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Re: [microblaze-uclinux] Re: BUG: scheduling while atomic
Hi,
I personally don't have any experience with Microblaze 7.20.a which you use
but I think that Xilinx released 7.20.b. You should try this version
or you can try to use 7.10.d which I used and there is no problem.
This problem could be relate with any cpu.
Please try it and let us know.
Thanks,
Michal
Victor G. wrote:
> On Sat, Aug 1, 2009 at 1:55 AM, Victor G.<vga9@xxxxxx> wrote:
>> Hi,
>>
>> My boot procedure is stuck before mounting partitions and displays the
>> error found at the end of the following kernel's printing to uart. The
>> system is ML505, build from scratch in 11.1, is similar to the
>> provided non-MMU example in 10.1 but does not have additional
>> peripherals like Ethernet controller. Both caches are enabled. Could
>> these be some stack size issues?
>>
>> ...
>> uartlite.0: ttyUL0 at MMIO 0x84020000 (irq = 2) is a uartlite
>> uartlite.1: ttyUL1 at MMIO 0x84000000 (irq = 0) is a uartlite
>> RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
>> uclinux[mtd]: RAM probe address=0x501c885c size=0xef000
>> Creating 1 MTD partitions on "RAM":
>> 0x00000000-0x000ef000 : "ROMfs"
>> uclinux[mtd]: set ROMfs to be root filesystem index=0
>> TCP cubic registered
>> NET: Registered protocol family 1
>> NET: Registered protocol family 17
>> VFS: Mounted root (cramfs filesystem) readonly.
>> Freeing unused kernel memory: 84k freed
>> BUG: scheduling while atomic: /0xb8083fb0/3261
>>
>> Stack:
>> 00001f10 00000001 00000000 00000000 00000000 500040e4 50170f94 5ffe8da0
>> b8083fb0 00000cbd 885bb200 00001e78 b0005008 00000013 00000010 5fe9ff21
>> 00000001 00000000 00000000 00000000 00000000 00000000 00000000 5fe9fe74
>> Call Trace: [<500040e4>]
>>
>>
>> Here is the petalinux-send-config otuput.
>> ----
>> #SYSTEM CONFIGS
>> CONFIG_DEFAULTS_XILINX=y
>> CONFIG_DEFAULTS_XILINX_XILINX_ML505_TEST_11_1=y
>> CONFIG_DEFAULTS_KERNEL_2_6=y
>> CONFIG_DEFAULTS_LIBC_NONE=y
>> CONFIG_VENDOR=Xilinx
>> CONFIG_PRODUCT=Xilinx-ML505-test_11.1
>> CONFIG_LINUXDIR=linux-2.6.x
>> CONFIG_LIBCDIR=
>>
>> ... etc
>
> Looking at http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/archive/2007/07/msg00043.html,
> I have tried enabling kernel preemption, but still see the "BUG:
> scheduling while atomic" error. I am using nonMMU kernel.
>
> The config file now has the following line:
> CONFIG_PREEMPT=y
>
> Following the thread further I found that two other patches helped
> solving the problem. That was July 2007.
> http://www.itee.uq.edu.au/~listarch/microblaze-uclinux/archive/2007/07/msg00137.html
> Have these patches being applied in the latest petalinux-v0.40-rc4 release?
>
> I will have to read about git to understand its history syntax and
> usage. For now it looks like the current files in my kernel directory
> are different from what the patch is suggesting.
>
> Thanks,
> Victor
>
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>
>
--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663
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