Messages in this thread | | | From | Jesse Barnes <> | Subject | Re: [PATCH] SN2 user-MMIO CPU migration | Date | Thu, 19 Jan 2006 18:18:43 -0800 |
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On Thursday, January 19, 2006 4:06 pm, Brent Casavant wrote: > #ifndef __ARCH_WANT_UNLOCKED_CTXSW > static inline int task_running(runqueue_t *rq, task_t *p) > @@ -936,6 +939,7 @@ static int migrate_task(task_t *p, int d > * it is sufficient to simply update the task's cpu field. > */ > if (!p->array && !task_running(rq, p)) { > + arch_task_migrate(p); > set_task_cpu(p, dest_cpu); > return 0; > } > @@ -1353,6 +1357,7 @@ static int try_to_wake_up(task_t *p, uns > out_set_cpu: > new_cpu = wake_idle(new_cpu, p); > if (new_cpu != cpu) { > + arch_task_migrate(p); > set_task_cpu(p, new_cpu); > task_rq_unlock(rq, &flags); > /* might preempt at this point */ > @@ -1876,6 +1881,7 @@ void pull_task(runqueue_t *src_rq, prio_ > { > dequeue_task(p, src_array); > dec_nr_running(p, src_rq); > + arch_task_migrate(p); > set_task_cpu(p, this_cpu); > inc_nr_running(p, this_rq); > enqueue_task(p, this_array); > @@ -4547,6 +4553,7 @@ static void __migrate_task(struct task_s > if (!cpu_isset(dest_cpu, p->cpus_allowed)) > goto out; > > + arch_task_migrate(p); > set_task_cpu(p, dest_cpu); > if (p->array) { > /*
Maybe you could just turn the above into mmiowb() calls instead? That would cover altix, origin, and ppc as well I think. On other platforms it would be a complete no-op.
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