[okl4-developer] second wombat
Ashish Bijlani
ashish.bijlani at gmail.com
Thu Oct 9 13:37:22 EST 2008
has anybody tried running two instances of wombats??
-ashish
On Tue, Oct 7, 2008 at 6:55 PM, Ashish Bijlani <ashish.bijlani at gmail.com> wrote:
> upon enabling tracepoints in the kernel i get the following msgs:
>
> DABT @ 3e800bd0 [00800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 10
> PF @ 3e800bd0 [3e800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 0
> user execute pagefault by 0002c001 at 3e800bd0, ip=00800bd0, ksp=f001ff80
> SYS_IPC: current: 0002c001, to_tid: 00024001, from_tid: 00024001, tag:
> 0xffe1c002 (label=0xffe1, SR~, u=2)
>
> DABT @ 3e800bd0 [00800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 10
> PF @ 3e800bd0 [3e800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 0
> user execute pagefault by 0002c001 at 3e800bd0, ip=00800bd0, ksp=f001ff80
> SYS_IPC: current: 0002c001, to_tid: 00024001, from_tid: 00024001, tag:
> 0xffe1c002 (label=0xffe1, SR~, u=2)
>
> DABT @ 3e800bd0 [00800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 10
> PF @ 3e800bd0 [3e800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 0
> user execute pagefault by 0002c001 at 3e800bd0, ip=00800bd0, ksp=f001ff80
> SYS_IPC: current: 0002c001, to_tid: 00024001, from_tid: 00024001, tag:
> 0xffe1c002 (label=0xffe1, SR~, u=2)
>
> DABT @ 3e800bd0 [00800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 10
> PF @ 3e800bd0 [3e800bd0], pc = 00800bd0, tcb = f0030dc0, fs = 0
> user execute pagefault by 0002c001 at 3e800bd0, ip=00800bd0, ksp=f001ff80
> SYS_IPC: current: 0002c001, to_tid: 00024001, from_tid: 00024001, tag:
> 0xffe1c002 (label=0xffe1, SR~, u=2)
>
> Why is 0002c001 page faulting at the init thread PC (0x00800bd0)????
>
> Both LINUX1 and LINUX2 start executing from pc=0x800bd0
>
> LINUX1: start_thread current = 81f2dd60 pc = 800bd0, sp = 1e13f30 name: L_1
> LINUX2: start_thread current = 8272dd60 pc = 800bd0, sp = 1d80f30 name: L2_1
>
> But only LINUX2 page faults at 0x800bd0, I dunno why?
>
>
>> showtcbext
> tcb/tid/name [current]: L2_1
> === L2_1 == TCB: f0030dc0 == ID: 0002c001 = e0801f00/e0801f00 ==
> APRIO/EPRIO: 0x62/0x62 ===
> UIP: 00800bd0 queues: Rb space: f0104740/8 pager: L2_syscall
> USP: 01d80f30 tstate: RUNNING ready: L2_1 :L2_1 pdir : f0105600
> sndhd : NIL_THRD blocked : NIL_THRD:NIL_THRD waiting_for : NIL_THRD
> ts length : 0x2710 us, curr ts: 0x2710 us
> resources: 00000000 [ek], ARM [PID: 31, vspace: 0, domain: 7, dom_mask 4001]
> continuation: ffff0cf4 preemption_cont: 00000000
> scheduler: L2_sysca exception_handler: L2_sysca
> partner: NIL_THRD saved partner: NIL_THRD saved state: ABORTED
> tcb_idx: a
> references: T f0101864
>
> user handle: 00000000 cop flags: 00
> preempt flags: 00 [~]
> incoming notify bits: 00000000 notify mask: 00000000
> last preempted_ip: 00000000 preempt_callback_ip: 00000000
>
> mr( 0): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> mr( 8): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> mr(16): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> mr(24): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
> Message Tag: 0 untyped, label = 0, flags = -
>
> Acceptor: 00000000 (a) Error code: 0
>
> Any ideas on this???
>
> Thanks,
> Ashish
>
> On Tue, Oct 7, 2008 at 6:48 PM, Ashish Bijlani <ashish.bijlani at gmail.com> wrote:
>> I disabled ig_serial in wombat1. however, wombat2 doesn't gives sh shell :
>>
>>
>> VFS: Mounted root (ext2 filesystem) readonly.
