Messages in this thread | | | From | Keith Owens <> | Subject | Re: [patch] 2.4.21-pre5 correct scheduling of idle tasks [ all arch ] | Date | Fri, 28 Mar 2003 09:17:12 +1100 |
| |
On Thu, 27 Mar 2003 16:54:47 +0100, mikpe@csd.uu.se wrote: >Keith Owens writes: > > There are several inconsistencies in the scheduling of idle tasks and, > > for UP, tracking which task is on the cpu. This patch standardizes > > idle task scheduling across all architectures and corrects the UP > > error, it is just a bug fix. >... > > To make it worse, on UP a task is assigned to a cpu but never released. > > Very quickly, all tasks are marked as currently running on cpu 0 :(. > >->cpus_runnable and task_has_cpu() are SMP-only, as a quick grep >through 2.4.20 will tell you. There is no UP bug here to fix.
cpus_runnable has task_has_cpu are not guarded by CONFIG_SMP. task_set_cpu() is called for UP as well as SMP. UP is missing the corresponding call to task_release_cpu().
- 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/
| |