lkml.org 
[lkml]   [2006]   [Sep]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH 1/4] Blackfin: arch patch for 2.6.18
Date
On Tuesday 26 September 2006 05:42, Aubrey wrote:
> So, in the kernel space, there is always one bit in the IPEND register
> is set. And if there comes a timer interrupt event, in the timer
> interrupt handler, there should be two bits set in the IPEND register.
> Therefore, schedule happens in the return_from_int.
>
> So, I still say there is no latency here.
>

Well, if that's true, you should change your idle function not to
explicitly call schedule().

I haven't really understood how you preempt the idle task, but
I guess you can simplify the standard

| while (1) {
| while (!need_resched())
| asm("idle");
| schedule();
| }

to

| while (1)
| asm("idle");


Arnd <><
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-09-26 11:47    [W:0.106 / U:1.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site