On Wed, Apr 23, 2008 at 11:57 PM, jasjit singh <singh.jasjit@xxxxxxxxxxx> wrote:
>
> Hi
>
> I am using following functions in my driver for a PCI device.
>
> wait_event_interruptible and wake_up_interruptible.
>
> my algorithm goes like this
>
> fun1()
> {
> waits for an event whose source is an interrupt from the PCI device; /*i.e
> calls wait_event_interruptible*/
> }
>
> fun2()
> {
> Check if there is an interrupt from the PCI device;
> if so, give wake up call to queue that is waited upon in fun1;/*i.e calls
> wake_up_interruptible*/
> }
>
> These functions are called infinitely as the PCI device is continuously
> generating interrupts. so waiting and waking happens a number of times. But
> after some iterations kernel gets panicked with following messages. (fun2 is
> named as ccp_read_irq and ccp_intr_handler is a routine that is invoked when
> there is an interrupt). What could be the reason for kernel getting
> panicked. Is it the huge number of interrupts that it is unable to handle ?
> Kindly have a look at following messages and help me to get a clue of what
> the problem is.
Better to change code so that in event handling code just ack the
interrupt ( by clearing reg) and do all processing (read / write)
later on , you can use either workqueue or tasklet.
>
> Another thing i have tried with my code having no spinlocks at all but the
> problem persists.
>
> kernel messages start here
>
> Kernel BUG at spinlock:75
> invalid operand: 0000 [1] SMP
> CPU 2
> Modules linked in: ccp(U) parport_pc lp parport autofs4 i2c_dev i2c_core nfs
> lod
> Pid: 7099, comm: dat_data_lat_se Tainted: P 26.9-42.ELsmp
> RIP: 0010:[<ffffffff8030b0b7>]
> <ffffffff8030b0b7>{_spin_unlock_irqrestore+27}
> RSP: 0018:0000010005d83eb0 EFLAGS: 00010002
> RAX: 0000000000000001 RBX: 0000010139914880 RCX: 0000000000000000
> RDX: 0000000000000001 RSI: 0000000000000046 RDI: 0000010139914898
> RBP: 0000000000000097 R08: 00000101399148a0 R09: 0000000000000020
> R10: 0000000100000000 R11: 0000000000000202 R12: 00000100b5af5188
> R13: 00000100b5ae0000 R14: 0000000000000000 R15: 0000000000000000
> FS: 0000002a956853e0(0000) GS:ffffffff804e5180(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00000000009c8058 CR3: 0000000005d6e000 CR4: 00000000000006e0
> Process dat_data_lat_se (pid: 7099, threadinfo 000001010da3e000, task
> 000001013)
> Stack: ffffffffa02fd0da 0000000080110833 0000010127c3b780 0000000100000000
> 00003b780000001 0000000000000002 ffffffff80467640 00000000804e5f00
> 00000100b5ae0000 0000000000000002
> Call Trace:<IRQ> <ffffffffa02fd0da>{:ccp:ccp_read_irq+453}
> <ffffffffa02fd295>{:
> <ffffffff80112f4a>{handle_IRQ_event+41}
> <ffffffff801131c4>{do_IRQ+197}
> <ffffffff80110833>{ret_from_intr+0} <EOI>
> <ffffffff8030b3a9>{.text.lock
> <ffffffff8018ab18>{sys_ioctl+104} <ffffffff8011026a>{system_call+126}
>
>
> Code: 0f 0b 6f 4d 32 80 ff ff ff ff 4b 00 c7 07 01 00 00 00 56 9d
> RIP <ffffffff8030b0b7>{_spin_unlock_irqrestore+27} RSP <0000010005d83eb0>
> <0>Kernel panic - not sing: Oops
> Badness in panic at kernel/panic.c:118
>
> Call Trace:<IRQ> <ffffffff80137a86>{panic+527}
> <ffffffff80110833>{ret_from_intr
> <ffffffff80111aec>{oops_end+38} <ffffffff80111b07>{oops_end+65}