>> vserial: init done (handle: 1, owner: 1c001, mask: 2)
>> LINUX1: flush_thread called
>> LINUX1: start_thread current = 81f2dd60 pc = 800bd0, sp = 1e13f30 name: L_1
>> LINUX2 RUNNING INIT
>> LINUX2: execve called
>> LINUX2: flush_thread called
>> LINUX2: start_thread current = 8272dd60 pc = 800bd0, sp = 1d80f30 name: L2_1
>>
>> I can see wombat1 printks through KDB console but wombat1 init process
>> hangs. there is no wombat1 serial involved and vserial in iguana just
>> has 1 client (wombat2). Is there something that i'm missing?
>>
>> Thanks,
>> Ashish
>>
>> On Mon, Oct 6, 2008 at 11:51 PM, Ashish Bijlani
>> <ashish.bijlani at gmail.com> wrote:
>>> Thanks for the help Geoff. However, I tried disabling the serial
>>> console in the first wombat. Even then the serial console stuff
>>> doesn't work. It shows the same behavior - hangs and doesn' gimme
>>> bash/sh shell.
>>>
>>> -ashish
>>>
>>> On Mon, Oct 6, 2008 at 11:37 PM, Geoffrey Lee <glee at ok-labs.com> wrote:
>>>> On Mon, Oct 06, 2008 at 07:15:53PM -0400, Ashish Bijlani wrote:
>>>>> I think there is conflict between the init processes from the two wombats:
>>>>>
>>>>> vserial: init done (handle: 0, owner: 18001, mask: 2
>>>>> vserial: init done (handle: 1, owner: 1c001, mask: 2)
>>>>> start_thread current = 81f2dd60 pc = 800bd0, sp = 1ac5f30 name: L_1
>>>>> start_thread current = 8272dd60 pc = 800bd0, sp = 1e96f30 name: L2_1
>>>>
>>>> Ashish - if you are referring to the /sbin/init processes in
>>>> OK Linux they wouldn't be conflicting directly - each would run
>>>> in its own separate VM. From the symptoms however it seems
>>>> that the serial sharing is getting confused, I would debug
>>>> the vserial <-> OK Linux interactions between the two
>>>> OK Linux VMs.
>>>>
>>>> -gl
>>>>
>>>>>
>>>>> Does anybody have any idea?
>>>>>
>>>>> -Ashish
>>>>>
>>>>> On Mon, Oct 6, 2008 at 2:54 AM, Ashish Bijlani <ashish.bijlani at gmail.com> wrote:
>>>>> > I get Error Code = 2 for L_syscall and L2_syscall
>>>>> >
>>>>> >
>>>>> >
>>>>> >> showtcbext
>>>>> > tcb/tid/name [current]: L1
>>>>> > No thread named: L1
>>>>> >> showtcbext
>>>>> > tcb/tid/name [current]: L_syscall
>>>>> > === L_syscall == TCB: f00309a0 == ID: 00020001 = e0501e00/e0501e00 ==
>>>>> > APRIO/EPRIO: 0x63/0x63 ===
>>>>> > UIP: 810b9a2c queues: rB space: f01049f8/5 pager: roottask
>>>>> > USP: 811cc5cc tstate: WAIT_FOREVER ready: NIL_THRD:NIL_THRD pdir : f0105900
>>>>> > sndhd : NIL_THRD blocked : L_syscal:L_syscal waiting_for : L_timer
>>>>> > ts length : 0x2710 us, curr ts: 0x2710 us
>>>>> > resources: 00000000 [ek], ARM [PID: 0, vspace: 1, domain: 10,
>>>>> > dom_mask 55510001]
>>>>> > continuation: f0002428 preemption_cont: 00000000
>>>>> > scheduler: L_syscal exception_handler: roottask
>>>>> > partner: L_timer saved partner: NIL_THRD saved state: ABORTED
>>>>> > tcb_idx: 7
>>>>> > references: T f010184c->f0031380(I)->f0031420(I)->f0031358(I)->f00310c0(I)->f0031160(I)->f0031098(I)->f0030f60(I)->f0031000(I)->f0030f38(I)->f0030ca0(I)->f0030d40(I)->f0030c78(I)->f010844c(I)->f0030a80(I)
>>>>> >
