On 02/05/2013 08:26 PM, Steven Rostedt wrote:
On Tue, Feb 05, 2013 at 05:10:37PM -0800, Ben Greear wrote:=============================== [ INFO: suspicious RCU usage. ] 3.7.6+ #4 Tainted: G C O ------------------------------- /home/greearb/git/linux-3.7.dev.y/kernel/rcutree.c:360 Illegal idle entry in RCU read-side critical section.! 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! 1 lock held by swapper/1/0: #0: (rcu_read_lock){.+.+..}, at: [<ffffffff81489632>] rcu_read_lock+0x0/0x6f stack backtrace: Pid: 0, comm: swapper/1 Tainted: G C O 3.7.6+ #4 Call Trace: <IRQ> [<ffffffff810cecbd>] lockdep_rcu_suspicious+0xfc/0x105 [<ffffffff810fe146>] rcu_eqs_enter_common+0xef/0x178 [<ffffffff810fe24e>] rcu_irq_exit+0x7f/0xb0 [<ffffffff8108edf5>] irq_exit+0xc0/0xcc [<ffffffff8100b635>] do_IRQ+0x97/0xae [<ffffffff815543b2>] common_interrupt+0x72/0x72 <EOI> [<ffffffff81011082>] ? mwait_idle+0x77/0x9f [<ffffffff81011079>] ? mwait_idle+0x6e/0x9f [<ffffffff81011379>] cpu_idle+0x68/0xbc [<ffffffff8154ce84>] start_secondary+0x1fc/0x203BTW, did the above error only happen when you added the dump of the locks, or was it always there? Is this the bug you were trying to debug?
It's often there, at least..and was from the beginning, and I am interested in debugging it. Thanks, Ben -- Ben Greear <[email protected]> Candela Technologies Inc http://www.candelatech.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
