Messages in this thread | | | Date | Wed, 6 Aug 2014 14:18:01 -0400 | From | Dave Jones <> | Subject | suspicious RCU usage. (TLB flush tracepoints) |
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=============================== [ INFO: suspicious RCU usage. ] 3.16.0+ #34 Not tainted ------------------------------- include/trace/events/tlb.h:35 suspicious rcu_dereference_check() usage!
other info that might help us debug this:
RCU used illegally from idle CPU! rcu_scheduler_active = 1, debug_locks = 1 RCU used illegally from extended quiescent state! no locks held by swapper/1/0.
stack backtrace: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 3.16.0+ #34 0000000000000001 e7d0f46a57e60fc7 ffff880243357db0 ffffffff8a7f1e37 ffff880243360000 ffff880243357de0 ffffffff8a0cc6c5 ffff8801753693f8 ffff88023e2e2a40 0000000000000001 ffff88023e2e2a40 ffff880243357e10 Call Trace: [<ffffffff8a7f1e37>] dump_stack+0x4e/0x7a [<ffffffff8a0cc6c5>] lockdep_rcu_suspicious+0xd5/0x110 [<ffffffff8a049f05>] leave_mm+0x1a5/0x200 [<ffffffff8a3ec8df>] intel_idle+0x16f/0x190 [<ffffffff8a6623da>] cpuidle_enter_state+0x3a/0xd0 [<ffffffff8a662557>] cpuidle_enter+0x17/0x20 [<ffffffff8a0c719c>] cpu_startup_entry+0x43c/0x800 [<ffffffff8a03232d>] start_secondary+0x29d/0x3b0
Looks like this came from the addition of trace points in d17d8f9de
Dave
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