>>>>> > user handle: 00000000 cop flags: 00
>>>>> > preempt flags: 00 [~]
>>>>> > incoming notify bits: 00000000 notify mask: 00000000
>>>>> > last preempted_ip: 810040c4 preempt_callback_ip: 810041f8
>>>>> >
>>>>> > mr( 0): 00000000 811cc648 811cc604 811cc608 811c4640 811cc648 01e97d44 000000c0
>>>>> > mr( 8): 00002654 00988e78 01e97d44 0002cef4 ef900066 40000010 00000000 00000000
>>>>> > mr(16): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> > mr(24): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> > Message Tag: 0 untyped, label = 0, flags = -
>>>>> >
>>>>> > Acceptor: 00000000 (a) Error code: 2
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> >
>>>>> >> showtcbext
>>>>> > tcb/tid/name [current]: L2_syscall
>>>>> > === L2_syscall == TCB: f0030b00 == ID: 00024001 = e0601e00/e0601e00 ==
>>>>> > APRIO/EPRIO: 0x63/0x63 ===
>>>>> > UIP: 81eb99c8 queues: rb space: f0104910/6 pager: roottask
>>>>> > USP: 8282ff60 tstate: WAIT_FOREVER ready: NIL_THRD:NIL_THRD pdir : f0105800
>>>>> > sndhd : NIL_THRD blocked : NIL_THRD:NIL_THRD waiting_for : NIL_THRD
>>>>> > ts length : 0x2710 us, curr ts: 0x2710 us
>>>>> > resources: 00000000 [ek], ARM [PID: 0, vspace: 1, domain: 5, dom_mask 401]
>>>>> > continuation: f0002428 preemption_cont: 00000000
>>>>> > scheduler: L2_sysca exception_handler: roottask
>>>>> > partner: ANY_THRD saved partner: NIL_THRD saved state: ABORTED
>>>>> > tcb_idx: 8
>>>>> > references: T f0101854->f0030e00(I)->f0030ea0(I)->f0030dd8(I)->f0030be0(I)
>>>>> >
>>>>> > user handle: 00000000 cop flags: 00
>>>>> > preempt flags: 00 [~]
>>>>> > incoming notify bits: 00000000 notify mask: 00000000
>>>>> > last preempted_ip: 81e07844 preempt_callback_ip: 81e042ec
>>>>> >
>>>>> > mr( 0): 00000000 00000001 8282c000 00000000 8282c05c 81fbb4ec 8002c380 00000000
>>>>> > mr( 8): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> > mr(16): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> > mr(24): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> > Message Tag: 0 untyped, label = 0, flags = -
>>>>> >
>>>>> > Acceptor: 00000000 (a) Error code: 2
>>>>> >
>>>>> >
>>>>> > Upon debugging more I found out the Error Code 2 comes because of this :
>>>>> >
>>>>> > "
>>>>> > Mount-cache hash table entries: 512
>>>>> > current = L2_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> >
>>>>> > current = L2_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> >
>>>>> > current = L2_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> >
>>>>> > Mount-cache hash table entries: 512
>>>>> > current = L_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> >
>>>>> > current = L_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> >
>>>>> > current = L_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> >
>>>>> > current = L_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> >
>>>>> > current = L_syscall
>>>>> > SYS_EXCHANGE_REGISTERS: dest=NIL_THRD, control=0x80 [~~~~~~~~~~],
>>>>> > usp=00000000, uip=00000000, uflags=00000000, uhandle=0
>>>>> > "
>>>>> >
>>>>> > Is this normal? How do I fix this?