> <ffffffff80111c05>{die+54} <ffffffff80111fc8>{do_invalid_op+145}
> <ffffffff8030b0b7>{_spin_unlock_irqrestore+27}
> <ffffffff801321e3>{activa
> <ffffffff8013271e>{try_to_wake_up+876}
> <ffffffff80110d91>{error_exit+0}
> <ffffffff8030b0b7>{_spin_unlock_irqrestore+27}
> <ffffffffa02fd0da>{:ccp:c
> <ffffffffa02fd295>{:ccp:ccp_intr_handler+217}
> <ffffffff80112f4a>{handle_
> <ffffffff801131c4>{do_IRQ+197} <ffffffff80110833>{ret_from_intr+0}
> <EOI> <ffffffff8030b3a9>{.text.lock.spinlock+5}
> <ffffffff8018ab18>{sys_
> <ffffffff8011026a>{system_call+126}
> Badness in i8042_panic_blink at drivers/input/serio/i8042.c:987
>
> Call Trace:<IRQ> <ffffffff80241feb>{i8042_panic_blink+238}
> <ffffffff80137a34>{p
> <ffffffff80110833>{ret_from_intr+0} <ffffffff80111aec>{oops_end+38}
> <ffffffff80111b07>{oops_end+65} <ffffffff80111c05>{die+54}
> <ffffffff80111fc8>{do_invalid_op+145}
> <ffffffff8030b0b7>{_spin_unlock_ir
> <ffffffff801321e3>{activate_task+124}
> <ffffffff8013271e>{try_to_wake_up+
> <ffffffff80110d91>{error_exit+0}
> <ffffffff8030b0b7>{_spin_unlock_irqrest
> <ffffffffa02fd0da>{:ccp:ccp_read_irq+453}
> <ffffffffa02fd295>{:ccp:ccp_in
> <ffffffff80112f4a>{handle_IRQ_event+41}
> <ffffffff801131c4>{do_IRQ+197}
> <ffffffff80110833>{ret_from_intr+0} <EOI>
> <ffffffff8030b3a9>{.text.lock
> <ffffffff8018ab18>{sys_ioctl+104} <ffffffff8011026a>{system_call+126}
>
> Badness in i8042_panic_blink at drivers/input/serio/i8042.c:990
>
> Call Trace:<IRQ> <ffffffff8024207d>{i8042_panic_blink+384}
> <ffffffff80137a34>{p
> <ffffffff80110833>{ret_from_intr+0} <ffffffff80111aec>{oops_end+38}
> <ffffffff80111b07>{oops_end+65} <ffffffff80111c05>{die+54}
> <ffffffff80111fc8>{do_invalid_op+145}
> <ffffffff8030b0b7>{_spin_unlock_ir
> <ffffffff801321e3>{activate_task+124}
> <ffffffff8013271e>{try_to_wake_up+
> <ffffffff80110d91>{error_exit+0}
> <ffffffff8030b0b7>{_spin_unlock_irqrest
> <ffffffffa02fd0da>{:ccp:ccp_read_irq+453}
> <ffffffffa02fd295>{:ccp:ccp_in
> <ffffffff80112f4a>{handle_IRQ_event+41}
> <ffffffff801131c4>{do_IRQ+197}
> <ffffffff80110833>{ret_from_intr+0} <EOI>
> <ffffffff8030b3a9>{.text.lock
> <ffffffff8018ab18>{sys_ioctl+104} <ffffffff8011026a>{system_call+126}
>
> Badness in i8042_panic_blink at drivers/input/serio/i8042.c:992
>
> Call Trace:<IRQ> <ffffffff802420e2>{i8042_panic_blink+485}
> <ffffffff80137a34>{p
> <ffffffff80110833>{ret_from_intr+0} <ffffffff80111aec>{oops_end+38}
> <ffffffff80111b0oops_end+65} <ffffffff80111c05>{die+54}
> <ffffffff80111fc8>{do_invalid_op+145}
> <ffffffff8030b0b7>{_spin_unlock_ir
> <ffffffff801321e3>{activate_task+124}
> <ffffffff8013271e>{try_to_wake_up+
> <ffffffff80110d91>{error_exit+0}
> <ffffffff8030b0b7>{_spin_unlock_irqrest
> <ffffffffa02fd0da>{:ccp:ccp_read_irq+453}
> <ffffffffa02fd295>{:ccp:ccp_in
> <ffffffff80112f4a>{handle_IRQ_event+41}
> <ffffffff801131c4>{do_IRQ+197}
> <ffffffff80110833>{ret_from_intr+0} <EOI>
> <ffffffff8030b3a9>{.text.lock
> <ffffffff8018ab18>{sys_ioctl+104} <ffffffff8011026a>{system_call+126}
>
> Thanks and Regards,
> Jasjit Singh
>
> ________________________________
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--
Thanks
M Rizavan Sipai
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