri, > > On 06/03/2025 14:10, Juri Lelli wrote: > > Hello! > > > > Jon reported [1] a suspend regression on a Tegra board configured to > > boot with isolcpus and bisected it to commit 53916d5fd3c0 > > ("sched/deadline: Check bandwidth overflow earlier for hotplug"). > > > > Root cause analysis pointed out that we are currently failing to > > correctly clear and restore bandwidth accounting on root domains after > > changes that initiate from partition_sched_domains(), as it is the case > > for suspend operations on that board. > > > > This is v2 [2] of the proposed approach to fix the issue. With respect > > to v1, the following implements the approach by: > > > > - 01: filter out DEADLINE special tasks > > - 02: preparatory wrappers to be able to grab sched_domains_mutex on > > UP (remove !SMP wrappers - Waiman) > > - 03: generalize unique visiting of root domains so that we can > > re-use the mechanism elsewhere > > - 04: the bulk of the approach, clean and rebuild after changes > > - 05: clean up a now redundant call > > - 06: remove partition_and_rebuild_sched_domains() (Waiman) > > - 07: stop exposing partition_sched_domains_locked (Waiman) > > > > Please test and review. The set is also available at > > > Tested-by: Jon Hunter <jonathanh@xxxxxxxxxx> Thanks! Best, Juri