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incubator-nuttx
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This commit is contained in:
Gregory Nutt 2016-11-24 09:56:12 -06:00
parent c03d126da6
commit eb9f8074c0
2 changed files with 13 additions and 7 deletions
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4
sched/sched/sched_mergepending.c
View File

@ -271,11 +271,11 @@ bool sched_mergepending(void)
return ret;
}
cpu = sched_cpu_select(ALL_CPUS /* ptcb->affinity */);
cpu = sched_cpu_select(ALL_CPUS /* ptcb->affinity */);
rtcb = current_task(cpu);
}
/* No more pending tasks can be made running. Move any reamaining
/* No more pending tasks can be made running. Move any remaining
* tasks in the pending task list to the ready-to-run task list.
*/

16
sched/sched/sched_removereadytorun.c
View File

@ -145,7 +145,7 @@ bool sched_removereadytorun(FAR struct tcb_s *rtcb)
cpu = rtcb->cpu;
tasklist = TLIST_HEAD(rtcb->task_state, cpu);
/* Check if the TCB to be removed is at the head of a ready to run list.
/* Check if the TCB to be removed is at the head of a ready-to-run list.
* For the case of SMP, there are two lists involved: (1) the
* g_readytorun list that holds non-running tasks that have not been
* assigned to a CPU, and (2) and the g_assignedtasks[] lists which hold
@ -154,9 +154,12 @@ bool sched_removereadytorun(FAR struct tcb_s *rtcb)
* only only removing the head of that list can result in a context
* switch.
*
* The tasklist RUNNABLE attribute will inform us if the list holds the
* currently executing and task and, hence, if a context switch could
* occur.
* rtcb->blink == NULL will tell us if the TCB is at the head of the
* ready-to-run list and, hence, a candidate for the new running task.
*
* If so, then the tasklist RUNNABLE attribute will inform us if the list
* holds the currently executing task and, hence, if a context switch
* should occur.
*/
if (rtcb->blink == NULL && TLIST_ISRUNNABLE(rtcb->task_state))
@ -205,7 +208,10 @@ bool sched_removereadytorun(FAR struct tcb_s *rtcb)
rtrtcb = (FAR struct tcb_s *)rtrtcb->flink);
/* Did we find a task in the g_readytorun list? Which task should
* we use? We decide strictly by the priority of the two tasks.
* we use? We decide strictly by the priority of the two tasks:
* Either (1) the task currently at the head of the g_assignedtasks[cpu]
* list (nexttcb) or (2) the highest priority task from the
* g_readytorun list with matching affinity (rtrtcb).
*/
if (rtrtcb != NULL && rtrtcb->sched_priority >= nxttcb->sched_priority)