kvm: pic: non byte write
INFO: rcu_sched detected stalls on CPUs/tasks:
	1-...: (0 ticks this GP) idle=7d4/0/0 softirq=37653/37653 fqs=0 
	(detected by 0, t=125002 jiffies, g=20793, c=20792, q=93)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff84d1be76
rcu_sched kthread starved for 125002 jiffies! g20793 c20792 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=1
rcu_sched       I22064     8      2 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2790 [inline]
 __schedule+0x8eb/0x2060 kernel/sched/core.c:3366
 schedule+0xf5/0x430 kernel/sched/core.c:3425
 schedule_timeout+0x150/0x250 kernel/time/timer.c:1743
 rcu_gp_kthread+0x9e5/0x1930 kernel/rcu/tree.c:2247
 kthread+0x35e/0x430 kernel/kthread.c:231
 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431