While booting Next 17 on a x86_64 box i get the following warning messages multiple times. ODEBUG: object is on stack, but not annotated ------------[ cut here ]------------ WARNING: at lib/debugobjects.c:253 __debug_object_init+0x2bb/0x34d() Hardware name: BladeCenter LS21 -[79716AA]- Modules linked in: mptsas(+) mptscsih mptbase scsi_transport_sas sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd Pid: 20, comm: work_on_cpu/0 Tainted: G W 2.6.29-rc5-autotest-next-20090217 #1 Call Trace: [] warn_slowpath+0xd3/0xf2 [] ? number+0x115/0x21f [] ? _read_lock_irq+0x35/0x41 [] ? _read_lock_irqsave+0x47/0x4d [] ? zisofs_readpage+0x178/0x92e [] ? printk+0x67/0x69 [] ? __debug_object_init+0xd8/0x34d [] __debug_object_init+0x2bb/0x34d [] debug_object_init+0x14/0x19 [] init_timer_key+0x22/0x38 [] mpt_config+0x160/0x289 [mptbase] [] ? trace_hardirqs_on+0xd/0xf [] mpt_findImVolumes+0x88/0x76a [mptbase] [] ? destroy_timer_on_stack+0x10/0x12 [] ? schedule_timeout+0xb1/0xcd [] ? process_timeout+0x0/0xb [] ? schedule_timeout_uninterruptible+0x19/0x1b [] ? msleep+0x14/0x1e [] ? WaitForDoorbellInt+0x3f/0x91 [mptbase] [] ? _spin_unlock_irqrestore+0x3f/0x47 [] ? trace_hardirqs_on_caller+0x1f/0x15f [] ? debug_mutex_init+0x31/0x3d [] mpt_do_ioc_recovery+0x6f1/0x16ab [mptbase] [] ? flat_send_IPI_mask+0x78/0x8a [] ? _spin_unlock_irq+0x2b/0x31 [] ? trace_hardirqs_on_caller+0x1f/0x15f [] ? trace_hardirqs_on+0xd/0xf [] ? _spin_unlock_irq+0x2b/0x31 [] ? wait_for_common+0xd1/0x11e [] ? wait_for_common+0x10c/0x11e [] ? default_wake_function+0x0/0xf [] ? kthread_create+0x104/0x117 [] ? worker_thread+0x0/0xe8 [] ? trace_hardirqs_off+0xd/0xf [] ? flat_send_IPI_mask+0x78/0x8a [] ? _spin_unlock_irqrestore+0x38/0x47 [] ? _spin_unlock_irqrestore+0x3f/0x47 [] ? trace_hardirqs_on_caller+0x1f/0x15f [] ? trace_hardirqs_on+0xd/0xf [] ? __up_read+0x7a/0x83 [] ? up_read+0x26/0x2b [] ? pci_get_slot+0x4b/0x90 [] mpt_attach+0x994/0xb07 [mptbase] [] ? do_work_for_cpu+0x0/0x1b [] mptsas_probe+0x1a/0x439 [mptsas] [] ? do_work_for_cpu+0x0/0x1b [] local_pci_probe+0x12/0x16 [] do_work_for_cpu+0x13/0x1b [] run_workqueue+0x12c/0x236 [] ? run_workqueue+0xd5/0x236 [] ? trace_hardirqs_on+0xd/0xf [] ? trace_hardirqs_on+0xd/0xf [] worker_thread+0xdb/0xe8 [] ? autoremove_wake_function+0x0/0x38 [] ? worker_thread+0x0/0xe8 [] kthread+0x49/0x78 [] child_rip+0xa/0x20 [] ? restore_args+0x0/0x30 [] ? finish_task_switch+0x3b/0xe0 [] ? kthread+0x0/0x78 [] ? child_rip+0x0/0x20 ---[ end trace dd3dd2a755e71b34 ]--- Should i be worried about these ? Complete dmesg log attached. Can provide .config if required. thanks -Sachin -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India ---------------------------------