Hi, Kernel warning is seen while booting up 2.6.24.4 kernel on x86_64 box with the CONFIG_DEBUG_LOCKDEP enabled. WARNING: at kernel/lockdep.c:2662 check_flags() Pid: 0, comm: swapper Not tainted 2.6.24.4 #1 Call Trace: [<ffffffff8025b02a>] check_flags+0xc6/0x19e [<ffffffff8025eb82>] lock_acquire+0x53/0xb2 [<ffffffff804b51ac>] __atomic_notifier_call_chain+0x50/0xaf [<ffffffff8020af14>] mwait_idle+0x0/0x50 [<ffffffff804b521a>] atomic_notifier_call_chain+0xf/0x11 [<ffffffff8020ab7e>] __exit_idle+0x27/0x29 [<ffffffff8020ae90>] cpu_idle+0xa8/0xe2 [<ffffffff80220679>] start_secondary+0x3c6/0x3d5 possible reason: unannotated irqs-on. irq event stamp: 720 hardirqs last enabled at (719): [<ffffffff804b1f6a>] trace_hardirqs_on_thunk+0x35/0x3a hardirqs last disabled at (720): [<ffffffff8020ae84>] cpu_idle+0x9c/0xe2 softirqs last enabled at (718): [<ffffffff80241b40>] __do_softirq+0xd9/0xe2 softirqs last disabled at (713): [<ffffffff8020d49c>] call_softirq+0x1c/0x28 -- Thanks & Regards, Kamalesh Babulal, Linux Technology Center, IBM, ISTL. --
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