Bugs In 24.11

Bugs in RTAI 24.1.11

At the end of dispatch_global_irq (in rtai.c) substitute:

        if (!test_bit(cpuid, &global.cpu_in_sti) && lflags) {
                hard_sti();
                while (test_and_clear_bit(0, &kbrdirq)) {
                        do_linux_irq(global_vector[KBRD_IRQ]);
                }
                linux_sti(0);
                return 1;
        }

with:

        if (lflags) {
                hard_sti();
                while (test_and_clear_bit(0, &kbrdirq)) {
                        do_linux_irq(global_vector[KBRD_IRQ]);
                }
                if (!test_bit(cpuid, &global.cpu_in_sti)) {
                        linux_sti(0);
                }
                return 1;
        }

Date: Thu, 10 Jul 2003 12:18:25 +0200
Subject: Re: Computer "temporarly" freeze when num lock is used

At 12.44 09/07/03 +0200, Paolo Mantegazza wrote:

>Look at RTAI stromoboli CVS version.

It works perfectly, thanks.
At first I was a little afraid because hundreds of lines where modified
from revision 1.86 to revision 1.87 in order to fix this bug. Then I
realized that 1.87 is quite similar to the stock 24.1.11 rtai.c. So I
suggest everybody to simply use the cvs version.

Thanks again

Alberto

Is it a bug that NEWLXRT does not clean up the LXRT slots ssociated with a process?

...I tried to find these answers looking through RTAI and Linux code, but to no avail. I did, however, uncover what I believe is an omission in infnewlxrt.c. When we delete the RTAI task (near the bottom of linux_process_termination) we fail to free the LXRT slot associated with the name of the task (assigned during rtai_task_init). There is a call to rt_drg_on_adr when we delete the task normally (i.e. rt_task_delete) that does _NOT_ appear here. I believe the in these two functions should be the same. This would explain why I've seen the task names not disappear from /proc/rtai/lxrt if my app does not call rt_task_delete on all RTAI tasks.

So, to sum up, usage of RTAI/Adeos is recommended in the etna (24.1.11) and stromboli (24.1.12) branches with:

• Adeos r8 patch
• Last update from the CVS for include/asm-i386/arti.h
• NEWLXRT, when user-space RT support is required.