Hello, I'm receiving this while booting a vanilla 3.19 kernel on a Power 8 machine:
[ 2.522179] device-mapper: uevent: version 1.0.3 [ 2.522741] device-mapper: ioctl: 4.29.0-ioctl (2014-10-28) initialised: dm-de...@redhat.com [ 2.543590] [ 2.543630] =============================== [ 2.543709] [ INFO: suspicious RCU usage. ] [ 2.543758] 3.19.0samb #2 Not tainted [ 2.543802] ------------------------------- [ 2.543847] include/trace/events/timer.h:186 suspicious rcu_dereference_check() usage! [ 2.543940] [ 2.543940] other info that might help us debug this: [ 2.543940] [ 2.544035] [ 2.544035] RCU used illegally from idle CPU! [ 2.544035] rcu_scheduler_active = 1, debug_locks = 0 [ 2.544154] RCU used illegally from extended quiescent state! [ 2.544234] 3 locks held by swapper/1/0: [ 2.544284] #0: (clockevents_lock){-.....}, at: [<c0000000001a45cc>] .clockevents_notify+0x5c/0x320 [ 2.544464] #1: (tick_broadcast_lock){-.-...}, at: [<c0000000001a7ac4>] .tick_broadcast_oneshot_control+0xe4/0x530 [ 2.544654] #2: (hrtimer_bases.lock#2){-.-...}, at: [<c000000000192694>] .__hrtimer_start_range_ns+0x124/0x6e0 [ 2.544843] [ 2.544843] stack backtrace: [ 2.544904] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.19.0samb #2 [ 2.544986] Call Trace: [ 2.545023] [c000000fdf6f7770] [c000000000faf118] .dump_stack+0x98/0xd4 (unreliable) [ 2.545124] [c000000fdf6f77f0] [c000000000152b78] .lockdep_rcu_suspicious+0x138/0x180 [ 2.545225] [c000000fdf6f7880] [c000000000191374] .enqueue_hrtimer+0x1c4/0x300 [ 2.545325] [c000000fdf6f7910] [c00000000019276c] .__hrtimer_start_range_ns+0x1fc/0x6e0 [ 2.545425] [c000000fdf6f7a10] [c0000000001a8e90] .bc_set_next+0xc0/0xf0 [ 2.545510] [c000000fdf6f7aa0] [c0000000001a51f0] .clockevents_program_event+0x100/0x1f0 [ 2.545607] [c000000fdf6f7b40] [c0000000001a6bac] .tick_broadcast_set_event+0x6c/0x120 [ 2.545705] [c000000fdf6f7bd0] [c0000000001a7c94] .tick_broadcast_oneshot_control+0x2b4/0x530 [ 2.545802] [c000000fdf6f7ca0] [c0000000001a4818] .clockevents_notify+0x2a8/0x320 [ 2.545898] [c000000fdf6f7d70] [c0000000001484f4] .cpu_startup_entry+0x404/0x730 [ 2.545995] [c000000fdf6f7ec0] [c000000000044314] .start_secondary+0x3a4/0x460 [ 2.546092] [c000000fdf6f7f90] [c000000000008bfc] start_secondary_prolog+0x10/0x14 [ 2.546555] Registering IBM Power 842 compression driver Cheers, Sam. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev