Hi, Running 5.10.70 on a dom0 shows 100% load on one core for the xen-balloon kernel thread (was a workqueue before 5.10.70).
I have upgraded two dom0's to 5.10.70 and both of them shows this issue. Xen version is 4.15.1. To trigger the problem: dom_mem=3000M,max:3000M Does not trigger the problem: dom_mem=3000M (the other system with the issue has "dom0_mem=4096M,max:4096M") /etc/xl/xl.conf: #autoballon="auto" or autoballon="off" or autoballon="on" does not matter, in trigging the problem (i.e. autoballon="off", still gets [xen-ballon] to hog down one core). Can not see the problem before starting the first domU, and shutting down all domUs stops xen-balloon to hog the core. Workaround in a running system is to lower /sys/devices/system/xen_memory/xen_memory0/target_kb. With max:3000M this was 3072000 (kb), and just lowering it to 3069952 (i.e. by 2 meg) "solved" the issue, and stopped the fan in my laptop :-) / Henrik
