lkml.org 
[lkml]   [2002]   [Jul]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: O(1) scheduler "complex" macros
Date
Hi Ingo,

thanks for the quick response!

> the best solution might be to just lock the 'next' task - this needs a new
> per-task irq-safe spinlock, to avoid deadlocks. This way whenever a task
> is in the middle of a context-switch it cannot be scheduled on another
> CPU.

We tested this and it looked good. But inserting a udelay(100) like:
...
prepare_arch_switch(rq, next);
udelay(100);
prev = context_switch(prev, next);
...
leads to a crash after 10 minutes. Again this looks like accessing an
empty page.

Does anything speak against such a test? It is there just to show up
quickly problems which we might normally get only after hours of running.

Regards,
Erich

-
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: 2005-03-22 13:27    [W:0.134 / U:0.036 seconds]
©2003-2014 Jasper Spaans. Advertise on this site