>>>>> >
>>>>> > Thanks,
>>>>> > Ashish
>>>>> >
>>>>> >
>>>>> > On Sun, Oct 5, 2008 at 8:54 PM, Ashish Bijlani <ashish.bijlani at gmail.com> wrote:
>>>>> >>> showtcbext
>>>>> >> tcb/tid/name [current]: L2_1
>>>>> >> === L2_1 == TCB: f0030dc0 == ID: 0002c001 = e0801f00/e0801f00 ==
>>>>> >> APRIO/EPRIO: 0x62/0x62 ===
>>>>> >> UIP: 00800bd0 queues: Rb space: f0104740/8 pager: L2_syscall
>>>>> >> USP: 01c26f30 tstate: RUNNING ready: L2_1 :L2_1 pdir : f0105600
>>>>> >> sndhd : NIL_THRD blocked : NIL_THRD:NIL_THRD waiting_for : NIL_THRD
>>>>> >> ts length : 0x2710 us, curr ts: 0x2710 us
>>>>> >> resources: 00000000 [ek], ARM [PID: 31, vspace: 0, domain: 7, dom_mask 4001]
>>>>> >> continuation: ffff0cf4 preemption_cont: 00000000
>>>>> >> scheduler: L2_sysca exception_handler: L2_sysca
>>>>> >> partner: NIL_THRD saved partner: NIL_THRD saved state: ABORTED
>>>>> >> tcb_idx: a
>>>>> >> references: T f0101864
>>>>> >>
>>>>> >> user handle: 00000000 cop flags: 00
>>>>> >> preempt flags: 00 [~]
>>>>> >> incoming notify bits: 00000000 notify mask: 00000000
>>>>> >> last preempted_ip: 00000000 preempt_callback_ip: 00000000
>>>>> >>
>>>>> >> mr( 0): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> >> mr( 8): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> >> mr(16): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> >> mr(24): 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>>>> >> Message Tag: 0 untyped, label = 0, flags = -
>>>>> >>
>>>>> >> Acceptor: 00000000 (a) Error code: 0
>>>>> >>
>>>>> >>
>>>>> >> On Sun, Oct 5, 2008 at 8:51 PM, Ashish Bijlani <ashish.bijlani at gmail.com> wrote:
>>>>> >>> Hi,
>>>>> >>>
>>>>> >>> I'm running two wombats on emulated (skyeye) gumstix platform.
>>>>> >>> However, the wombat that boots up last doesn't prints any msgs on the
>>>>> >>> serial console. AFAIK, once linux starts "init" process msgs over
>>>>> >>> serial console appear through vserial server/client model and not
>>>>> >>> through L4KDB. However, the latter wombat either doesn't get serial
>>>>> >>> console to dump msgs or it is blocked on some event; I'm not sure
>>>>> >>> though. I've modified vserial server in iguana to make the latter
>>>>> >>> wombat's vserial client as the active_virtual client, but I don't see
>>>>> >>> any output. What could be the reason?
>>>>> >>>
>>>>> >>> snippet from vserial to make the last wombat as active_virtual
>>>>> >>>
>>>>> >>> "
>>>>> >>> for (i = 0; i < 4; i++)
>>>>> >>> {
>>>>> >>> if (virtual_device_instance[i].valid_instance)
>>>>> >>> {
>>>>> >>> virtual_device_instance[i].serial_device = (void *)(serial_device);
>>>>> >>> // XXX virtual_device_instance[i].thread = *thread;
>>>>> >>> // XXX virtual_device_instance[i].mask = mask;
>>>>> >>>
>>>>> >>> virtual_device_instance[i].si_start =
>>>>> >>> virtual_device_instance[i].si_end = NULL;
>>>>> >>> virtual_device_instance[i].si_comp_end =
>>>>> >>> virtual_device_instance[i].si_comp_start = NULL;
>>>>> >>>
>>>>> >>> if (serial_device->active_virtual == NULL)
>>>>> >>> {
>>>>> >>> serial_device->active_virtual = &virtual_device_instance[i];
>>>>> >>> serial_device->last_virtual = &virtual_device_instance[i];
>>>>> >>> }
>>>>> >>> else
>>>>> >>> {
>>>>> >>> serial_device->active_virtual = &virtual_device_instance[i];
>>>>> >>> serial_device->last_virtual->next = &virtual_device_instance[i];
>>>>> >>> serial_device->last_virtual = &virtual_device_instance[i];
>>>>> >>> }
>>>>> >>> }
>>>>> >>> }
>>>>> >>> "
>>>>> >>>
>>>>> >>> Output snippet
>>>>> >>>
>>>>> >>> "
>>>>> >>> NET: Registered protocol family 15
>>>>> >>> VFS: Mounted root (ext2 filesystem) readonly.
