> On 26-Aug-2019, at 3:42 PM, Sachin Sant <sachinp@xxxxxxxxxxxxxxxxxx> wrote: > >> On 26-Aug-2019, at 8:59 AM, Michael Ellerman <mpe@xxxxxxxxxxxxxx> wrote: >> >> Sachin Sant <sachinp@xxxxxxxxxxxxxxxxxx> writes: >>> linux-next is currently broken on POWER8 non virtualized. Kernel >>> fails to reach login prompt with following kernel warning >>> repeatedly shown during boot. >> >> I don't see it on my test systems. >> >> The backtrace makes it look like you're doing CPU hot_un_plug during >> boot, which seems a bit odd. >> > There is no explicit hot un plug operation being done. This happens > during boot. > > For some reason cpu’s are being off lined. So this machine was configured as a KVM host. Hence the SMT=1 configuration at boot. Removing QEMU/libvirt packages and unloading kvm module gets me to SMT 8 config. Disabling kvm also allows me to boot next kernels without the warning. The warning is only seen with kvm configured. Thanks -Sachin
