Messages in this thread | | | Date | Tue, 21 Oct 2008 09:02:05 +0200 | From | Thibaut BOYER <> | Subject | rt_down / rt_down_timeout troubles & bug |
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Hi,
I'm using Preempt_rt (2.6.25.2-rt9) and it seems rt_down/rt_down_timeout have a bad behaviour... Each time I'm doing an insmod with my driver I got the same Oops.
For example with this code :
DPRLIBLOGMSG("before rt_down\"); rt_down(&p->sem_config_conf); do { DPRLIBLOGMSG("test ok\n"); } while(1);
The dmesg stops *before rt_down* and nothing more happens.
And with this code :
DPRLIBLOGMSG("before rt_down_timeout\"); rt_down_timeout(&p->sem_config_conf, local msecs_to_jiffies(1000)); do { DPRLIBLOGMSG("test ok\n"); } while(1);
I got the following Oops right after *before **r**t_down_timeout* :
BUG: unable to handle kernel NULL pointer dereference at 00000000 IP: [<00000000>] *pde = 00000000 Oops: 0000 [#1] PREEMPT Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: cp16xx(P) e100 mii
Pid: 5, comm: sirq-timer/0 Tainted: P (2.6.26.5-rt9-ipipe #2) EIP: 0060:[<00000000>] EFLAGS: 00010246 CPU: 0 EIP is at 0x0 EAX: dc11df0c EBX: 00000000 ECX: 00000001 EDX: 00000000 ESI: dc11df0c EDI: c0498e20 EBP: ddc29f58 ESP: ddc29f40 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 preempt:00000001 Process sirq-timer/0 (pid: 5, ti=ddc29000 task=ddc44d80 task.ti=ddc29000) Stack: c0133e3a 00000000 c0498ea4 00000202 c050af80 fffffffd ddc29f6c c0134a38 c050af80 ddc29f6c 00000202 ddc29fa0 c0126452 00000001 00000002 c050aab0 ddc29f88 c013da9b ddc29fa0 00000046 00000002 00000002 c050aab0 fffffffd Call Trace: [<c0133e3a>] ? run_hrtimer_pending+0x5a/0x110 [<c0134a38>] ? hrtimer_run_pending+0x48/0xe0 [<c0126452>] ? run_timer_softirq+0x82/0x2c0 [<c013da9b>] ? trace_hardirqs_on+0xb/0x10 [<c012298d>] ? ksoftirqd+0x10d/0x230 [<c0122880>] ? ksoftirqd+0x0/0x230 [<c0130716>] ? kthread+0x46/0x80 [<c01306d0>] ? kthread+0x0/0x80 [<c0103cf3>] ? kernel_thread_helper+0x7/0x10 ======================= INFO: lockdep is turned off. Code: Bad EIP value. EIP: [<00000000>] 0x0 SS:ESP 0068:ddc29f40 ---[ end trace ce167a848c96a955 ]---
Bellow, follows more lines of the dmesg. Thanks for your help TB
cp16xx_init: calls pci_module_init() cp16xx_pci_probe: begin cp16xx_init_pci: begin cp16xx_init_pci: bar1 start=0xed040000 size=0x10000 cp16xx_init_pci: bar2 start=0xea800000 size=0x10000 cp16xx_init_pci: bar3 start=0xea000000 size=0x800000 cp16xx_init_pci: bar4 start=0xec000000 size=0x1000000 cp16xx_init_pci: bar5 start=0xe8000000 size=0x2000000 cp16xx_init_pci: virtual address register_bar_ptr 0xde980000 cp16xx_init_pci: virtual address dpram_bar_ptr 0xdf200000 cp16xx_init_pci: virtual address dpram_config_area_ptr 0xdf300000 cp16xx_init_pci: swi_version=0x20051600(must be 0x2005xxxx) cp16xx_init_pci: got PNIO phys 13510000, virt d3510000, size 0x10000 cp16xx_init_pci: got TRACE phys 134ec000, virt d34ec000, size 0x408 cp16xx_l2_get_dma_pool: l2eth_dma_page_order=7, pages = log2N =128 cp16xx_l2_get_dma_pool: got L2 phys 00c00000, virt c0c00000, size 0x80000 cp16xx_init_pci: end cp16xx_pci_probe: got major 253 allocated cp16xx_dprlib_setup: begin cp16xx_dprlib_setup: end cp16xx_init_irq: begin cp16xx_init_irq: request irq 18, card 0xde830000 cp16xx_init_irq: request irq 18 -> OK cp16xx_init_irq: end cp16xx_daemon_start: create new kernel thread cp16xx_daemon: begin cp16xx_daemon: start wait for FW to be ready DPRLIB_start: ->DPRLIB_start dprlib_init_dpram: -> init_dpram dprlib_start_threads: -> start_thread dprlib_start_all_tasks_and_semaphores: start dprlib_start_all_tasks_and_semaphores: Semaphores are created, now begin to create threads dprlib_proc: start dprlib_proc: wait cp16xx_pci_probe: end cp16xx_init: end dprlib_start_all_tasks_and_semaphores: exit dprlib_start_threads: start_thread <- dprlib_trigger_intr: IRQ Host->FW, C=0xa5a070a0, M=0xa5a07777, MRC=0xa5a07777 dprlib_init_dpram: wait till config interrupt comes from FW (init_dpram) dprlib_proc: wait END dprlib_config_proc: start dprlib_config_proc: exit dprlib_proc: wait dprlib_init_dpram: interrupt coming from FW (init_dpram) dprlib_init_dpram: Driver version 0x79, FW version 0x71 dprlib_init_channels: -> init_channels dprlib_init_channels: before rt_down_timeout BUG: unable to handle kernel NULL pointer dereference at 00000000 IP: [<00000000>] *pde = 00000000 Oops: 0000 [#1] PREEMPT Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: cp16xx(P) e100 mii
Pid: 5, comm: sirq-timer/0 Tainted: P (2.6.26.5-rt9-ipipe #2) EIP: 0060:[<00000000>] EFLAGS: 00010246 CPU: 0 EIP is at 0x0 EAX: dc11df0c EBX: 00000000 ECX: 00000001 EDX: 00000000 ESI: dc11df0c EDI: c0498e20 EBP: ddc29f58 ESP: ddc29f40 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 preempt:00000001 Process sirq-timer/0 (pid: 5, ti=ddc29000 task=ddc44d80 task.ti=ddc29000) Stack: c0133e3a 00000000 c0498ea4 00000202 c050af80 fffffffd ddc29f6c c0134a38 c050af80 ddc29f6c 00000202 ddc29fa0 c0126452 00000001 00000002 c050aab0 ddc29f88 c013da9b ddc29fa0 00000046 00000002 00000002 c050aab0 fffffffd Call Trace: [<c0133e3a>] ? run_hrtimer_pending+0x5a/0x110 [<c0134a38>] ? hrtimer_run_pending+0x48/0xe0 [<c0126452>] ? run_timer_softirq+0x82/0x2c0 [<c013da9b>] ? trace_hardirqs_on+0xb/0x10 [<c012298d>] ? ksoftirqd+0x10d/0x230 [<c0122880>] ? ksoftirqd+0x0/0x230 [<c0130716>] ? kthread+0x46/0x80 [<c01306d0>] ? kthread+0x0/0x80 [<c0103cf3>] ? kernel_thread_helper+0x7/0x10 ======================= INFO: lockdep is turned off. Code: Bad EIP value. EIP: [<00000000>] 0x0 SS:ESP 0068:ddc29f40 ---[ end trace ce167a848c96a955 ]---
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