Re: Real time

[michael trimarchi <trimarchi@gandalf.sssup.it>]

Richard B. Johnson wrote:

>On Thu, 1 Jul 2004, michael trimarchi wrote:
>
>  
>
>>Hi,
>>I'm working on porting modular real time scheduler on linux layer ...
>>I'm using only kernel thread... Actually I dont't call the
>>kernel_thread(init, .... and I inizialize my scheduler and OS struct...
>>I schedule my kernel thread... I'm trying to use the printk in the
>>kernel_thread but sometimes I dont't having result on the console. The
>>console does't print my debug on screen... Is there an unburred printk?
>>
>>Best regards
>>Michael Trimarchi
>>
>>    
>>
>
>You probably need to set up your kernel thread correctly. You should
>use:
>	kernel_thread(your_thread, NULL, CLONE_FS|CLONE_FILES);
>
>your_thread(void *whatever)
>{
>    exit_files(current);
>    daemonize();
>    /.../ fix up signals, etc.
>}
>
>Without CLONE_FILES, the file-descriptors and handles ultimately
>used for printk() may not work.
>
>Cheers,
>Dick Johnson
>Penguin : Linux version 2.4.26 on an i686 machine (5570.56 BogoMips).
>            Note 96.31% of all statistics are fiction.
>
>
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>  
>
I use CLONE_KERNEL but in my body I dont't call exit_files and
demonize... I change the linux scheduler width my scheduler and I use
only the switch_to  for context_switch from a task to another... I have
a task descriptor with a pointer to the task_t * ... At this time I have
a linux task_t struct and my personal task struct...

Best regards
Michael