Hello. I've written a driver for a PCIe device running on a machine with rt patches. (3.0.17-1.rt33.1.fc16.ccrma.x86_64.rt SMP RT to be precise) All seems to work smoothly, except I'm getting a BUG "sleeping function called from invalid context" print for calling "pci_unregister_driver()" from my module exit function. >From what I understand, the exit function is called from the rmmod process, using a regular thread and should not be in atomic mode. Therefore it should be able to acquire spinlocks without problem, since it could sleep. So why is this happening? Entire printout : [ 3110.771019] BUG: sleeping function called from invalid context at kernel/rtmutex.c:645 [ 3110.771021] in_atomic(): 0, irqs_disabled(): 1, pid: 759, name: rmmod [ 3110.771022] INFO: lockdep is turned off. [ 3110.771023] irq event stamp: 0 [ 3110.771024] hardirqs last enabled at (0): [< (null)>] (null) [ 3110.771026] hardirqs last disabled at (0): [<ffffffff81059249>] copy_process+0x6d0/0x14af [ 3110.771031] softirqs last enabled at (0): [<ffffffff81059249>] copy_process+0x6d0/0x14af [ 3110.771033] softirqs last disabled at (0): [< (null)>] (null) [ 3110.771036] Pid: 759, comm: rmmod Not tainted 3.0.17-1.rt33.1.fc16.ccrma.x86_64.rt #1 [ 3110.771037] Call Trace: [ 3110.771040] [<ffffffff8108e047>] ? print_irqtrace_events+0x9e/0xa2 [ 3110.771043] [<ffffffff8104c44d>] __might_sleep+0x103/0x108 [ 3110.771047] [<ffffffff814f1a98>] rt_spin_lock+0x24/0x56 [ 3110.771050] [<ffffffff81261442>] dma_debug_device_change+0x71/0x1d9 [ 3110.771054] [<ffffffff814f553e>] notifier_call_chain+0x84/0xbb [ 3110.771057] [<ffffffff810954e4>] ? rt_down_read+0x10/0x12 [ 3110.771060] [<ffffffff8107fa8a>] __blocking_notifier_call_chain+0x67/0x84 [ 3110.771063] [<ffffffff8107fabb>] blocking_notifier_call_chain+0x14/0x16 [ 3110.771067] [<ffffffff813194de>] __device_release_driver+0xcd/0xd2 [ 3110.771069] [<ffffffff81319b9e>] driver_detach+0xa4/0xca [ 3110.771071] [<ffffffff8131935c>] bus_remove_driver+0xba/0xde [ 3110.771074] [<ffffffff8131a23d>] driver_unregister+0x6a/0x75 [ 3110.771077] [<ffffffff8126ae24>] pci_unregister_driver+0x44/0x97 [ 3110.771081] [<ffffffffa02c01a7>] MPUExit+0x3f/0x6f [mpu] [ 3110.771084] [<ffffffff81099448>] sys_delete_module+0x1d9/0x24d [ 3110.771087] [<ffffffff810b5e67>] ? audit_syscall_entry+0x11c/0x148 [ 3110.771090] [<ffffffff81251f36>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 3110.771093] [<ffffffff814f8482>] system_call_fastpath+0x16/0x1b Thank you. EyalC -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
