On 12/29/2017 04:48 PM, Alexander Tsoy wrote: > В Пт, 29/12/2017 в 12:14 +0100, Toralf Förster пишет: >> I can confirm now, that that kernel breaks both a desktop (an >> ThinkPad T440s i5) and a headless server (i3930) setup. For the >> server the attached .config works fine but switching from >> CONFIG_GENERIC_CPU to CONFIG_MCORE2 legt them hang at boot w/op any >> messages. Similar picture at the desktop. > > You most likely have the same problem as me: > https://lkml.org/lkml/2017/12/29/279 > Indeed, I got a similar message at my ThinkPad too when I tried to bisect it: >[ 21.776011] INFO: rcu_preempt detected stalls on CPUs/tasks: >[ 21.w77008] 0-...!: (0 ticks this GP) idle=c56/140000000000000/0 >softirq=73/73 fqs=0 >[ 21.777008] (detected by 1, t=21002 jiffies, g=-255, c=-256, q=4) -- Toralf PGP C4EACDDE 0076E94E