Hi, Abhishek, Abhishek Goel <huntbag@xxxxxxxxxxxxxxxxxx> writes: > On 24/02/22 05:35, Dave Hansen wrote: >> On 2/23/22 15:02, Abhishek Goel wrote: >>> If needed, I will provide experiment results and traces that were used >>> to conclude this. >> It would be great if you can provide some more info. Even just a CPU >> time profile would be helpful. > > Average total time taken for SMT=8 to SMT=1 in v5.14 : 20s > > Average total time taken for SMT=8 to SMT=1 in v5.15 : 36s > > (Observed in system with 150+ CPUs ) We have run into a memory hotplug regression before. Let's check whether the problem is similar. Can you try the below debug patch? Best Regards, Huang, Ying ----------------------------8<------------------------------------------
