Hi,
I'm confused about whether or not I can dynamically allocate memory in
my RT processes; and if I can then what am I NOT allowed to use the
memory for. I'm currently using RTLinux 1.3.
The RTL kernel uses kmalloc(X, GFP_KERNEL) to dynamically allocate
memory for task stacks, and I figure I'll use this too, but maybe this
call can only be made at initialization:
"- RTAI has support for dynamic thread creation, whereas in RTLinux all
the threads must be created at init_module time."
-Steve Papacharalambous, 10/6/99
On the other hand, the man pages for RTL say
"The parent task can send a one-integer value data to the new
task."
- rt_task_init man page
Indicating that threads can be created dynamically. Then again, the IPC
code for v1.3 tells me that
"'sem' must point to a * statically allocated structure."
"'mq' must point to a * statically allocated structure."
- rtl_ipc.c
but I want to dynamically create space for tasks, semaphores and message
queues, on an as-needed basis. Can I do this? Can I do it if I have a
restriction that I'll never kfree the memory until I unload the module?
Thanks in advance,
- Peter
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