>>>>> >>> PXA FFUART IRQ: 33
>>>>> >>> vserial: init done (handle: 0, owner: 18001, mask: 2)
>>>>> >>>
>>>>> >>> Client: 0x0
>>>>> >>> io scheduler noop registered
>>>>> >>> io scheduler anticipatory registered
>>>>> >>> io scheduler deadline registered
>>>>> >>> io scheduler cfq registered (default)
>>>>> >>> RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
>>>>> >>> loop: module loaded
>>>>> >>> tun: Universal TUN/TAP device driver, 1.6
>>>>> >>> tun: (C) 1999-2004 Max Krasnyansky <maxk at qualcomm.com>
>>>>> >>> igms0: unknown partition table
>>>>> >>> Iguana ramdisk driver initialized
>>>>> >>> kobject_add failed for ttyS0 with -EEXIST, don't try to register
>>>>> >>> things with the same name in the same directory.
>>>>> >>> This architecture does not implement dump_stack()
>>>>> >>> Iguana virtual serial driver v1.0
>>>>> >>> TCP cubic registered
>>>>> >>> NET: Registered protocol family 1
>>>>> >>> NET: Registered protocol family 17
>>>>> >>> NET: Registered protocol family 15
>>>>> >>> VFS: Mounted root (ext2 filesystem) readonly.
>>>>> >>> vserial: init done (handle: 1, owner: 1c001, mask: 2)
>>>>> >>>
>>>>> >>> Client: 0x1c001
>>>>> >>> start_thread current = 8282bd60 pc = 800bd0, sp = 1c26f30
>>>>> >>>
>>>>> >>> Client: 0x1c001
>>>>> >>>
>>>>> >>> Client: 0x1c001
>>>>> >>>
>>>>> >>> Client: 0x1c001
>>>>> >>>
>>>>> >>> Client: 0x1c001
>>>>> >>>
>>>>> >>> "
>>>>> >>>
>>>>> >>> It doesn't prints anything after this. For the first "vserial: init
>>>>> >>> done (handle: 0, owner: 18001, mask: 2)" it shows Client as NULL.
>>>>> >>> Second time it shows the correct client.
>>>>> >>>
>>>>> >>>
>>>>> >>>> showqueue
>>>>> >>> Key: (X) blocked, <X> on CPU, {X} halted, !X! aborted
>>>>> >>>
>>>>> >>> [255]:
>>>>> >>> WAIT_FOREVER
>>>>> >>> (roottask)
>>>>> >>>
>>>>> >>> [240]:
>>>>> >>> WAIT_FOREVER
>>>>> >>> (vtimer)
>>>>> >>> WAIT_FOREVER
>>>>> >>> (vrtc)
>>>>> >>>
>>>>> >>> [200]:
>>>>> >>> WAIT_FOREVER
>>>>> >>> (event)
>>>>> >>>
>>>>> >>> [110]:
>>>>> >>> RUNNING
>>>>> >>> <vserial>
>>>>> >>>
>>>>> >>> [100]:
>>>>> >>> WAIT_FOREVER
>>>>> >>> (L_timer)
>>>>> >>> WAIT_FOREVER
>>>>> >>> (L2_timer)
>>>>> >>>
>>>>> >>> [ 99]:
>>>>> >>> WAIT_FOREVER
>>>>> >>> (L_syscal)
>>>>> >>> WAIT_FOREVER
>>>>> >>> (L2_sysca)
>>>>> >>>
>>>>> >>> [ 98]:
>>>>> >>> WAIT_FOREVER
>>>>> >>> (L_1)
>>>>> >>> RUNNING
>>>>> >>> L2_1
>>>>> >>> WAIT_FOREVER
>>>>> >>> (L_49)
>>>>> >>> idle : idle_thread
>>>>> >>>
>>>>> >>> L2_1 represents the init process in wombat 2. This always shows L2_1
>>>>> >>> as RUNNING. But doesn't prints it within "<" and ">".
>>>>> >>>
>>>>> >>> Thanks,
>>>>> >>> Ashish
>>>>> >>>
>>>>> >>
>>>>> >
>>>>>
>>>>> _______________________________________________
>>>>> Developer mailing list
>>>>> Developer at okl4.org
>>>>> https://lists.okl4.org/mailman/listinfo/developer
>>>>>
>>>>
>>>> --
>>>>
>>>>
>>>
>>
>
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