2016-11-03 5:10 GMT+08:00 Borislav Petkov <bp@xxxxxxxxx>: > On Mon, Oct 31, 2016 at 09:37:02AM +0800, Wanpeng Li wrote: >> From: Wanpeng Li <wanpeng.li@xxxxxxxxxxx> >> >> | RCU used illegally from idle CPU! >> | rcu_scheduler_active = 1, debug_locks = 0 >> | RCU used illegally from extended quiescent state! >> | no locks held by swapper/1/0. >> | >> | [<ffffffff9d492b95>] do_trace_write_msr+0x135/0x140 >> | [<ffffffff9d06f860>] native_write_msr+0x20/0x30 >> | [<ffffffff9d065fad>] native_apic_msr_eoi_write+0x1d/0x30 >> | [<ffffffff9d05bd1d>] smp_reschedule_interrupt+0x1d/0x30 >> | [<ffffffff9d8daec6>] reschedule_interrupt+0x96/0xa0 > > Please remove the text between [] and the offsets after "+..." - those > are useless in a commit message. > >> Reschedule interrupt may be called in cpu idle state. This causes lockdep > > s/cpu/CPU/ > >> check warning above. >> >> As Peterz pointed out: >> >> | So now we're making a very frequent interrupt slower because of debug >> | code. >> | >> | The thing is, many many smp_reschedule_interrupt() invocations don't >> | actually execute anything much at all and are only send to tickle the > > s/send/sent/ I will send a new version to clean it up. Regards, Wanpeng Li -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
